Academic literature on the topic 'Maximum Tension'
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Journal articles on the topic "Maximum Tension"
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Denis Lavnikevich. "MAXIMUM TENSION." Current Digest of the Russian Press, The 72, no. 008 (February 23, 2020): 12. http://dx.doi.org/10.21557/dsp.58098897.
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Ahern, Tom. "Maximum tension palatoplasty." Journal of Equine Veterinary Science 25, no. 2 (February 2005): 46–47. http://dx.doi.org/10.1016/j.jevs.2005.01.004.
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Da̧browski, Mariusz P., and H. Gohar. "Abolishing the maximum tension principle." Physics Letters B 748 (September 2015): 428–31. http://dx.doi.org/10.1016/j.physletb.2015.07.047.
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Mortman, Nadav, Ramalakshmi Ramasamy, and Phillip Smith. "ELDERLY MOUSE DETRUSOR MAINTAINS ITS PEAK FORCE OF CONTRACTION OVER TIME." Innovation in Aging 6, Supplement_1 (November 1, 2022): 665. http://dx.doi.org/10.1093/geroni/igac059.2451.
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Abstract Aging is a risk factor for urinary dysfunction. Detrusor weakening has been thought to contribute to the old bladder phenotype. Animal detrusor strips have been used to study bladder function. Strength of contraction in detrusor strips depends on length. This is referred to as the “length-tension relationship.” The aim of our study was to investigate this relationship in a mouse model by comparing the length-tension relationship in old and mature mice. We hypothesize that aging is associated with no change in active detrusor tension capability, however maximal tension will occur at longer lengths.We used two groups of male C57/Bl6 mice for this study, mature 11-12 month old mice and old 22-23 month old mice. Longitudinal intact bladder strips were harvested and placed in a vertical tissue bath between tension recording transducer hooks. Passive tensions and KCl induced contraction tensions for step-wise increments of stretch were observed.In the old group, normalized strip length at the point of maximum active tension was increased by ~13% on average as compared to the mature group with a statistically significant difference (P value 0.0171). Interestingly, the maximum active tension between groups did not differ by age. In conclusion, detrusor from old mice achieve similar maximum active tensions as that from mature mice, however at an increased length. This finding argues against a common belief that the bladder weakens with age. Instead, the aging bladder may adapt to increased filling volumes with an ability to operate at a similar strength of a younger bladder.
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Deng, Peng, Rong Hua Huang, and Yin Jie Ma. "Improvement and Application of the Maximum Bubble Pressure Tensiometer." Applied Mechanics and Materials 333-335 (July 2013): 113–16. http://dx.doi.org/10.4028/www.scientific.net/amm.333-335.113.
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In order to measure the equilibrium surface tension of blended fuels, a tensiometer based on maximum bubble pressure method was built. Microscope was used to measure the capillary internal diameter precisely. And the operation guidelines of the tensiometer were calibrated by purified water to improve its accuracy. Then, the equilibrium surface tensions of bio-ethanol diesel fuels were investigated at a wide range of temperature and mass fractions. Results show that surface tension of blend fuels decrease linearly as temperature increases and decrease monotonically while ethanol mass fraction increases.
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Matsumoto, K. "Surface tension maximum of liquid 3He." Physica B: Condensed Matter 284-288 (July 2000): 198–99. http://dx.doi.org/10.1016/s0921-4526(99)02387-x.
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Novriandi, Dicky, Azriyenni Azhari Zakri, and Edy Ervianto. "Sag and Tension of 275 kV Transmission Line using Catenary." International Journal of Electrical, Energy and Power System Engineering 2, no. 3 (October 9, 2019): 15–20. http://dx.doi.org/10.31258/ijeepse.2.3.15-20.
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This research will develop a catenary method to determine the sag and tension analysis on the 275 kV transmission line conductors. The catenary method is dependent on the equation of the weight of the conductor, the maximum tensile stress of the conducting wire, the length of the span, and the maximum sag of the conductor. The method will be used in determining the value of sag and tension with the design of the model using software AutoCAD. The results of research for the same tower sag height of 6.86 m, with a tension of 4610.83 kg and a conductor length of 401.06 m, while sag for the tower is not the same height of 8.14 m, with a tension of 4612.84 kg, and changes in conductor length 401.06 m. The increase in current causes the sag value to increase, when the minimum current sag value is 6.9828 m, and the maximum current sag value increases to 8.44 m. While the tension will decrease along so that temperature is increased the current minimum pressure of 4531.27kg, and at the time of maximum tension of 3749.728kg. Sag and tension are also affected by ambient temperature when the minimum temperature is 20 ℃ sags are 6.8621 m and when the maximum temperature is 40 ℃ sag increases to 7.793492 m. Tension will decrease with each increase in temperature when the minimum temperature is 20 ℃ tension 4610.538 kg when the maximum temperature is 40 ℃ the tension is reduced to 4062.345 kg.
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CHEN, Pei Shan, and Mamoru KAWAGUCHI. "SHAPES OF MAXIMUM RIGIDITY FOR TENSION STRUCTURES." Journal of Structural and Construction Engineering (Transactions of AIJ) 60, no. 476 (1995): 113–20. http://dx.doi.org/10.3130/aijs.60.113.
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Cui, Peng, Yi Zhang, and Yuan Xue. "A novel method of analyzing spinning tensions for yarn breakage detection in ring frame." Journal of Engineered Fibers and Fabrics 15 (January 2020): 155892502090297. http://dx.doi.org/10.1177/1558925020902979.
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To reduce yarn breakage rates in spinning and increase production efficiency, we developed a detection device for spinning tension of the ring-spinning system by implementing the stress and displacement sensors with the yarn guide plate. The as-developed device receives data through signal acquisition system, and then the yarn tension at the thread guide and the displacement of the guide plate are obtained by solving the coupled physical-mathematical equations describing yarn tensions in twisting, ballooning, and winding processes, which gives the real-time dynamics. We found that the yarn tensions show periodical fluctuations along with the reciprocating movement of the yarn guide plate. In particular, the maximum tension at the initial winding stage has increased 12.6% when compared to the second winding stage, while the maximum tension at the third winding stage has increased 10.6% when compared to the second winding stage.
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Schramm, Laurier L., and Loren G. Hepler. "Surface and interfacial tensions of aqueous dispersions of charged colloidal (clay) particles." Canadian Journal of Chemistry 72, no. 9 (September 1, 1994): 1915–20. http://dx.doi.org/10.1139/v94-243.
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We have measured (du Nouy ring and maximum bubble pressure methods) suspension–air surface tensions of aqueous suspensions of montmorillonite and have observed that these surface tensions are larger than those of pure water at the same temperatures. Further measurements have shown that dispersed montmorillonite also increases the suspension–toluene interfacial tension compared with that of pure water–toluene. Similar measurements on aqueous suspensions of kaolinite have yielded suspension–air interfacial tensions with uncertainties as large as the observed (small) effect, and also shown that the suspension–toluene interfacial tension is decreased (opposite to the effect of montmorillonite) by amounts larger than the experimental uncertainties. Measurements of maximum bubble pressures at different flow rates have provided information about the effect of surface age on observed surface tensions.
Dissertations / Theses on the topic "Maximum Tension"
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Phung, Kent, and Charles Chu. "Adhesives for Load-Bearing Timber-Glass Elements : Elastic, plastic and time dependent properties." Thesis, Linnéuniversitetet, Institutionen för bygg- och energiteknik (BE), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-27386.
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This thesis work is part of an on-going project regarding load-bearing timber glass composites within the EU program WoodWisdom-Net. One major scope of that project is the adhesive material between the glass and timber parts. The underlying importance of the bonding material is related to the transfer of stress between the two materials – the influence of the adhesive stiffness and ductility on the possibility of obtaining uniform stress distributions. In this study the mechanical properties of two different adhesives are investigated, an epoxy (3M DP490) and an acrylate (SikaFast 5215). The differences of the adhesives lay in dissimilar stiffness, strength and viscous behaviour. In long term load caring design is important to understand the materials behavior under a constant load and a permanent displacement within the structure can cause major consequences. Therefore the main aim in this project is to identify the adhesives strength, deformation capacity and possible viscous (time dependent) effects. Because of the limitation of equipment and time this study is restricted to only three different experiments. Three different types of tensile tests have been conducted: monotonic, cyclic relaxation tests.The results of the experiments show that 3M DP490 has a higher strength and a smaller deformation capacity as compared to the SikaFast 5215. Thus, the SikaFast 5215 is more ductile. The 3M DP490 exhibits a lower loss of strength under constant strain (at relaxation). SikaFast 5215 showed also a large dependency of strain level on the stress loss in relaxation.
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Кучірка, Ю. М. "Удосконалені методи підвищення точності результатів дослідження поверхневого натягу рідин та пристрій для їх реалізації." Thesis, Івано-Франківський національний технічний університет нафти і газу, 2013. http://elar.nung.edu.ua/handle/123456789/4629.
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Дисертація присвячена дослідженню і розробленню удосконалених методів для дослідження ПН рідин та розчинів ПАР на межі контакту рідина - газ. Проаналізовано відомі методи і прилади для вимірювання ПН рідин і розчинів ПАР за максимальним тиском у бульбашці, внаслідок чого визначено їхні недоліки. Представлено удосконалені методи, що враховують несферичність меніска у момент максимального тиску у бульбашці, і не потребують попереднього визначення густини рідини та прецизійної системи занурення капілярів на певну глибину цієї рідини, а також пристрій з їх реалізації, який дозволяє автоматизовано досліджувати РПН і ДПН рідин і розчинів ПАР за допомогою трьох капілярів за максимальними тисками у бульбашках, які утворюються на їх нижніх торцях.Диссертация посвящена разработке усовершенствованных методов и устройства по их реализации для автоматизированного исследования поверхностного натяжения (ПН) жидкостей и растворов ПАВ на границе жидкость - газ с использованием трех зафиксированных между собой капилляров с различными внутренними радиусами и расстоянием между их нижними торцами. В первом разделе осуществлена оценка экспериментальных условий проведения исследования ПН однокомпонентных жидкостей, промышленных растворов ПАВ и биологических жидкостей человека, проанализированы известные методы и приборы для измерения ПН жидкостей и растворов ПАВ за максимальным давлением в пузырьке. Определены их недостатки, сформулированы задачи и направления по их усовершенствованию. Во втором разделе представлены усовершенствованные методы определения равновесного (РПН) и динамического (ДПН) ПН жидкостей и растворов ПАВ, учитывающие отклонения поверхности мениска от полусферической формы в момент максимального давления в пузырьке, которые не требуют предварительного определения плотности жидкости и прецизионной системы погружения капилляров на заданную глубину жидкости, а также методики, которые повышают точность определения РПН и ДПН жидкостей и растворов ПАВ. В третьем разделе описаны требования к устройству с целью реализации им разработанных методов определения ПН жидкостей и растворов ПАВ, а также структурная, функциональная, электрическая, пневматическая схемы, конструкция и программное обеспечение трикапилярного устройства для автоматизированного исследования РПН и ДПН жидкостей и растворов ПАВ. Четвертый раздел посвящен метрологическому анализу погрешностей предложеных методов определения РПН и ДПН жидкостей и растворов ПАВ, а также трикапилярного устройства. Показано, что граничная погрешность определения этим устройством РПН и ДПН жидкостей и растворов ПАВ составит 0,45 ÷ 0,6 мН/м для значений ПН в интервале от 10 до 100 мН/м. В пятом разделе разработана процедура проведения лабораторных испытаний трикапилярного устройства, приведены результаты лабораторных и натурных испытаний, а также выводы, которые были получены при их анализе.
Dissertation is dedicated to research and development of measurement of surface tension at the boundary of contact of fluid and gas and the device, that realizes developed improved methods by using of maximum pressure in the bubble. The known methods of measuring of surface tension of fluids and surfactants solutions by using of maximum pressure in the bubble are analyzed, their merits and demerits are determined. Presented improved methods that take into account deviations from hemispherical surface meniscus forms at the moment of the maximum pressure in the bubble and do not require prior density measurement of liquids and precision system for capillary immersion at a certain depth of fluid and the device with their implementation, allowing automatically investigate surface tension liquids by using of maximum pressure in the bubble.
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Ndoye, Mamadou Mustapha. "Contribution à l'étude du transistor bipolaire hyperfréquence sur puce de silicium." Bordeaux 1, 1997. http://www.theses.fr/1997BOR10682.
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Ce travail est une contribution à l'étude du transistor bipolaire hyperfréquence sur puce de silicium. Il présente tout d’abord deux méthodes originales permettant de réduire la Capacité extrinsèque Base-Collecteur, d'augmenter la tension de claquage Base-Collecteur, d'augmenter la tension Early VA, d'augmenter le gain en puissance maximal Gpmax et d'augmenter la fréquence de transition FT. Il présente ensuite un nouveau transistor, de structure hybride entre le NPN vertical et le NPN latéral, baptisé bipolaire-CLEV (à Collecteur Latéral-Emetteur Vertical). Ce travail est généralisable à d'autres technologies de transistors hyperfréquences telles que les transistors à substrats III-V ou les transistors à hétérojonctionsThis work is a contribution to the study of the high-speed bipolar transistor on silicon chip. First, it presents two original methods allowing to reduce the Base-Collector extrinsic Capacitance, to increase the Base-Collector breakdown voltage, to increase the Voltage Early VA, to increase the maximum power gain Gpmax and to increase the transition frequency FT. Then, it presents a new transistor, hybrid structure between the vertical NPN and the lateral NPN, named bipolar-CLEV (lateral collector-vertical emitter). This study can be generalized to other high speed transistor technologies such as III-V substrate transistors or heterojunction transistors
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Ortiz, Thomas. "Two dimensional Maximal Supergravity, Consistent Truncations and Holography." Phd thesis, Ecole normale supérieure de lyon - ENS LYON, 2014. http://tel.archives-ouvertes.fr/tel-01070735.
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A complete non trivial supersymmetric deformation of the maximal supergravity in two dimensions is achieved by the gauging of a SO(9) group. The resulting theory describes the reduction of type IIA supergravity on an AdS_2 x S^8 background and is of first importance in the Domain-Wall / Quantum Field theory correspondence for the D0-brane case. To prepare the construction of the SO(9) gauged maximal supergravity, we focus on the eleven dimensional supergravity and the maximal supergravity in three dimensions since they give rise to important off-shell inequivalent formulations of the ungauged theory in two dimensions. The embedding tensor formalism is presented, allowing for a general desciption of the gaugings consistent with supersymmetry. The SO(9) supergravity is explicitly constructed and applications are considered. In particular, an embedding of the bosonic sector of the two-dimensional theory into type IIA supergravity is obtained. Hence, the Cartan truncation of the SO(9) supergravity is proved to be consistent. This motivated holographic applications. Therefore, correlation functions for operators in dual Matrix models are derived from the study of gravity side excitations around half BPS backgrounds. These results are fully discussed and outlooks are presented.
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Pereira, Claudia Cristina. "Um estudo do metodo da continuação aplicado a analise do maximo carregamento dos sistemas de potencia." reponame:Repositório Institucional da UFSC, 1998. http://repositorio.ufsc.br/xmlui/handle/123456789/77439.
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Dissertação (Mestrado) - Universidade Federal de Santa Catarina, Centro TecnologicoMade available in DSpace on 2012-10-17T04:13:44Z (GMT). No. of bitstreams: 0Bitstream added on 2016-01-09T00:25:52Z : No. of bitstreams: 1 149019.pdf: 5566618 bytes, checksum: de54225315919a581876f0ca23513303 (MD5)
Este trabalho aborda o problema de determinação do máximo carregamento de um sistema de potência, sob o ponto de vista de análise da estabilidade de tensão. A operação da rede elétrica em condições limite no que diz respeito à capacidade dos equipamentos, tem exigido o desenvolvimento de métodos adequados tanto para a determinação da solução das equações do fluxo de potência no ponto de máxima demanda, como para a detecção da proximidade do ponto crítico sob o aspecto de estabilidade de tensão. Apresenta-se a aplicação do Método da Continuação ao problema de determinação da maxima demanda da rede elétrica. Este método pode ser formulado em coordenadas polares e em coordenadas retangulares. Uma metodologia baseada na modelagem em coordenadas retangulares é mostrada, em duas versões diferentes no que diz respeito ao etapa de correção do Método da Continuação. Os resultados da aplicação da metodologia a sistemas de variados portes ilustram a potencialidade da abordagem baseada no Método da Continuação para a detecção e identificacão de áreas sujeitas ao colapso de tensão, em estudos de planejamento e operação.
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Llacua, Zarate Luis Alberto. "Estimação rapida do ponto de maximo carregamento para a analise de estabilidade de tensão de sistemas eletricos de potencia." [s.n.], 2004. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260236.
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Orientador: Carlos Alberto de Castro JuniorTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Eletrica e de Computação
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Resumo: o objetivo deste trabalho de pesquisa é propor metodologias para a estimação do ponto de máximo carregamento (PMC) de sistemas elétricos de potência com vistas à análise de estabilidade de tensão. A principal característica dos métodos propostos é a extrema rapidez de cálculo com a manutenção da precisão dos resultados. São utilizadas ferramentas de análise apropriadas que, devidamente combinadas e integralizadas, produzem os resultados esperados. Dentre elas, pode-se citar a análise de sensibilidade, análise de sistemas de equações mal condicionadas e/ou sem solução, e técnicas de otimização. Os métodos essencialmente com enfoque estático, baseiam-se em realizar um certo número de cálculos de fluxo de carga para diferentes níveis de carga no espaço de parâmetros. Assim, o caminho com direção ao PMC é baseado em simples processos de incrementos de carga e cortes de carga, que serão detalhados nos capítulos respectivos. Ressalta-se que dois métodos são presentados, com características bem diferentes em relação ao processo de incrementos de carga com direção ao PMC. A similaridade é apresentada apenas no processo de recuperação da factibilidade. Espera-se que as metodologia que resultem deste trabalho de pesquisa possam ser utilizadas de forma rotineira na análise de estabilidade de tensão de redes elétricas durante o planejamento da operação e, potencialmente, em ambientes cujas restrições de esforço computacional sejam ainda mais severas, como em ambientes de operação e análise em tempo real
Abstract: The goal of this research work is to propose methodologies for estimating the maximum loading point (MLP) of power systems for voltage stability analysis. The main feature of the proposed methods is the fast computation of MLP, while maintaining the precision of the results. Appropriate analysis tools are integrated to provide the expected results. Among them, are can mention sensitivity analysis, ill-conditioned and/or infeasible system analysis and optimization techniques. The proposed methods, with a static approach, is based on solving a certain number of load flow calculations for different load levels. Therefore, the path toward MLP is based on simple load increments or curtailments. It must be emphasized that two methods will be presented, with different characteristics with respect to the load increment processo Moreover, they are similar with respect to the feasibility restoration processo It is expected that the proposed methods can be routinely used in power systems voltage stability analysis in operation planning and potentially in enviroments with severe computational effort constraints, such as in real time operation
Doutorado
Energia Eletrica
Doutor em Engenharia Elétrica
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Souza, Tiago de Jesus. "Previsão da curva tensão-recalque em solos tropicais arenosos a partir de ensaios de cone sísmico." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-25042012-163755/.
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Apresenta-se neste trabalho a aplicação de um método para a previsão da curva tensão-recalque de fundações diretas assentes em solos tropicais arenosos a partir de resultados de ensaios de cone sísmico (SCPT). Os locais estudados foram os campos experimentais de fundações da EESC/USP - São Carlos e da UNESP-Bauru, onde existem resultados de provas de carga realizados a diferentes profundidades, assim como resultados de ensaios SCPT. As previsões realizadas apresentaram bons resultados, após ajustes dos parâmetros f e g, pois as curvas tensão-recalque estimadas foram próximas a aquelas obtidas a partir de provas de carga em placa, para as profundidades maiores que 1,5 metros. Verifica-se assim a aplicabilidade do método, após seu ajuste, para reproduzir a curva tensão-recalque neste tipo de solo, empregando uma abordagem mais racional, com menor dependência de correlações empíricas. Destaca-se nesta pesquisa que existe uma variabilidade dos resultados de ensaios SCPT e de provas de carga que está relacionada com a mudança de sucção no solo. Para o campo experimental de São Carlos foi possível ainda fazer uma avaliação da variabilidade nas previsões realizadas, pois existe maior número de resultados de ensaios de campo e provas de cargas disponíveis.It is presented in this dissertation the use of a method for predicting the stress-settlement curve of shallow foundations on tropical sandy soils based on seismic cone (SCPT) test results. The studied sites were the experimental research sites from USP - São Carlos, and UNESP - Bauru, Brazil, where there are results from plate load tests conducted at various depths, as well as SCPT test results. The stress-settlement curve predictions show good results, after adjusting the parameters f and g, because the estimated curves were close to those obtained from plate load tests, to depths greater than 1.5 meters. The applicability of the method, after its adjustment, to reproduce the stress-settlement curve for this type of soil, was verified employing a more rational approach with less reliance on empirical correlations. It is highlighted in this research that there is variability on SCPT and plate load test results, which is related to the change in soil suction. It was also possible to access the variability on the prediction for the USP São Carlos site, since there is a greater number of in situ and plate load tests in this site.
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Romanello, Michael T. "Load Response Analysis of the WAY-30 Test Pavements: US Route 30, Wayne County, Ohio." Ohio : Ohio University, 2007. http://www.ohiolink.edu/etd/view.cgi?ohiou1196092689.
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Zeferino, Cristiane Lionço. "Estudo do máximo carregamento em sistemas de energia elétrica via método da barreira modificada." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/18/18133/tde-08032007-113530/.
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Nesta dissertação é aplicado o método da função Lagrangiana barreira modificada (FLBM), uma variante do método de pontos interiores, para determinação do máximo carregamento em sistemas de energia elétrica. A formulação do problema tem como restrições de igualdade as equações de balanço de potência do sistema, em sua forma parametrizada, e como restrições de desigualdade os limites de tensões nas barras e os limites de geração de potência reativa nas barras com controle de reativo. Os resultados encontrados com a técnica de otimização estática utilizada neste estudo são confrontados com os resultados obtidos com o método primal-dual barreira logarítmica. Para realização dos testes de desempenho da metodologia proposta, utilizou-se como padrão os sistemas do IEEE de 14, 57 e 118 barras. Os testes demonstraram a robustez e a eficiência do algoritmo proposto.In this work the modified barrier Lagrangian function (MBLF) method, a variant of the interior point method. The formulation of the problem will have as constraints of equality the power system swinging equations, in a parametrized form, and as inequality constraints the voltage limits in the buses and the reactive generation limits in the buses with reactive control. The results found with the static optimization technique used in this study are confronted with the results obtained with the primal-dual barrier logarithmic method. The performance of the method is illustrated using as pattern the systems IEEE 14, 57 and 118 bars. The tests demonstrated the robustness and the efficiency of the proposed algorithm.
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Attia, Sid Ahmed. "Sur la commande des systèmes non linéaires à dynamique hybride." Phd thesis, Grenoble INPG, 2005. http://tel.archives-ouvertes.fr/tel-00082495.
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This dissertation concerns the development of reduced complexity controllers forhybrid switched systems. A diverse number of applications from automotive industry, fluid dyna-
mics and power systems are treated. Some general open loop optimal and predictive control schemes
are proposed. The main motivation behind each method is the reduction of the combinatorics. In
this thesis, two main contributions can be distinguished. The first one concerns the optimal control
of switched nonlinear systems where an algorithm based on strong variations is proposed and some
convergence results proven. The complexity of the scheme is linear in the number of locations, this
in conjunction with its simplicity makes it attractive for large scale systems. An example from
the automotive industry is treated to further illustrate the tractability of the scheme. The second
contribution concerns the development of a hierarchical approach for switched nonlinear systems.
At the lower level, feedback controllers are associated to each location and at the higher level a
predictive approach with a reduced order parametrization is in force. Based on this methodology,
two schemes are developed and successfully tested in respectively fluid stabilisation by actuator
switching and voltage stabilization in power systems.
Books on the topic "Maximum Tension"
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Greenblatt, Seth A. Tensor methods for full-information maximum likelihood estimation: Unconstrained estimation. Reading: University of Reading. Department of Economics, 1992.
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Greenblatt, Seth A. Tensor methods for full-information maximum likelihood estimation: Estimation with parameter constraints. Reading: University of Reading. Department of Economics, 1992.
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Nachtomy, Ohad. Living Mirrors. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780190907327.001.0001.
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This work presents Leibniz’s view of infinity and the central role it plays in his theory of living beings. Chapter 1 introduces Leibniz’s approach to infinity by presenting the central concepts he employs; chapter 2 presents the historical background through Leibniz’s encounters with Galileo and Descartes, exposing a tension between the notions of an infinite number and an infinite being; chapter 3 argues that Leibniz’s solution to this tension, developed through his encounter with Spinoza (ca. 1676), consists of distinguishing between a quantitative and a nonquantitative use of infinity, and an intermediate degree of infinity—a maximum in its kind, which sheds light on Leibniz’s use of infinity as a defining mark of living beings; chapter 4 examines the connection between infinity and unity; chapter 5 presents the development of Leibniz’s views on infinity and life; chapter 6 explores Leibniz’s distinction between artificial and natural machines; chapter 7 focuses on Leibniz’s image of a living mirror, contrasting it with Pascal’s image of a mite; chapter 8 argues that Leibniz understands creatures as infinite and limited, or as infinite in their own kind, in distinction from the absolute infinity of God; chapter 9 argues that Leibniz’s concept of a monad holds at every level of reality; chapter 10 compares Leibniz’s use of life and primitive force. The conclusion presents Leibniz’s program of infusing life into every aspect of nature as an attempt to re-enchant a view of nature left disenchanted by Descartes and Spinoza.
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Patton, Raymond A. Thatcher, Reagan, Jaruzelski. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780190872359.003.0006.
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This chapter examines punk’s intertwined relationship with the rise of neoconservative/neoliberal politics amid the regimes of US president Ronald Reagan, UK prime minister Margaret Thatcher, and martial law Poland under first secretary of the Communist Party General Wojciech Jaruzelski. In each country, punk was intertwined with a shift from a Cold War political framework toward neoliberalism and an increasingly culturally based political alignment. Examining Oi! and 2 Tone in the United Kingdom, and straightedge, hardcore, and the punks around the ’zine Maximum Rocknroll in the United States, it shows how punk scenes around the world became entangled in these shifts and found themselves fracturing along the newly relevant political categories. In Eastern Europe, market reforms and efforts to revive the Polish economy and cultural sphere exacerbated tensions between subcultural capital and actual capital, creating analogous divisions within its punk scenes.
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Woloch, Nancy. A Class by Herself. Princeton University Press, 2017. http://dx.doi.org/10.23943/princeton/9780691002590.001.0001.
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This book explores the historical role and influence of protective legislation for American women workers, both as a step toward modern labor standards and as a barrier to equal rights. Spanning the twentieth century, the book tracks the rise and fall of women-only state protective laws—such as maximum hour laws, minimum wage laws, and night work laws—from their roots in progressive reform through the passage of New Deal labor law to the feminist attack on single-sex protective laws in the 1960s and 1970s. The book considers the network of institutions that promoted women-only protective laws, such as the National Consumers' League and the federal Women's Bureau; the global context in which the laws arose; the challenges that proponents faced; the rationales they espoused; the opposition that evolved; the impact of protective laws in ever-changing circumstances; and their dismantling in the wake of Title VII of the Civil Rights Act of 1964. Above all, the book examines the constitutional conversation that the laws provoked—the debates that arose in the courts and in the women's movement. Protective laws set precedents that led to the Fair Labor Standards Act of 1938 and to current labor law; they also sustained a tradition of gendered law that abridged citizenship and impeded equality for much of the century. Drawing on decades of scholarship, institutional and legal records, and personal accounts, the book sets forth a new narrative about the tensions inherent in women-only protective labor laws and their consequences.
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Cooper, Stephen, and Clorinda Donato, eds. John Fante's Ask the Dust. Fordham University Press, 2020. http://dx.doi.org/10.5422/fordham/9780823287864.001.0001.
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Eight decades after Ask the Dust first appeared, John Fante’s Ask the Dust: A Joining of Voices and Views shows how and why the once-forgotten novel continues to earn its place among the signal works of twentieth-century world literature in our own moment of the twenty-first. Gathered here are twenty responses to the novel from a wide variety of contributors, both American and Italian, including scholars, journalists, filmmakers, creative writers, translators, archive workers, a musicologist, a choreographer, and an American Indian who discovered the book while incarcerated in a California maximum-security prison. In recognizing the novel’s enduring attractions and evolving critical challenges, editors Cooper and Donato have orchestrated the volume’s contents to address both academic audiences and the countless word-of-mouth fans who have made Ask the Dust a perennial international classic. With its array of essays, interviews, talks, memoirs, and correspondence—including an important letter by Fante, newly discovered and published here for the first time—the volume raises Fante studies to a commanding level of significance through its diversity of perspectives on the cornerstone of the author’s oeuvre. Italian American to its core, the picaresque brio of Ask the Dust resonates all the more profoundly today as readers debate, reinterpret, and embrace the abiding truths of Arturo Bandini’s struggle with immigrant dreams, ethnic tensions, romantic love, existential demons, and the better angels of his inherited Catholic faith against the backdrop of that “sad flower in the sand,” the Depression-era city of Los Angeles.
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Zydroń, Tymoteusz. Wpływ systemów korzeniowych wybranych gatunków drzew na przyrost wytrzymałości gruntu na ścinanie. Publishing House of the University of Agriculture in Krakow, 2019. http://dx.doi.org/10.15576/978-83-66602-46-5.
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The aim of the paper was to determine the influence of root systems of chosen tree species found in the Polish Flysch Carpathians on the increase of soil shear strength (root cohesion) in terms of slope stability. The paper's goal was achieved through comprehensive tests on root systems of eight relatively common in the Polish Flysch Carpathians tree species. The tests that were carried out included field work, laboratory work and analytical calculations. As part of the field work, the root area ratio (A IA) of the roots was determined using the method of profiling the walls of the trench at a distance of about 1.0 m from the tree trunk. The width of the. trenches was about 1.0 m, and their depth depended on the ground conditions and ranged from 0.6 to 1.0 m below the ground level. After preparing the walls of the trench, the profile was divided into vertical layers with a height of 0.1 m, within which root diameters were measured. Roots with diameters from 1 to 10 mm were taken into consideration in root area ratio calculations in accordance with the generally accepted methodology for this type of tests. These measurements were made in Biegnik (silver fir), Ropica Polska (silver birch, black locust) and Szymbark (silver birch, European beech, European hornbeam, silver fir, sycamore maple, Scots pine, European spruce) located near Gorlice (The Low Beskids) in areas with unplanned forest management. In case of each tested tree species the samples of roots were taken, transported to the laboratory and then saturated with water for at least one day. Before testing the samples were obtained from the water and stretched in a. tensile testing machine in order to determine their tensile strength and flexibility. In general, over 2200 root samples were tested. The results of tests on root area ratio of root systems and their tensile strength were used to determine the value of increase in shear strength of the soils, called root cohesion. To this purpose a classic Wu-Waldron calculation model was used as well as two types of bundle models, the so called static model (Fiber Bundle Model — FIRM, FBM2, FBM3) and the deformation model (Root Bundle Model— RBM1, RBM2, mRBM1) that differ in terms of the assumptions concerning the way the tensile force is distributed to the roots as well as the range of parameters taken into account during calculations. The stability analysis of 8 landslides in forest areas of Cicikowicleie and Wignickie Foothills was a form of verification of relevance of the obtained calculation results. The results of tests on root area ratio in the profile showed that, as expected, the number of roots in the soil profile and their ApIA values are very variable. It was shown that the values of the root area ratio of the tested tree species with a diameter 1-10 ram are a maximum of 0.8% close to the surface of the ground and they decrease along with the depth reaching the values at least one order of magnitude lower than close to the surface at the depth 0.5-1.0 m below the ground level. Average values of the root area ratio within the soil profile were from 0.05 to 0.13% adequately for Scots pine and European beech. The measured values of the root area ratio are relatively low in relation to the values of this parameter given in literature, which is probably connected with great cohesiveness of the soils and the fact that there were a lot of rock fragments in the soil, where the tests were carried out. Calculation results of the Gale-Grigal function indicate that a distribution of roots in the soil profile is similar for the tested species, apart from the silver fir from Bie§nik and European hornbeam. Considering the number of roots, their distribution in the soil profile and the root area ratio it appears that — considering slope stability — the root systems of European beech and black locust are the most optimal, which coincides with tests results given in literature. The results of tensile strength tests showed that the roots of the tested tree species have different tensile strength. The roots of European beech and European hornbeam had high tensile strength, whereas the roots of conifers and silver birch in deciduous trees — low. The analysis of test results also showed that the roots of the studied tree species are characterized by high variability of mechanical properties. The values Of shear strength increase are mainly related to the number and size (diameter) of the roots in the soil profile as well as their tensile strength and pullout resistance, although they can also result from the used calculation method (calculation model). The tests showed that the distribution of roots in the soil and their tensile strength are characterized by large variability, which allows the conclusion that using typical geotechnical calculations, which take into consideration the role of root systems is exposed to a high risk of overestimating their influence on the soil reinforcement. hence, while determining or assuming the increase in shear strength of soil reinforced with roots (root cohesion) for design calculations, a conservative (careful) approach that includes the most unfavourable values of this parameter should be used. Tests showed that the values of shear strength increase of the soil reinforced with roots calculated using Wu-Waldron model in extreme cases are three times higher than the values calculated using bundle models. In general, the most conservative calculation results of the shear strength increase were obtained using deformation bundle models: RBM2 (RBMw) or mRBM1. RBM2 model considers the variability of strength characteristics of soils described by Weibull survival function and in most cases gives the lowest values of the shear strength increase, which usually constitute 50% of the values of shear strength increase determined using classic Wu-Waldron model. Whereas the second model (mRBM1.) considers averaged values of roots strength parameters as well as the possibility that two main mechanism of destruction of a root bundle - rupture and pulling out - can occur at the same. time. The values of shear strength increase calculated using this model were the lowest in case of beech and hornbeam roots, which had high tensile strength. It indicates that in the surface part of the profile (down to 0.2 m below the ground level), primarily in case of deciduous trees, the main mechanism of failure of the root bundle will be pulling out. However, this model requires the knowledge of a much greater number of geometrical parameters of roots and geotechnical parameters of soil, and additionally it is very sensitive to input data. Therefore, it seems practical to use the RBM2 model to assess the influence of roots on the soil shear strength increase, and in order to obtain safe results of calculations in the surface part of the profile, the Weibull shape coefficient equal to 1.0 can be assumed. On the other hand, the Wu-Waldron model can be used for the initial assessment of the shear strength increase of soil reinforced with roots in the situation, where the deformation properties of the root system and its interaction with the soil are not considered, although the values of the shear strength increase calculated using this model should be corrected and reduced by half. Test results indicate that in terms of slope stability the root systems of beech and hornbeam have the most favourable properties - their maximum effect of soil reinforcement in the profile to the depth of 0.5 m does not usually exceed 30 kPa, and to the depth of 1 m - 20 kPa. The root systems of conifers have the least impact on the slope reinforcement, usually increasing the soil shear strength by less than 5 kPa. These values coincide to a large extent with the range of shear strength increase obtained from the direct shear test as well as results of stability analysis given in literature and carried out as part of this work. The analysis of the literature indicates that the methods of measuring tree's root systems as well as their interpretation are very different, which often limits the possibilities of comparing test results. This indicates the need to systematize this type of tests and for this purpose a root distribution model (RDM) can be used, which can be integrated with any deformation bundle model (RBM). A combination of these two calculation models allows the range of soil reinforcement around trees to be determined and this information might be used in practice, while planning bioengineering procedures in areas exposed to surface mass movements. The functionality of this solution can be increased by considering the dynamics of plant develop¬ment in the calculations. This, however, requires conducting this type of research in order to obtain more data.
Book chapters on the topic "Maximum Tension"
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Sakata, Toshio, Toshio Sumi, and Mitsuhiro Miyazaki. "Maximal Ranks." In Algebraic and Computational Aspects of Real Tensor Ranks, 39–59. Tokyo: Springer Japan, 2016. http://dx.doi.org/10.1007/978-4-431-55459-2_5.
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Zhang, Yue, Yu-Jong Tzeng, and Eugene Zhang. "Maximum Number of Degenerate Curves in 3D Linear Tensor Fields." In Mathematics and Visualization, 221–34. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-44684-4_13.
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Zhang, Yue, Lawrence Roy, Ritesh Sharma, and Eugene Zhang. "Maximum Number of Transition Points in 3D Linear Symmetric Tensor Fields." In Mathematics and Visualization, 237–50. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-43036-8_15.
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Ou, Yeong-Jeong, and Lung-Wen Tsai. "Design of a Three-dof Tendon-driven Manipulator with the Characteristics of Equal Maximum Tensions." In Advances in Robot Kinematics and Computational Geometry, 369–78. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-015-8348-0_37.
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Hagberg, S., A. Rubenson, U. Sillén, and K. Werkmäster. "Management of Long-gap Esophagus: Experience with End-to-End Anastomosis Under Maximal Tension." In Long-gap Esophageal Atresia, 88–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-70777-3_8.
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Daniyan, Ilesanmi, Khumbulani Mpofu, Bankole Oladapo, and Rufus Ajetomobi. "Modelling and Simulation of Automated Hydraulic Press Brake." In Lecture Notes in Mechanical Engineering, 64–78. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-18326-3_7.
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AbstractIn this study, a reconfigurable hydraulic press brake was designed using Solidworks and simulated on a hydraulic Automation Studio Fluidsim. The designed press brake comprises of the frame balance, conveyor rollers and support, belt, chuck, six hydraulic cylinders assembled with bolts and nuts. The buckling force was determined analytically and compared with the Finite Element Analysis (FEA) simulation to prevent distortion of length and section. The Von mises stress theory was used to determine the stress, resultant load and displacement. The results obtained from the FEA simulation were compared with the mechanical properties of the hydraulic press brake. The maximum stress induced is significantly lower than the tensile strength of the hydraulic press brake. Hence, the stress induced due to bending cannot cause the cast alloy to yield. Also, the buckling force significantly exceeds the resultant force giving no chances for buckling. The designed hydraulic press brake is flexible enough to control using hydraulic cylinders and enhances sufficient strength and rigidity during clamping and loading conditions.
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Merlet, Jean-Pierre. "Maximal Cable Tensions of a N-1 Cable-Driven Parallel Robot with Elastic or Ideal Cables." In Mechanisms and Machine Science, 79–89. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75789-2_7.
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Singh, Manohar, and Pushpendra S. Bharti. "Identification of Process Parameter Combination for Maximum Tensile Strength in 3D Printed Polylactic Acid Specimens Using Regression and ANOVA." In Lecture Notes in Mechanical Engineering, 217–25. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-1618-2_21.
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Thomsen, A. R., M. R. Saalmann, N. H. Nicolay, A. L. Grosu, and Peter Vaupel. "Temperature Profiles and Oxygenation Status in Human Skin and Subcutis Upon Thermography-Controlled wIRA-Hyperthermia." In Water-filtered Infrared A (wIRA) Irradiation, 69–80. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-92880-3_5.
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AbstractEfficacy of wIRA immediately followed by hypofractionated radiation in the treatment of locally recurrent breast cancer and other superficial tumors is documented. A prerequisite for the additive and synergistic radiosensitizing properties of hyperthermia is the assessment of resulting temperatures of tumors and normal tissues. To assess the role of hyperthermia in reversing tumor hypoxia through its effects on local blood flow, oxygen profiles in skin, subcutis, and superficial tumors have been additionally assessed during mild hyperthermia (39–43 °C).Upon wIRA-exposure, skin surface temperatures increased from 35 to 41.6 °C within 5–12 min. Maximum temperatures of 42 °C were found in subepidermal regions, with a steady decline in deeper layers reaching 40.1 °C at a depth of 20 mm. Heating was accompanied by increases in tissue oxygen tensions. Effective hyperthermia levels (≥ 39 °C) were established in depths up to 25 mm. Following wIRA exposure, tissue temperatures returned to pretreatment levels within a few minutes, with the decay time depending on tissue depths, while pO2 values remained on therapeutical levels for 30–60 min postheat, outlasting the period needed for subsequent radiotherapy. Monitoring in the upper dermis layer of skin and recurrent breast cancers confirmed the improved O2 status during wIRA exposure and outlasted the time needed for subsequent radiotherapy.
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Zakariyah, Luqman. "Islamic Legal Maxims for Attainment of Maqasid-al-Shari‘ah in Criminal Law: Reflections on the Implications for Muslim Women in the Tension Between Shari‘ah and Western Law." In Women in Islam, 117–34. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-4219-2_9.
Full textConference papers on the topic "Maximum Tension"
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von Toussaint, U., S. Gori, Ali Mohammad-Djafari, Jean-François Bercher, and Pierre Bessiére. "DIGITAL PARTICLE IMAGE VELOCIMETRY USING SPLINES IN TENSION." In BAYESIAN INFERENCE AND MAXIMUM ENTROPY METHODS IN SCIENCE AND ENGINEERING: Proceedings of the 30th International Workshop on Bayesian Inference and Maximum Entropy Methods in Science and Engineering. AIP, 2011. http://dx.doi.org/10.1063/1.3573635.
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Sun, L., R. Wada, and K. Takagi. "Maximum Mooring Tension Estimation of External Turret Moored FLNG." In 2018 OCEANS - MTS/IEEE Kobe Techno-Ocean (OTO). IEEE, 2018. http://dx.doi.org/10.1109/oceanskobe.2018.8559058.
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Lee, Ki Bang, Firas Sammoura, and Liwei Lin. "Surface Tension Propelled Microboats." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-60680.
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The operation of autonomous, liquid-fueled microboats driven by surface tension effects has been demonstrated, including the possibility of controlled steering. Two types of microboat with surface area of 6 × 11 mm2 have been fabricated by a bulk micromachining process and powered by 0.5μl of isopropanol on top of a pool of water. The first microboat design uses a cellulose film to store liquid-fuel and has been able to operate for 10 minutes with a maximum cruising velocity of 7.5cm/sec. The second microboat design uses a direct fueling system by adding a fuel droplet directly and has been able to cruise for about 30 seconds with a maximum velocity of 15cm/sec. A first-order theoretical model was developed that captures the discharging trend of the liquid-fuel and the surface tension effects. Numerical techniques were employed to find out the velocity profile of the microboat and compared with experimental results. Moreover, an onboard steerer has been added and successfully restrained the motion of the microboat into a desired path. When integrated with other microsystems, microboats could be used for future applications such as marine life observations or military surveillance/reconnaissance missions.
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Hermawan, A. Rudi, Eka Sasmita Mulya, and Sarito. "Analysis of Precast Hybrid Concrete Beam with Lightweight Concrete at Tension Maximum." In Annual Southeast Asian International Seminar. SCITEPRESS - Science and Technology Publications, 2020. http://dx.doi.org/10.5220/0010507500050008.
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Roosen, Marco A., Max A. N. Hendriks, Yuguang Yang, Cor van der Veen, and Dick Schaafsma. "Resistance of prestressed bridge girders to diagonal tension cracking." In IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/ghent.2021.0819.
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<p>Diagonal tension cracking is the governing failure mode for bridge girders with a thin web that are highly prestressed and contain little shear reinforcement. When assessing existing bridge girders using the Eurocode 2 [1], it often turns out that it is not possible to demonstrate sufficient resistance to diagonal tension cracking. This paper evaluates the method to determine the maximum principal tensile stresses as used in the Eurocode 2 [1] and investigates how flexural cracks affect the principle tensile stresses in the regions without flexural cracks. This paper also investigates how the tensile strength of the web is affected by the presence of compressive stresses and by the size of the area subjected to high tensile stresses. Based on the results of these investigations, an improved model is proposed to determine the resistance to diagonal tension cracking.</p>
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Roosen, Marco A., Max A. N. Hendriks, Yuguang Yang, Cor van der Veen, and Dick Schaafsma. "Resistance of prestressed bridge girders to diagonal tension cracking." In IABSE Congress, Ghent 2021: Structural Engineering for Future Societal Needs. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/ghent.2021.0819.
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<p>Diagonal tension cracking is the governing failure mode for bridge girders with a thin web that are highly prestressed and contain little shear reinforcement. When assessing existing bridge girders using the Eurocode 2 [1], it often turns out that it is not possible to demonstrate sufficient resistance to diagonal tension cracking. This paper evaluates the method to determine the maximum principal tensile stresses as used in the Eurocode 2 [1] and investigates how flexural cracks affect the principle tensile stresses in the regions without flexural cracks. This paper also investigates how the tensile strength of the web is affected by the presence of compressive stresses and by the size of the area subjected to high tensile stresses. Based on the results of these investigations, an improved model is proposed to determine the resistance to diagonal tension cracking.</p>
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Metwalli, Sayed M., M. Alaa Radwan, and Abdel Aziz M. Elmeligy. "Optimization of Helical Compression and Tension Springs." In ASME 1993 Design Technical Conferences. American Society of Mechanical Engineers, 1993. http://dx.doi.org/10.1115/detc1993-0423.
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Abstract The primary objective of spring design is to obtain a spring which will do the required job and at the same time be the most economical for a given application. This means that the spring must fit into the available space and has a satisfactory life in service. The optimum springs would then have minimum weight, minimum length or minimum space. Various optimum values of wire diameter and spring index are obtained. These are evaluated in a closed form or utilizing iterative search techniques. The problem is formulated with and without the variation of the maximum shear stress with the wire diameter. The optimal parameters are also normalized and plotted.
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Tsuji, Hirokazu, and Kazuo Maruyama. "Estimation of Yield Clamping Force Based on Rigid-Plastic Model." In ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-1195.
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Abstract Yield clamping force of a bolt in plastic region tightening depends on yield point load of the bolt under combined loads of axial tension and thread torque induced by the tightening process. A new estimation method using interaction curve for yield is proposed, which is applied to the yield clamping force and maximum additional tension under external force. This estimation method utilizes the general yield criterion based on the rigid-plastic solution for combined loads of tension and torsion. The yield of the bolt is expressed by the point of the intersection between the interaction curve and loading path of the bolt in tightening or external loading. Considering the coefficient of friction at the flank of the thread and the residual thread torque after tightening, yield clamping force and maximum additional tension are obtained respectively by the simple formulas. The yield clamping force and the maximum additional tension of the bolt are examined experimentally by a combined load testing machine which can apply combined tensile and torsional loads on the threaded portion of the bolt. Estimated values by the proposed method shows good agreement with the experimental results. The proposed estimation method is superior to the conventional one which takes into account only the local yield criterion. Finally, the target zones of initial clamping force controlled by elastic region tightening, yield point tightening and plastic region tightening are examined. Usefulness of the yield clamping force is demonstrated based on the rigid-plastic model.
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Xu, Sheng, C. Guedes Soares, and Ângelo P. Teixeira. "Reliability Analysis of Short Term Mooring Tension of a Semi-Submersible System." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-78751.
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A detail procedure to study mooring line strength reliability is presented. A fully coupled analysis is carried out to get the mooring tensions of a deep water semi-submersible floating systems operated in 100 year wave condition in South China Sea. The ACER method is applied to predict the 3h extreme mooring tension, and the results are validated by global maximum method. The hydrodynamic sampling points are generated by Latin Hypercube Sampling technique. The 3h extreme mooring tension is calculated by the ACER method with 10 minutes fully coupled dynamic simulation for each sampling point. The Kriging meta model method is trained to predict 3h mooring extreme tension under the effects of random hydrodynamic drag coefficients. A reliability analysis is carried out by implementing Monte Carlo simulation with the random hydrodynamic drag coefficients and mooring breaking strength considered.
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Zhang, Su-xia, You-gang Tang, and Hai-xiao Liu. "Study on Snap Tension in Mooring Lines of Deepwater Platform." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79881.
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Based on the theory of impact dynamics, the motion equations for a mooring line-floating body system after and before impact loading are established with consideration of the viscoelastic property of mooring lines. The factors that influence the taut-slack conditions of a mooring system are analyzed through classifying the taut-slack regions, which are defined by nondimensional ratios of displacement, frequency and damping of the system. The mooring lines of Jip spar platform is analyzed, and the snap tension characteristics of mooring lines are given, the factors that influence the maximum tension in mooring lines, including the mass of floating body, length of mooring lines, frequency and amplitude of external excitation, and pretension in mooring lines, are also analyzed through computing the dynamic response of system and parametric study. It is shown that the maximum tension increases with increase of the mass of floating body, external excitation and pretension and decreases with increase of the length of mooring lines, also, it is found that the influence of the nondimensional ratio of damping increases with increase of the pretension in mooring lines.
Reports on the topic "Maximum Tension"
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Gerth, Wayne A., and David J. Doolette. VVal-79 Maximum Permissible Tissue Tension Table for Thalmann Algorithm Support of Air Diving. Fort Belvoir, VA: Defense Technical Information Center, March 2012. http://dx.doi.org/10.21236/ada561928.
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EXPERIMENTAL STUDY ON WELDING RESIDUAL STRESS OF TWO-WAY STIFFENED STEEL PLATES. The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.531.
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The immersed tunnel of Shenzhen-Zhongshan Link Project adopts the steel shell-concrete (SSC) composite structure, in which the two-way stiffened steel plate is applied as the surface of steel shell. Since the steel plate stiffened in two-way, the residual stresses could be induced in the complicated welds at the intersections of plates and stiffeners. Therefore, residual stress experimental study on two full-scale specimen of the two-way stiffened steel plate, based on the steel shell details of ShenzhenZhongshan Link Project, was carried out to investigate the distribution of residual stresses by sectioning method. Results show that tensile residual stress could be measured near the welded stiffeners with a maximum of about 0.66 times the yield strength. While the compressive residual stress is between the stiffeners, with a maximum of about 0.35 times the yield strength. Furthermore, in the direction of welded T-shape stiffeners, the difference values between residual stresses of inner and outer surfaces on bottom plates is smaller than that in the direction of welded plate stiffeners, with maximum values of 0.09 times and 0.22 times the yield strength, respectively.
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STUDY ON MECHANICAL PROPERTIES OF STAINLESS STEEL PLATE SHEAR WALL STRENGTHENED BY CORRUGATED FRP. The Hong Kong Institute of Steel Construction, August 2022. http://dx.doi.org/10.18057/icass2020.p.305.
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In this paper, the mechanical properties of stainless steel plate shear walls reinforced with fiber reinforced polymer (FRP) of corrugated sections were studied. Two scaled FRP-stainless steel plate shear wall specimens were designed and subjected to the monotonic horizontal load. FRPs in the form of corrugated and flat sections were respectively used to reinforce the embedded steel plates of the steel plate shear wall. The test results show that the failure mode of flat FRP reinforced steel plate shear wall is mainly the peeling of the FRP, while the failure mode of corrugated FRP reinforced steel plate shear wall is mainly the tensile fracture of the FRP. The out-of-plane deformation of steel plate reinforced with corrugated FRP can be effectively restrained. The maximum bearing capacity of the two specimens is 97.96 kN and 106.32 kN respectively. The yield load of the specimen with corrugated FRP is increased by 16.5%, the ultimate bearing capacity is increased by 9.3% and the stiffness is increased by 68%.
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LOW-CYCLE FATIGUE PROPERTIES OF AUSTENITIC STAINLESS STEEL S30408 UNDER LARGE PLASTIC STRAIN AMPLITUDE. The Hong Kong Institute of Steel Construction, March 2022. http://dx.doi.org/10.18057/ijasc.2022.18.1.10.
Full textAbstract:
The application of stainless steel materials in civil structures for seismic protection lies in its low-cycle fatigue characteristic. However, the data of existing research are mainly based on the low-cycle fatigue in small strain amplitudes. To this end, we perform low-cycle fatigue testing of Austenitic stainless steel S30408, which has low yield point and good elongation performance, under the cyclic load with a maximum strain amplitude reaching up to 5%, to fill the gap. The stress-strain response characteristics of the stainless steel material under the cyclic load are analyzed; then, the parameters of the strain-fatigue life relationship and the cyclic-plastic constitutive model used for FEA simulation are extracted. Results show that the stainless steel’s stress-strain curve is nonlinear without a yield plateau, thus presenting a high strength yield ratio and ductility. The hysteresis loops of the material are plump with a shuttle shape and are symmetric to the origin, indicating a fine energy dissipation capacity. The skeleton curve under cyclic loading with cyclic hardening can be significantly reflected by the Ramberg Osgood model, which is affected by the strain amplitude and loading history; it is also different from the monotonic tensile skeleton curve. The strain-fatigue life curve fitted by the Baqusin Manson Coffin model can predict the materials’ fatigue life under different strain amplitudes. The mixed hardening model, including isotropic and kinematic hardening, based on the Chaboche model, is able to simulate the cyclic stress-strain relationship. Further, its parameters can provide basic data information for the seismic design of civil structures when Austenitic stainless steel S30408 is used.