Relevant bibliographies by topics / Design stresses

Academic literature on the topic 'Design stresses'

Author: Grafiati
Published: 10 December 2022
Last updated: 19 February 2023

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Journal articles on the topic "Design stresses"

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Pargaonkar, C. S., and Maneesh Batrani. "Expansion Joint Design, Manufacture and Testing for Large Capacity Steam Turbines." Applied Mechanics and Materials 592-594 (July 2014): 1539–43. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.1539.

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The rapidly growing trend for higher capacity steam turbines with large steam flows demand the use of long lengths and large size pipes. Thermal expansions of up-to 50mm and pipe diameters up-to 2600mm are required to be dealt with calling for the use of Expansion Joints to control the stresses in both the pipes as well as the end equipment. The bellows in the Expansion Joints used for the steam turbine application are stretched to their limiting values of the stresses in order to make them as flexible as possible with the aim of limiting the pipe and end equipment operational stresses. Three fundamental types of loading are presented to provide insight into the way bellows convolutions are stressed during operation. The optimization of the bellows profile geometry is discussed briefly. A comparison of the resulsts obtainied by proven computational methods as well as by using international EJMA standard is made to highlight the safety built in the well established methods used.
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Sandström, Rolf, and Bo Ivarsson. "Influence of scatter in yield stresses on design stresses at elevated temperature." Materials & Design 7, no. 2 (March 1986): 95–100. http://dx.doi.org/10.1016/s0261-3069(86)80008-5.

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VOGLER, FALKO, and PETER GROCHE. "CRITERIA FOR TOOL DESIGN IN HYDROFORMING." Journal of Advanced Manufacturing Systems 07, no. 01 (June 2008): 171–74. http://dx.doi.org/10.1142/s0219686708001309.

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Closing forces and internal pressure lead to stresses and strains in hydroforming dies. The deflection of the die influences the accuracy of the hydroformed products. The influence of the die geometry on stresses and strains in the die is being examined fundamentally. Additionally, the location of the closing force transmission is discovered to be crucial. The objectives of this research were to determine the demands on the hydroforming die and to reduce failure-critical stresses.
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Zhao, Yuan Qin. "Study on Materials Flow Destruction Causes to the Shape Change with New Method of Proving a Specific Energy Theory." Advanced Materials Research 675 (March 2013): 169–71. http://dx.doi.org/10.4028/www.scientific.net/amr.675.169.

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The three principal stresses of unit body correspond to the three circles of stress. Each circle of stress corresponds to one of the biggest shear stresses. Each of the biggest shear stresses corresponds to a shear stress’s specific energy. Therefore, specific energy of unit body is solved. It is compared with specific energy of shear stress, staying a dimensional state of stresses with materials flow destruction. And people can get a common formula about specific energy theory of the shape change during the engineering design. The new method’s proving process is very simple, and the nature of failure mechanism is clearer.
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Keste, Appasaheb Adappa, Shravan Haribhau Gawande, and Chandrani Sarkar. "Design optimization of precision casting for residual stress reduction." Journal of Computational Design and Engineering 3, no. 2 (November 6, 2015): 140–50. http://dx.doi.org/10.1016/j.jcde.2015.10.003.

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Abstract Normally all manufacturing and fabrication processes introduce residual stresses in a component. These stresses exist even after all service or external loads have been removed. Residual stresses have been studied elaborately in the past and even in depth research have been done to determine their magnitude and distribution during different manufacturing processes. But very few works have dealt with the study of residual stresses formation during the casting process. Even though these stresses are less in magnitude, they still result in crack formation and subsequent failure in later phases of the component usage. In this work, the residual stresses developed in a shifter during casting process are first determined by finite element analysis using ANSYS® Mechanical APDL, Release 12.0 software. Initially the analysis was done on a simple block to determine the optimum element size and boundary conditions. With these values, the actual shifter component was analyzed. All these simulations are done in an uncoupled thermal and structural environment. The results showed the areas of maximum residual stress. This was followed by the geometrical optimization of the cast part for minimum residual stresses. The resulting shape gave lesser and more evenly distributed residual stresses. Crack compliance method was used to experimentally determine the residual stresses in the modified cast part. The results obtained from the measurements are verified by finite element analysis findings. Highlights This paper focus on analytical, numerical and experimental design optimization of shifter. Performed design optimization by finite element analysis and experimental of live industrial problem. The results can applicable as a basis of design and optimization of new type of the automotive parts. The results of the current work present the actual behavior of induced stresses.
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Belabed, Youssouf, Bachir Kerboua, and Mostapha Tarfaoui. "New design for reducing interfacial stresses of reinforced structures with FRP plates." International Journal of Building Pathology and Adaptation 37, no. 2 (April 8, 2019): 196–207. http://dx.doi.org/10.1108/ijbpa-09-2018-0073.

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Purpose The sustainability of the structures is not only a technical goal, but also a matter of social and environmental values. This requires the researchers to use very rigid, highly durable and corrosion-resistant composite structures in order to achieve the technical, environmental and social goals. The purpose of this paper is to present an original work on reducing the interfacial stresses of bonded structures with fibre-reinforced polymers (FRP) plates based on new taper design. Design/methodology/approach In this proposed concept, the effect of combined taper is investigated on reducing interfacial stresses, attempting to enhance the structure performance and address the debonding problem that comes with reinforcing techniques. This research is carried out by using finite element analysis, incorporating many new parameters. Findings As a result, a new solution is discovered that combined taper in both adhesive layer and composite laminate, which significantly reduces the interfacial stresses at the end of the FRP plate. Additionally, a parametric study is carried out in order to determine the optimal configurations of taper dimensions as well as other parameters that influence the stress concentration distribution at the edge of the adherends. Practical implications This new design regarding the reduction of interfacial stresses will help in increasing the lifespan of damaged structures reinforced by FRP composites, preserving thus its technical, historical and social values. Originality/value The paper uses straight, concave and convex fillets with inverse taper as a new design solution with new parameters including thermo-mechanical loads and pre-stressed FRP plate with multi-layer, fibre orientation and shear-lag effects.
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Mešić, Elmedin, Enis Muratović, Lejla Redžepagić-Vražalica, Nedim Pervan, Adis J. Muminović, Muamer Delić, and Mirza Glušac. "Experimental & FEM Analysis of Orthodontic Mini-Implant Design on Primary Stability." Applied Sciences 11, no. 12 (June 12, 2021): 5461. http://dx.doi.org/10.3390/app11125461.

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The main objective of this research is to establish a connection between orthodontic mini-implant design, pull-out force and primary stability by comparing two commercial mini-implants or temporary anchorage devices, Tomas®-pin and Perfect Anchor. Mini-implant geometric analysis and quantification of bone characteristics are performed, whereupon experimental in vitro pull-out test is conducted. With the use of the CATIA (Computer Aided Three-dimensional Interactive Application) CAD (Computer Aided Design)/CAM (Computer Aided Manufacturing)/CAE (Computer Aided Engineering) system, 3D (Three-dimensional) geometric models of mini-implants and bone segments are created. Afterwards, those same models are imported into Abaqus software, where finite element models are generated with a special focus on material properties, boundary conditions and interactions. FEM (Finite Element Method) analysis is used to simulate the pull-out test. Then, the results of the structural analysis are compared with the experimental results. The FEM analysis results contain information about maximum stresses on implant–bone system caused due to the pull-out force. It is determined that the core diameter of a screw thread and conicity are the main factors of the mini-implant design that have a direct impact on primary stability. Additionally, stresses generated on the Tomas®-pin model are lower than stresses on Perfect Anchor, even though Tomas®-pin endures greater pull-out forces, the implant system with implemented Tomas®-pin still represents a more stressed system due to the uniform distribution of stresses with bigger values.
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Ayoub, Mai, Mohamed EL-Anwar, and Mazen I. Negm. "Arthroscopic Suture Anchor Design Finite Element Study." Open Access Macedonian Journal of Medical Sciences 9, A (July 22, 2021): 562–66. http://dx.doi.org/10.3889/oamjms.2021.6409.

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AIM: This in-vitro study investigated arthroscopic suture anchors’ main design parameters effect on surrounding bone. METHODS: Thirty-dimensional arthroscopic suture anchor designs’ models were created on engineering CAD software by changing thread profile, pitch, and anchor tip profile as design parameters. These models were imported into ANSYS Workbench for finite element analysis. Bone was simplified and modeled as two coaxial cylinders. Tensile vertical load of 300 N, and oblique at 45º to the vertical axis, were applied to each model as two loading conditions while the simplified bone base was fixed in place as a boundary condition. RESULTS: The finite element analyses on all models under both loading conditions showed stresses within physiological limits on bone. Trapezoidal teeth and inclined cut teeth designs showed the lowest values of stresses and deformations respectively on the bone under oblique loads, while curved tooth and square tooth designs showed the lowest values of stresses and deformations respectively on the bone under vertical loads. General ascending or descending trend was recorded by increasing pitch from 1.2 to 1.5 to 1.8 mm on the total deformation and maximum Von Mises stress on bone and anchor body. Tapered tip slightly increased bone and anchor stresses. CONCLUSION: Arthroscopic anchors thread profile has minor affect on cortical bone behavior. Trapezoidal teeth, square tooth, and inclined cut teeth profiles showed the lowest values of stresses and deformations on cortical bone. Increasing thread pitch of arthroscopic suture anchors increases or decreases stress on the bone, and anchor body according to thread profile edges. Anchor tip profile negligibly affects both deformations and stresses on bone and anchor body.
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Rocha, L. A. O., S. Lorente, and A. Bejan. "Vascular design for reducing hot spots and stresses." Journal of Applied Physics 115, no. 17 (May 7, 2014): 174904. http://dx.doi.org/10.1063/1.4874220.

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Jobson, D. A. "Asymptotic and reference stresses for design by analysis." Nuclear Engineering and Design 98, no. 3 (January 1987): 395–400. http://dx.doi.org/10.1016/0029-5493(87)90018-5.

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Dissertations / Theses on the topic "Design stresses"

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Parvizian, Jamshid. "Shape design optimization using boundary elements." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267165.

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Bond, Andrew John. "Behaviour of displacement piles in overconsolidated clays." Thesis, Imperial College London, 1989. http://hdl.handle.net/10044/1/7781.

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Quan, Yuyun 1973. "Finite element analysis of tumbling mill design and operating effects on liner bolt stresses, liner stresses and mill resonance." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=99012.

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Tumbling mills describe a class of mechanical systems defined by a cylindrical chamber filled with balls and/or rocks that rotate around their own longitudinal axis. Due to the action of charges, the lifters/liners wear significantly and their shape will be changed which will influence the efficiency of the mill. Liner bolts are the mill components which connect the mill interior with the exterior environment. With this property, bolts have been paid more and more attention. The first part of the thesis covers the structural analysis of the lifter/liner bolts, and the possibility for on-line charge motion measurement with the aid of bolts is discussed by comparing the strain distributions at the bolt areas where the bolts occupy different mill circumferential positions. In order to measure the lifter/liner wear, a real-time, on-line wear sensor was developed by the Comminution Dynamics Laboratory. However, the positioning of the sensor/sensors affects the strength of the mill is unknown. The second part of the project provides detailed research on this issue by FEA analysis so as to provide a basis for the practical application of this kind of sensors. Finally, during the grinding process of tumbling mills, some mills can vibrate greatly at some ranges of mill rotating speeds and as a result the mills cannot work properly because of this vibration or resonance. With six different mill models, the final part of the thesis investigates the mill natural frequencies and their modes by FEA and furthermore, explores the effect of mill diameter, length on these frequencies and modes.
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Hanna, Carl Robert. "Engineering Residual Stress into the Workpiece through the Design of Machining Process Parameters." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19813.

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The surface integrity of a machined component that meets the demands of a specific application requirement is defined by several characteristics. The residual stress profile into the component is often considered as the critical characteristics as it carries a direct effect on the fatigue life of a machined component. A significant amount of effort has been dedicated by researchers to predict post process stress in a workpiece using analytical, experimental, and numerical modeling methods. Nonetheless, no methodology is available that can express the cutting process parameters and tool geometry parameters as functions of machined residual stress profile to allow process planning in achieving desired residual stress profile. This research seeks to fill that void by developing a novel approach to enable the extraction of cutting process and tool geometry parameters from a desired or required residual stress profile. More specifically, the model consists in determining the depth of cut, the tool edge radius and the cutting forces needed to obtain a prescribed residual stress profile for an orthogonal machining operation. The model is based on the inverse solution of a physics-based modeling approach of the orthogonal machining operation and the inverse solution of the residual stress prediction from Hertzian stresses. Experimental and modeling data are used to validate the developed model. The work constitutes a novel approach in engineering residual stress in a machined component.
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JEFFREY, ROBERT GRAHAM JR. "ROCKBOLT ANALYSIS FOR REINFORCEMENT AND DESIGN IN LAYERED ROCK (COMPOSITE)." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/187982.

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The displacements and stresses in layered rock above underground openings can be calculated using a beam model for the rock layers. The traditional approach assumes that interfaces between layers are frictionless and layers can slip past one another freely as they deflect. In contrast, the design of structural laminated beams has traditionally been based on the assumption that the interfaces between layers were welded, with no slip occurring there. In this work, the theory of composite laminated beams, which allows for partial slip on layer interfaces, is applied to the problem of predicting displacements and stresses in layered roof rock. The effects of rockbolt reinforcement are modeled by discrete shear and normal stiffnesses incorporated at locations in the model where the rockbolts cross layer interfaces. Published solutions and results for laminated composite beams are reviewed. Composite laminated beam theory provided a means of accounting for rockbolt reinforcement effects and provided a conceptual framework that was used to develop two FORTRAN programs; one, based on the force method of analysis, that automatically finds shear and tensile interface failures in the system, and the other a finite element program that employs beam elements, elastic interface elements, and rockbolt elements to model a rockbolted layered rock system. Published data together with results from these programs suggest that shear reinforcement may be more effective when placed near the ends of roof layers. The normal interaction between layers tends to be uniformly distributed unless rockbolt forces act on the layers or if partial delamination of layers has occurred. Both shear and normal reinforcement will cause stresses to be redistributed within the system of layers. Analysis of this redistribution of stresses requires that the sequence of interface failure be predicted which, in turn, requires that the properties of the individual layers, of the interfaces between layers, and of the rockbolts be properly taken into account. Laminated composite beam theory and programs based on this theory provide rational and efficient ways to study and analyze the behavior of layered roof rock.
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Wamelen, Arend Andries van. "Optimal design and testing of laminated specimens to evaluate competing composite failure criteria." Thesis, This resource online, 1993. http://scholar.lib.vt.edu/theses/available/etd-08042009-040517/.

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Willis, C. R. "Design of unreinforced masonry walls for out-of-plane loading /." Title page, abstract and table of contents only, 2004. http://web4.library.adelaide.edu.au/theses/09PH/09phw7342.pdf.

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Malm, Richard. "Shear cracks in concrete structures subjected to in-plane stresses." Licentiate thesis, KTH, Civil and Architectural Engineering, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4215.

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After only two years of service, extensive cracking was found in the webs of two light-rail commuter line bridges in Stockholm, the Gröndal and Alvik bridges. Due to this incident it was found necessary to study the means available for analysing shear cracking in concrete structures subjected to in-plane stresses. The aim of this PhD project is to study shear cracking with these two bridges as reference. In this thesis, the first part aims to study the possibility of using finite element analysis as a tool for predicting shear cracking for plane state stresses. The second part is concerning how the shear cracks are treated in the concrete design standards.

Shear cracking in reinforced beams has been studied with non-linear finite element analyses. In these analyses the shear cracking behaviour was compared to experiments conducted to analyse the shear failure behaviour. Finite element analyses were performed with two different FE programs Abaqus and Atena. The material model used in Atena is a smeared crack model based on damage and fracture theory with either fixed or rotated crack direction. The material model used in Abaqus is based on plasticity and damage theory. The fixed crack model in Atena and the model in Abaqus gave good results for all studied beams. For the two studied deep beams with flanges the results from the rotated crack model were almost the same as obtained with the fixed crack model. The rotated crack model in Atena gave though for some beams a rather poor estimation of the behaviour.

The calculation of crack widths of shear cracks has been studied for the long-term load case in the serviceability state for the Gröndal and Alvik bridges, with the means available in the design standards. The methods based on the crack direction corresponding to the principal stress and do not include the effect of aggregate interlocking seems to be too conservative. Two of the studied methods included the effect of aggregate interlocking, it was made either by introducing stresses in the crack plane or implicitly by changing the direction of the crack so that it no longer coincide with the direction of principal stress. For calculations based on probable load conditions, these methods gave estimations of the crack widths that were close to the ones observed at the bridges. Continuous measurements of cracks at the Gröndal and the Alvik bridges have also been included. Monitoring revealed that the strengthening work with post-tensioned tendons has, so far, been successful. It also revealed that the crack width variations after strengthening are mainly temperature dependent where the daily temperature variation creates movements ten times greater than those from a passing light-rail vehicle. Monitoring a crack between the top flange and the webs on the Gröndal Bridge showed that the top flange was moving in a longitudinal direction relative to the web until the strengthening was completed. The crack widths in the sections strengthened solely by carbon fibre laminates seem to increase due to long-term effects.

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Peter, Geoffrey J. M. "Numerical simulation of CTE mismatch and thermal-structural stresses in the design of interconnects /." Full text open access at:, 2001. http://content.ohsu.edu/u?/etd,235.

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Graesser, Douglas Lee. "Design of laminated composite panels optimized for damage tolerance /." Thesis, Connect to this title online; UW restricted, 1993. http://hdl.handle.net/1773/7080.

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Books on the topic "Design stresses"

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Barron, Randall F., and Brian R. Barron. Design for Thermal Stresses. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118093184.

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R, Barron Brian, ed. Design for thermal stresses. Hoboken, N.J: Wiley, 2011.

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Maan, Jawad. External pressure design in creep range. New York, N.Y: ASME Standards Technology, LLC, 2009.

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name, No. Design loads on structures during construction. Reston, VA: American Society of Civil Engineers, 2003.

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Huston, Ronald L. Practical stress analysis in engineering design. 3rd ed. Boca Raton: CRC/Taylor & Francis, 2009.

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Hussein, Raafat M. M. Composite panels/plates: Analysis and design. Lancaster, Pa: Technomic Pub., 1986.

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Practical stress analysis in engineering design. 2nd ed. New York: M. Dekker, 1990.

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Design of piping systems. 2nd ed. Mansfield Centre, CT: Martino Publishing, 2009.

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Practical fracture mechanics in design. New York: M. Dekker, 1996.

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Freed, Alan David. Steady-state and transient zener parameters in viscoplasticity: Drag strength versus yield strength. [Washington, DC]: National Aeronautics and Space Administration, 1990.

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Book chapters on the topic "Design stresses"

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Gaddam, Subhash Reddy. "Discontinuity Stresses." In Design of Pressure Vessels, 73–81. First edition. | Boca Raton, FL : CRC Press/Taylor & Francis Group, LLC, 2021.: CRC Press, 2020. http://dx.doi.org/10.1201/9781003091806-7.

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Gaddam, Subhash Reddy. "Local Stresses." In Design of Pressure Vessels, 83–112. First edition. | Boca Raton, FL : CRC Press/Taylor & Francis Group, LLC, 2021.: CRC Press, 2020. http://dx.doi.org/10.1201/9781003091806-8.

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Stalnaker, Judith J., and Ernest C. Harris. "Loads and Allowable Stresses." In Structural Design in Wood, 45–73. Boston, MA: Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-9996-4_4.

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Gaddam, Subhash Reddy. "Thermal Stresses and Piping Flexibility." In Design of Pressure Vessels, 113–31. First edition. | Boca Raton, FL : CRC Press/Taylor & Francis Group, LLC, 2021.: CRC Press, 2020. http://dx.doi.org/10.1201/9781003091806-9.

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Obata, Yoshihiro. "Optimal Design of Functionally Graded Materials." In Encyclopedia of Thermal Stresses, 3508–19. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_232.

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Köhler, Michael, Sven Jenne, Kurt Pötter, and Harald Zenner. "Characteristic Service Stresses." In Load Assumption for Fatigue Design of Structures and Components, 13–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-642-55248-9_2.

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Nguyen-Schäfer, Hung. "Contact Stresses in Rolling Bearings." In Computational Design of Rolling Bearings, 47–61. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-27131-6_3.

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Matisoff, Bernard S. "Mechanics of Simple Stresses." In Handbook Of Electronics Packaging Design and Engineering, 428–39. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-011-7047-5_21.

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Köhler, Michael, Sven Jenne, Kurt Pötter, and Harald Zenner. "Multiaxial Loads and Stresses." In Load Assumption for Fatigue Design of Structures and Components, 93–98. Berlin, Heidelberg: Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-642-55248-9_6.

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Suhir, Ephraim, and Ali Shakouri. "Thermal Stress in a Multi-leg Thermoelectric Module (TEM) Design." In Encyclopedia of Thermal Stresses, 5217–25. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-2739-7_1012.

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Conference papers on the topic "Design stresses"

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"Design and Manufacture of Industrially Representative Weld Mock-ups for the Quantification of Residual Stresses in a Nuclear Pressure Vessel Steel." In Residual Stresses 10. Materials Research Forum LLC, 2016. http://dx.doi.org/10.21741/9781945291173-98.

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Syngellakis, S., and A. Burke-Veliz. "Residual and cyclic stresses in automotive plain bearings." In TRIBOLOGY AND DESIGN 2012. Southampton, UK: WIT Press, 2012. http://dx.doi.org/10.2495/td120161.

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Vasilopoulos, D. "Computation of Boundary Stresses by Finite Element Post Processing." In ASME 1989 Design Technical Conferences. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/detc1989-0061.

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Abstract In the displacement formulation of the finite element method, the primary unknowns are the nodal displacements. They are automatically chosen by the computer so that the energy is minimized. Stresses are then obtained by performing numerical differentiation on the displacement field. This leads to poorer accuracy for the stresses. The stresses computed this way are also sensitive to the design of the local mesh in the area where they are computed: different meshes and element types give different results, sometimes widely varying. Moreover, the convergence of the pointwise stress values is far from monotonic. A more refined model will not necessarily improve the result. Apparent convergence of the stress values may be misleading. In this paper we implement an extraction technique that computes the stress at a boundary point by performing a mathematical postprocessing of the finite element results. The stress is expressed as a weighted average of the displacements on the boundary. This extracted value is less sensitive to the local mesh and it converges much faster than the traditional point-wise stress. Comparative results are presented for a structure of moderate complexity.
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Poperenko, L. V., and M. V. Ozerov. "Azimuthal ellipsometry of subsurface layer stresses of specular metallic ribbons." In Optical Systems Design 2005. SPIE, 2005. http://dx.doi.org/10.1117/12.625137.

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Bremner, Ron D. "Bridge stresses and design in IPM machines." In IEEE EUROCON 2009 (EUROCON). IEEE, 2009. http://dx.doi.org/10.1109/eurcon.2009.5167703.

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Suhir, Ephraim, and Sung Yi. "Predicted thermal stresses in a TSV design." In 2016 IEEE International 3D Systems Integration Conference (3DIC). IEEE, 2016. http://dx.doi.org/10.1109/3dic.2016.7969994.

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Barsanescu, Paul, Raimond Grimberg, and Petru Carlescu. "Generation of Residual Stresses in Composites." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59542.

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The paper presents a new mechanical modeling of thermal mismatch residual stresses in composites. Some equations which can be easy used in order to calculate the three-dimensional state of residual stresses in fibers and matrix, in a unidirectional composite lamina, are carried out or adopted on the basis of a composite cylinder model, developed in Theory of Elasticity. Using these equations, residual stresses developed due to differential thermal shrinkage as it cools down from the high processing temperature to the ambient temperature can be predicted.
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Huang, Liping. "Analysis of Dynamic Stress Responses in Structural Vibration." In ASME 1997 Design Engineering Technical Conferences. American Society of Mechanical Engineers, 1997. http://dx.doi.org/10.1115/detc97/vib-4238.

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Abstract This paper describes basic concepts and finite element method of dynamic stress response analysis. It provides basics of stress modal analysis and frequency response analysis. The paper defines concepts of normal mode stresses and complex stress frequency response functions for shell elements and shows that element stress responses in both time and frequency domains can be expressed as superposition of normal mode stresses. It demonstrates that element stress response solutions have the similar forms to those of node displacement responses and that normal mode stresses in stress analysis play the same role as mode shapes in normal vibration analysis.
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VELICKI, A., and D. BARKEY. "Design for the relief of thermal stresses in a large high-speed wing." In Aerospace Design Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1992. http://dx.doi.org/10.2514/6.1992-1082.

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Toloui, Mostafa, Mark Marshall, Pierce Vatterott, Peter Zhang, Ryan Lahm, Thomas Lulic, and Megan Harris. "Numerical Modeling of Vascular Stresses During Lead Extraction: Subclavian vs. Femoral." In 2020 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/dmd2020-9003.

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Abstract Transvenous lead extraction is a critical and growing technique used to treat patients with chronically implanted pacemakers and defibrillators. This procedure is commonly executed via the subclavian vein or the femoral vein. Some physicians’ experiences indicate that the femoral approach results in fewer vascular tears. This study is aimed to present a physics-based comparative assessment of intravenous mechanical stresses for chronic lead management between the two approaches. Finite Element (FE) modeling is employed to quantify the vascular stress distributions. A full 3-D model including veins, heart, fibrotic scar regions and the lead was created to simulate the different lead extraction methods. Results: (1) highest stresses are generally in the vicinity of SVC lead attachments; (2) femoral approach results in a ∼uniform distribution of stress over the scar while the subclavian approach leads to patches of concentrated high stress; (3) 2–3 times higher maximum vascular stress during subclavian; (4) insignificant maximum stress at the apex for both; (5) inverse variation of stress levels with: (i) branch-to-scar distance for SVC method; and (ii)vein wall thickness in both methods. (6) lower stress levels for scars with longer attachment lengths. The importance and effectiveness of mechanical stress analysis in risk analysis for chronic lead management is illustrated. Overall, the localized intravascular wall stress is meaningfully higher for subclavian vs. femoral extraction with same SVC shear force. This may help explain the higher rate of SVC tears when extracting from the left subclavian approach. The individual anatomy (e.g. vascular angles) is a key factor in the resulting stress and this understanding may be critical when choosing an extraction approach and future lead design.
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Reports on the topic "Design stresses"

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Sham, T. Historical Context and Perspective on Allowable Stresses and Design Parameters in ASME Section III, Division 5, Subsection HB, Subpart B. Office of Scientific and Technical Information (OSTI), March 2021. http://dx.doi.org/10.2172/1773043.

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Guy, Charles, Gozal Ben-Hayyim, Gloria Moore, Doron Holland, and Yuval Eshdat. Common Mechanisms of Response to the Stresses of High Salinity and Low Temperature and Genetic Mapping of Stress Tolerance Loci in Citrus. United States Department of Agriculture, May 1995. http://dx.doi.org/10.32747/1995.7613013.bard.

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The objectives that were outlined in our original proposal have largely been achieved or will be so by the end of the project in February 1995 with one exception; that of mapping cold tolerance loci based on the segregation of tolerance in the BC1 progeny population. Briefly, our goals were to 1) construct a densely populated linkage map of the citrus genome: 2) map loci important in cold and/or salt stress tolerance; and 3) characterize the expression of genes responsive to cold land salt stress. As can be seen by the preceding listing of accomplishments, our original objectives A and B have been realized, objective C has been partially tested, objective D has been completed, and work on objectives E and F will be completed by the end of 1995. Although we have yet to map any loci that contribute to an ability of citrus to maintain growth when irrigated with saline water, our very encouraging results from the 1993 experiment provides us with considerable hope that 1994's much more comprehensive and better controlled experiment will yield the desired results once the data has been fully analyzed. Part of our optimism derives from the findings that loci for growth are closely linked with loci associated with foliar Cl- and Na+ accumulation patterns under non-salinization conditions. In the 1994 experiment, if ion exclusion or sequestration traits are segregating in the population, the experimental design will permit their resolution. Our fortunes with respect to cold tolerance is another situation. In three attempts to quantitatively characterize cold tolerance as an LT50, the results have been too variable and the incremental differences between sensitive and tolerant too small to use for mapping. To adequately determine the LT50 requires many plants, many more than we have been able to generate in the time and space available by making cuttings from small greenhouse-grown stock plants. As it has turned out, with citrus, to prepare enough plants needed to be successful in this objective would have required extensive facilities for both growing and testing hardiness which simply were not available at University of Florida. The large populations necessary to overcome the variability we encountered was unanticipated and unforeseeable at the project's outset. In spite of the setbacks, this project, when it is finally complete will be exceedingly successful. Listing of Accomplishments During the funded interval we have accomplished the following objectives: Developed a reasonably high density linkage map for citrus - mapped the loci for two cold responsive genes that were cloned from Poncirus - mapped the loci for csa, the salt responsive gene for glutathione peroxidase, and ccr a circadian rhythm gene from citrus - identified loci that confer parental derived specific DNA methylation patterns in the Citrus X Poncirus cross - mapped 5 loci that determine shoot vigor - mapped 2 loci that influence leaf Na+ accumulation patterns under non-saline conditions in the BC1 population - mapped 3 loci that influence leaf Na+ accumulation paterns during salt sress - mapped 2 loci that control leaf Cl- accumulation patterns under non-saline conditions - mapped a locus that controls leaf Cl- accumulation patterns during salt stress Screened the BC1 population for growth reduction during salinization (controls and salinized), and cold tolerance - determined population variation for shoot/root ratio of Na+ and Cl- - determined levels for 12 inorganic nutrient elements in an effort to examine the influence of salinization on ion content with emphasis on foliar responses - collected data on ion distribution to reveal patterns of exclusion/sequestration/ accumulation - analyzed relationships between ion content and growth Characterization of gene expression in response to salt or cold stress - cloned the gene for the salt responsive protein csa, identified it as glutathione peroxidase, determined the potential target substrate from enzymatic studies - cloned two other genes responsive to salt stress, one for the citrus homologue of a Lea5, and the other for an "oleosin" like gene - cold regulated (cor) genes belonging to five hybridization classes were isolated from Poncirus, two belonged to the group 2 Lea superfamily of stress proteins, the others show no significant homology to other known sequences - the expression of csa during cold acclimation was examined, and the expression of some of the cor genes were examined in response to salt stress - the influence of salinization on cold tolerance has been examined with seedling populations - conducted protein blot studies for expression of cold stress proteins during salt stress and vice versa
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Riveros, Guillermo, Felipe Acosta, Reena Patel, and Wayne Hodo. Computational mechanics of the paddlefish rostrum. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41860.

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Purpose – The rostrum of a paddlefish provides hydrodynamic stability during feeding process in addition to detect the food using receptors that are randomly distributed in the rostrum. The exterior tissue of the rostrum covers the cartilage that surrounds the bones forming interlocking star shaped bones. Design/methodology/approach – The aim of this work is to assess the mechanical behavior of four finite element models varying the type of formulation as follows: linear-reduced integration, linear-full integration, quadratic-reduced integration and quadratic-full integration. Also presented is the load transfer mechanisms of the bone structure of the rostrum. Findings – Conclusions are based on comparison among the four models. There is no significant difference between integration orders for similar type of elements. Quadratic-reduced integration formulation resulted in lower structural stiffness compared with linear formulation as seen by higher displacements and stresses than using linearly formulated elements. It is concluded that second-order elements with reduced integration and can model accurately stress concentrations and distributions without over stiffening their general response. Originality/value – The use of advanced computational mechanics techniques to analyze the complex geometry and components of the paddlefish rostrum provides a viable avenue to gain fundamental understanding of the proper finite element formulation needed to successfully obtain the system behavior and hot spot locations.
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Hammack, E., and Morgan Johnston. Three-dimensional numerical model study of flow near a scour hole in Isle of Wight Bay near Ocean City, Maryland. Engineer Research and Development Center (U.S.), April 2022. http://dx.doi.org/10.21079/11681/43921.

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A scour hole has developed in Isle of Wight Bay near Ocean City, MD. This hole could grow to the point that nearby land developments are threatened, so channel-bed protection measures may be implemented near this scour hole. Appropriately designing those bed protection measures requires knowledge of the flow behavior in the scour hole, so a three-dimensional model study has been conducted to determine the flow behavior at the extreme flood and ebb tides present during a pre-selected month of tide cycles. Steady-state simulations of the flows during those two tide conditions have been completed. Contour plots of the flow velocity near the bed and the corresponding bed shear stresses are provided as input for the design of the bed protection measures.
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Nemat-Nasser, Sia, and Alireza Vakil-Amirkhizi. Microstructural Design for Stress Wave Energy Management. Fort Belvoir, VA: Defense Technical Information Center, April 2013. http://dx.doi.org/10.21236/ada583412.

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Heymsfield, Ernie, and Jeb Tingle. State of the practice in pavement structural design/analysis codes relevant to airfield pavement design. Engineer Research and Development Center (U.S.), May 2021. http://dx.doi.org/10.21079/11681/40542.

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An airfield pavement structure is designed to support aircraft live loads for a specified pavement design life. Computer codes are available to assist the engineer in designing an airfield pavement structure. Pavement structural design is generally a function of five criteria: the pavement structural configuration, materials, the applied loading, ambient conditions, and how pavement failure is defined. The two typical types of pavement structures, rigid and flexible, provide load support in fundamentally different ways and develop different stress distributions at the pavement – base interface. Airfield pavement structural design is unique due to the large concentrated dynamic loads that a pavement structure endures to support aircraft movements. Aircraft live loads that accompany aircraft movements are characterized in terms of the load magnitude, load area (tire-pavement contact surface), aircraft speed, movement frequency, landing gear configuration, and wheel coverage. The typical methods used for pavement structural design can be categorized into three approaches: empirical methods, analytical (closed-form) solutions, and numerical (finite element analysis) approaches. This article examines computational approaches used for airfield pavement structural design to summarize the state-of-the-practice and to identify opportunities for future advancements. United States and non-U.S. airfield pavement structural codes are reviewed in this article considering their computational methodology and intrinsic qualities.
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Olson, Gregory B., D. E. Ellis, and A. J. Freeman. Electronic-Level Design of Stress-Corrosion Resistant Alloys: Quantum Steels. Fort Belvoir, VA: Defense Technical Information Center, July 2002. http://dx.doi.org/10.21236/ada403902.

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Degroot, Morris H., and Prem K. Goel. Bayesian Design and Analysis of Accelerated Life Testing with Step Stress. Fort Belvoir, VA: Defense Technical Information Center, August 1986. http://dx.doi.org/10.21236/ada193435.

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9

E. Friedman. The Application of Reliability-Based Design Factors In Stress Corrosion Cracking Evaluations. Office of Scientific and Technical Information (OSTI), December 2001. http://dx.doi.org/10.2172/939612.

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10

White, Donald, J. Ramirez, and Karl Barth. Moment-Rotation Relationship for Unified Auto-Stress Design of Continuous-Span Bridge Beam and Girders. West Lafayette, IN: Purdue University, 1997. http://dx.doi.org/10.5703/1288284313475.

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