Дисертації з теми "Resistance maximale en traction"
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Forestier, Jean-Paul. "Caracterisation de l'interface composite de collage / attaches orthodontiques." Paris 7, 1997. http://www.theses.fr/1997PA07GA03.
Повний текст джерелаVieira, Eleno Rodrigues. "Reticulação peroxídica de compostos elastoméricos utilizados na indústria de pneus." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/108470.
Повний текст джерелаRubber compounds based on natural rubber (NR) and styrene-butadiene rubber (SBR) used on tire tread are traditionally crosslinked with sulfur. The use of peroxides and co-agents in crosslinking of these compounds is still a challenge to be achieved, considering the required viscoelastic properties which are extremely important for a good tire performance and lifetime. In this work it was evaluated the use of peroxide systems with and without co-agents as crosslinking agents for NR/SBR compounds, with the aim of evaluating the efficiency of maintaining the key properties related to the traditionally used in the manufactory of tire tread. Eleven formulations with different systems were prepared, a one as a reference. Physical properties such as hardness, density, tensile strength, tear, resilience, abrasion and compression set and the behavior of NR/SBR compounds in relation of swelling Toluene were evaluated. The dynamic mechanical properties of the NR/SBR cured compounds were analysed by DMA and RPA. The NR/SBR compounds cured with only peroxide had poorer properties when compared to the reference compound vulcanized with sulfur. On the other hand, the compounds cured with proxide/co-agents, BIS F40 plus Retilink T40 (compound 10) or plus T70A (compound 11) showed better results.The compound 10 and the reference compound (compound 1) showed similar results of tan d 60 °C and tan d 0 °C (DMA), which are correlated to rolling resistance and wet traction, respectively. The results demonstrate the possibility of using a peroxide/co-agent as a cure system in NR/SBR compound instead of a sulfur-cured compound for tire tread applications, without the loss of desirable properties, lower processing times and consequently reducing manufacturing costs.
IBOUCHICHENE, AICHE SMINA. "Contribution a la caracterisation rheologique du pmma-choc. - effets des vitesses de chargement et de la temperature sur la resistance mecanique en traction-." Paris, ENSAM, 1999. http://www.theses.fr/1999ENAM0011.
Повний текст джерелаHalfaoui, Saddek. "Contribution a l'etude de l'influence de la rugosite des subjectiles sur la resistance mecanique en traction et en fatigue de l'assemblage colle a simple recouvrement en sifflet." Paris 6, 1992. http://www.theses.fr/1992PA066502.
Повний текст джерелаVaziri, Mojgan. "Water Resistance of Scots Pine Joints Produced by Linear Friction Welding." Thesis, Nancy 1, 2011. http://www.theses.fr/2011NAN10059/document.
Повний текст джерелаWood welding is a mechanical friction process allowing the assembly of timber without any adhesives. The process consists of applying mechanical friction, under pressure, alternately to the two wood surfaces to be welded. This process can be applied to weld two flat pieces of timber, originating from the same or different tree species, and can be used in the manufacture of furniture and wood joinery. The only limitation is that the joint is not exterior-grade, but only suitable for interior joints. Exterior use, or use in an environment with varying humidity demands water resistance of the welded joints. The main objective of this thesis is to study the water resistance of the welded wood. This is complemented with special attention to non-destructive test methods such as X-ray Computed Tomography (CT-) scanning and Magnetic Resolution Imaging (MRI). The influence of welding parameters and wood properties on crack formation and crack propagation in the weldline was investigated. The influence of these parameters on weldline density and water absorption in the weldline were also studied. Investigations in this thesis are based on welded samples of Scots pine (Pinus sylvestris) of the dimensions 200 mm × 20 mm × 40 mm which were cut in the longitudinal direction of the wood grain. The tensile-shear strength of the welded Scots pine samples were determined using European standard EN 205. Different non-destructive methods such as X-ray Computed Tomography (CT-) scanning to study crack formation and propagation, and magnetic Resolution Imaging (MRI) to characterize water penetration and the distribution mechanism in welded wood were used. Solid state CPMAS 13C NMR spectrometry and X-ray microdensitometry investigations were carried out to study the mechanism of adhesion in Scots pine. These various non-destructive methods offer the advantage of non-invasive analysis and the elimination of any artifacts present due to preparation and sectioning. The most important results are summarized as follows: (1) X-ray Computed Tomography (CT-) scanning and Magnetic Resolution Imaging (MRI) are versatile research methods applicable to investigations of welded woods. (2) Water resistance of welded Scots pine can be increased using heartwood, a welding pressure of 1.3 MPa, and a welding time of 1.5 s. (3) Optimization tests showed that the tensile-shear strength of Scots pine was more sensitive to welding time changes than holding time and could be optimized to more than 9.7 MPa using 1.3 MPa welding pressure, > 3.5 s welding time, and < 60 s holding time. (4) Changing welding parameters and wood properties can increase water resistance of welded wood to some extent, but treating the weldline with certain natural and environmentally-friendly water repellents is still necessary. (5) Welded Scots pine shows unusually high water resistance and tensile-shear strength. This may be explained by there being more extractives compounds in Scots pine. (6) MRI experiments showed that the origin of the joint failure in welded beech is poor water resistance of the weldline, while swelling and shrinkage of wood are the main reasons for joint failure of welded Scots pine. (7) Extractives in Scots pine dramatically improve water resistance of the welded joint, but not to a level to classify the joint as an unprotected exterior grade. However, it can qualify as a joint for protected semi-exterior application
Palhari, Juliano. "Avaliação da resistência à tração de botões ortodônticos, com diferentes sistemas adesivos, com e sem contaminação com sangue." Universidade de Taubaté, 2007. http://www.bdtd.unitau.br/tedesimplificado/tde_busca/arquivo.php?codArquivo=480.
Повний текст джерелаThe objective of this work was to evaluate the tensile strenght of orthodontic buttons settled in bovine enamel, using three systems adhesive, with and without contamination with human blood. Ninety bovine incisors had been selected in which stainless steel buttons had been fixed with base of the 3,5 mm of diameter, using themselves adhesive systems Magic Bond (Vigodent) and resin TPH (Dentisply), Fill Magic Ortoodôntico (Vigodente) and adhesive Transbond Plus Self Etching Primer (3M) and resin TPH. For each adhesive system 15 specimens had been glue after contamination of the area with human blood and 15 without contamination (control), resulting in six groups. After glue, the buttons had been submitted the assays tractive until displacement of the same and the results had been transformed for MPa. The gotten data had been analyzed for statistics (p 0,05) using analysis of variance to a criterion (ANOVA) and test of Tuckey. To compare the groups contaminated with blood with the controls Test t of Student was used. The tensile strenght gotten (MPa), considering the values found in the studied groups had occurred in the following order: Adhesive Transbond Plus Self Etching Primer and resin TPH without (2,66 1.41) and with contamination (2,29 1.11); Adhesive Magic Bond and resin TPH without (2,23 0,94) and with contamination (1,68 0,78); e, Adhesive Fill Magic Orthodôntico without (1,20 0,34) and with contamination (0.51 0,37). It had greater tensile strenght in the buttons settled without contamination and had occurred significant statistics differences between the different used adhesive systems.
Солових, Є. К., А. А. Тихий, С. Є. Катеринич, Y. Solovykh, A. Tykhyi та S. Katerynych. "Вплив реологічних властивостей, прилеглого до різального елементу робочого органу шару ґрунту, на механізм його обробітку". Thesis, Baltija Pubiishing, 2017. http://dspace.kntu.kr.ua/jspui/handle/123456789/7739.
Повний текст джерелаXIAO, JIAYU. "Etude de la prevision de la resistance a la rupture et des mecanismes d'endommagement en traction monotone et cyclique des stratifies composites non tisses et tisses contenant des trous circulaires." Paris, CNAM, 1992. http://www.theses.fr/1992CNAM0142.
Повний текст джерелаHakem, Naoual. "Etude de l'interaction des dommages de fatigue et de deformation progressive : effet d'un chargement primaire (entraction) sur la resistance a la fatigue oligocyclique en torsion de l'acier 304l a temperature ambiante." Paris 6, 1987. http://www.theses.fr/1987PA066422.
Повний текст джерелаFanton, Fabrício. "Análise de estruturas aeronáuticas reforçadas por doublers colados." [s.n.], 2012. http://repositorio.unicamp.br/jspui/handle/REPOSIP/265083.
Повний текст джерелаDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecânica
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Resumo: Na indústria aeronáutica o uso de juntas coladas, rebitadas, parafusadas e soldadas na união de partes estruturais é de extrema importância no projeto das aeronaves. No entanto, devido as suas vantagens, as juntas coladas representam uma das principais tecnologias disponíveis para a exploração de novos materiais e para o desenvolvimento de projetos inovadores de configurações estruturais. Atualmente muitas aplicações aeronáuticas de colagem estão em estruturas e peças secundárias, contudo esta tecnologia apresenta grandes potenciais que dependem de um processo robusto e do domínio do dimensionamento e certificação. A colagem de chapas adicionais, chamadas de doublers, em áreas mais críticas de fuselagem e asa conduz à redução de usinagem química e mecânica, provendo um melhor aproveitamento dos materiais. Portanto, o doubler colado é uma alternativa de junta bastante eficaz em substituição às outras alternativas presentes hoje na indústria aeronáutica, promovendo uma maior eficiência na transferência de carga, potencial de redução de custo, alta resistência à corrosão e à fadiga, característica de retardar a propagação de trincas e maior integração das peças. Desta maneira, este trabalho tem como objetivo estudar estruturas aeronáuticas metálicas reforçadas por doublers colados, usando modelos analíticos, numéricos e experimentais, com ênfase na análise de tensões do adesivo. Além disso, criou-se um software com interface amigável reunindo os modelos analíticos mais importantes na análise de doublers colados e o modelo analítico criado pelo autor deste trabalho, permitindo a comparação das tensões no adesivo com os modelos numéricos. Na parte experimental, por tratar-se de um estudo relativamente novo e sem normalização específica de ensaios disponíveis, foram desenvolvidas técnicas de análise com o uso do processamento digital de imagens e da extensometria, além do projeto dos corpos de prova. Foram também projetados e ensaiados subcomponentes utilizados para simular as aplicações reais de doublers colados, através do desenvolvimento de uma ferramenta de otimização paramétrica visando à redução do peso nas aeronaves
Abstract: In the aircraft industry the use of bonded, riveted, bolted and welded joints at the junction of structural parts are extremely important in aircraft design. However, due their advantages, bonded joints, represent one of the main technologies available for the exploration of new materials and to the development of innovative structural configurations. Nowadays several aircraft bonded applications are applied in structures and secondary parts, however, this kind of technology presents a huge potential that depends on a robust model, in an effective sizing process and in an accurate certification. The bonding process of additional plates, best-known as doublers, in critical fuselage areas and in wings lead to a reduction in chemical and mechanical machining, providing a better material use. Thus, to avoid chemical milling, in some critical areas of the fuselage, are installed additional plates. These plates are called doublers, and are bonded in the base plate as a reinforcement located to reduce the stress level. Therefore, the use of bonded doublers is a very effective alternative to replace other alternatives present today in the aviation industry, promoting greater efficiency in load transfer, lower cost, high corrosion resistance, lower crack propagation and greater integration of parts. Thus, this work aims to study aeronautical metal structural joints reinforced by bonded doublers, through the analysis by analytical, numerical and experimental models, with emphasis on stress analysis of adhesive. In addition, software was created with a friendly interface gathering the most important analytical models in the analysis of bonded doublers, and allowing within this software to make the comparison with numerical models. Due the lack of standard tests and its relatively new study, new proceedings were created. These techniques were developed by the use of digital image processing and strain gage. Several subcomponents were designed and tested to simulate the actual application of bonded doublers, through the development of an optimization process in order to reduce weight of the aircraft
Mestrado
Mecanica dos Sólidos e Projeto Mecanico
Mestre em Engenharia Mecânica
Moravec, Josef. "Osobní výtah pro obytné budovy." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2014. http://www.nusl.cz/ntk/nusl-231640.
Повний текст джерелаIto, Kelly Cristiane. "Estudo biomecânico de tração (ex-vivo) em osteotomia da tuberosidade tibial de cães estabilizada com placa fixa por \"garfo\" ou parafuso." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/10/10137/tde-22032013-130011/.
Повний текст джерелаTibial tuberosity advancement (TTA) is one of the techniques for treatment of cruciate ligament rupture in dogs developed by Montavon, Damur and Tepic (2002). The success of the technique in reducing or eliminating the forces of cranial tibial displacement in knees with ruptured cranial cruciate ligament as been documented in experimental and clinical studies. In the post-operative technique, implant failure is reported in 1-5% of hindlimbs operated. This number was attributed to technical error or the initial design of the implant that was considered insufficient. To compare the biomechanical strength between two different plates ATT and minimize the incidence of implant failures, biomechanical tests were performed on 10 pairs of hindlimbs cadaver dogs, the right hindlimb fixed plate and a fork in the left pelvic limbplate fixed by screws. As says were performed using a universal mechanical testing Kratos ® model 5002, equipped with a load cell of 3000N with a test speed of 20 mm / min. The strength parameter and graphs generated were recorded via analog acquisition system TRACOMP-W95 (TRCV61285). The mean load to failure was 128.70 kg/F (minimum 104.55 Kg and maximum 151.80 Kg/F) and 141.99 Kg/F (minimum 111.60 Kg/F and maximum 169.65 Kg/F) in the group using \"fork\" and screws respectively. The standard deviation of the groups \"fork\" and bolt was low, 12.99 and 17.21 respectively. Significant difference (p = 0.0309) between the means of the groups.
Arrais, Freire Reuber. "Use of fiberglass geogrids to the reinforcement of bituminous mixtures layers." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSET009.
Повний текст джерелаThis doctoral dissertation was developed at the Laboratory of Tribology and Dynamics of Systems (LTDS) at the Ecole Nationale des Travaux Publics de l’Etat (ENTPE), France. It was part of a partnership between the French companies Afitexinov and EIFFAGE Infrastructures. It also had the support of the Brazilian science without borders program from CNPq. The objective of this study is to contribute to the future development of new geosynthetics to the reinforcement of bituminous mixtures. As well as to provide useful information that could allow the proposition of new design method for reinforced pavement structures. To this end, five slab configuration was conceived, four bi-layered and one whole, containing the same type of bituminous mixture regardless of the configuration. From the bi-layered slabs, three were reinforced with the combination of two fiberglass geogrids (50 and 100kN/m maximum tensile strength) with two emulsions as tack coat (bitumen pure and modified by SBS). The last bi-layered slab was unreinforced, containing only emulsion bitumen pure on its interface. The first experimental campaign concerned the characterization of the behavior of cylindrical specimens reinforced by fiberglass geogrid at a small strain domain using cyclic tension-compression tests. A new interface analysis method was proposed for complex modulus tests of specimens reinforced by geogrid. From test results, the interface behavior obtained was linear viscoelastic (LVE) and it could be modelled by 2S2PD model. The second experimental campaign concerned characterization at monotonic axial tension loading. Three temperatures were combined with two strain rates of loading for the tension characterization. The results showed that the geogrid was not highly mobilized possibly due to a slippage in the interface. The third experimental campaign concerned fatigue characterization. Sinusoidal tension-compression tests at 10°C, 10Hz, and controlled strain at different amplitudes were carried out. The different configurations presented distinct susceptibility to strain amplitude variation of Wöhler curves. For the French design method for pavements, according to the parameter ε6 obtained in this work, the geogrid reinforcement effect was negligible. The fourth experimental campaign concerned the crack propagation resistance characterization. Four-point bending notched fracture (FPBNF) test was carried out using beams. 3D Digital Image Correlation device was used to calculate the strain field during the crack propagation as well as its tip. A force plateau, proportional to the geogrid maximum tensile strength, was observed in reinforced results related to the mobilization of the geogrid during the test
Thémines, Dominique. "Etude de la rupture et de l'endommagement thermique de refractaires siderurgiques." Caen, 1987. http://www.theses.fr/1987CAEN2044.
Повний текст джерелаHuin, Thibaut. "Experimental and numerical investigation of the mechanical behaviour of dissimilar arc and spot welds of advanced high strength steels." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI055/document.
Повний текст джерелаNowadays, ecological policy encourages carmakers to reduce the global vehicle weight. Fine steel sheets assemblies with different thickness optimizing each part of the assembly are used and steelmakers develop steels which are more and more resistant namely Advanced High Strength Steel (AHSS) with a good compromise between mechanical strength and ductility (stamping). During the mechanical tests of heterogeneous AHSS welding, unusual fracture modes are observed, in particular along the interface between the Heat Affected Zone (HAZ) and the Fusion Zone or molten zone (FZ). These fractures generally occur with lower strength than expected for these welding. The objectives of the study are to understand fracture mechanisms during mechanical testing and create a mechanical FE model is developed to be able to predict mechanical strength of the welded assemblies. Firstly, a study of heterogeneous welding constituted of two well-known steel grades of ArcelorMittal aims at understanding failure mechanism and parameters affecting the failure modes. Different configurations are studied with thickness. FE model is built with mechanical response identified of each zone (base materials, heat affected zones and fusion zone), using ArcelorMittal models and experimental data. Failure criteria based on ductile damage taking into account the influence of the triaxiality are used and some cohesive elements are used to simulate interfacial failure. Two configurations of mechanical testing in the case of Resistance Spot Welding (cross tension and tensile shear tests) are considered. Model predictions were very accurate with experimental failure modes and strengths. Then, this FE modelling method was successfully applied to a highly heterogeneous spot welding case including a new third generation low density AHSS concept with high aluminum and manganese content. Failure modes and strengths obtained were comparable. Moreover, FE modelling method was applied on more complex configurations, in particular on a triple thick spot welded assembly. The robustness of the model to predict partial failure modes and strengths of a triple thick spot weld has been demonstrated. In addition, FE modelling methodology was extended to another welding type: arc welding. In this case, two sheets are welded in ab overlap configuration with a filler wire. FE model allows predicting the failure zone and strength of welded assembly
Pascoal, Martim de Almeida Nóbrega Correia. "Leucocyte versus advanced-platelet rich fibrin membranes resistance to traction : a comparative study." Master's thesis, 2019. http://hdl.handle.net/10400.14/28469.
Повний текст джерелаPurpose: This study aimed at comparing the resistance traction between membranes produced with the protocol L-PRF (Leucocyte-Platelet Rich Fibrin) versus the protocol A-PRF (Advanced-Platelet Rich Fibrin). Materials and Methods: After blood collection of a healthy individual with no history of anticoagulant usage, we produced fibrin membranes according to the protocols L-PRF and A-PRF, previously described in the literature. Afterwards the membranes (13 for each condition) were submitted to a traction test, assessing the maximal traction and the average traction obtained for each membrane. The data was analyzed using unpaired t-test. Results: Regarding average traction, the A-PRF protocol obtained a value of 0.0288 N.mm-2 and L-PRF 0.0192 N.mm-2 (p<0.05 using unpaired t-test; n=13). For maximal traction A-PRF obtained 0.0752 N.mm-2 and L-PRF 0.0425 N.mm-2 (p<0.05 using unpaired t-test; n=13). Conclusion: With this study, we conclude that the A-PRF protocol generates membranes with higher maximal traction average traction scores, which indicates an increased resistance when two opposing forces are applied to it. This fact, associated with the optimization of the cellular and biological properties, make A-PRF a better protocol for the preparation of fibrin membranes.
Pedro, Mara Simões. "Platelet-rich fibrin membranes resistance to traction comparing A-PRF versus A-PRF+." Master's thesis, 2021. http://hdl.handle.net/10400.14/34572.
Повний текст джерелаPurpose: This study aimed to formulate a comparison of the mechanical properties of tensile strength and structural organization between membranes produced by A-PRF (Advanced Platelet-Rich Fibrin) and A-PRF+ (Advanced Platelet-Rich Fibrin+). Materials and Methods: Blood was collected from a healthy donor with no history of anticoagulant or immunosuppressant use, the membranes were prepared following the protocol indications defined in the literature for A-PRF and A-PRF+. From an N=16 for each protocol, 13 membranes of A-PRF and 12 of APRF+ were submitted to the traction test, evaluating maximum and average traction. Data was statistically analyzed using the unpaired t test. Membranes were then carefully observed in SEM (Scanning Electron Microscopy). Results: For maximum traction were obtained 0.0020 for A-PRF and 0.0022 for A-PRF+. Regarding the average traction, A-PRF scored 0.0012 while A-PRF+ obtained 0.0015 (p=0.01 unpaired t-test). Surface morphology observations with SEM, A-PRF+ showed to be the most porous platelet concentrate, with greatest fiber abundance and cell preservation. Conclusion: This study allowed to conclude that A-PRF+ protocol was able to produce membranes with higher maximum traction results than those found for A-PRF, indicating that the protocol with low centrifugation time, presented membranes with better viscoelastic strength when they are stretched by two opposed forces. To this phenomenon is added the architecture demonstrated in the A-PRF+ matrix and the optimized biological properties described in literature. A-PRF+, by the view of the developed findings in this work, a better option compared to A-PRF. Keywords: “Platelet-Rich Fibrin”, “Viscoelastic”, “Tensile Strength”, “Rupture”, “Porosity”, “Low-Speed Centrifugation Concept”.
CHENG-XIANG, ZHANG, and 張程翔. "Synergistic Improvements of Rolling Resistance and Wet Traction for Silica-Filled Rubber Nanocomposites." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/mqeh4s.
Повний текст джерела國立臺北科技大學
分子科學與工程系有機高分子碩士班
106
Nowadays, it is a mainstream to use silica nanoparticles as fillers for tire rubber materials. Compared to the traditional carbon black (CB) as filler for tire rubber, silica nanoparticles have better effect on the mechanical properties of tire rubber for wider range of applications. But silica nanoparticles can not be dispersed well in rubber because the compatibility between silica and rubber is not good enough. To overcome this problem, a silane coupling agent with more than one alkoxy group at its both ends has been used for the modification. In addition, the amount of silane coupling agent is also needed to be considered. In this study, a suitable amount of coupling agent was found, and then a series of hybrid compounds were prepared by adding a tackifier and using different mixing process methods. The reactivity of the silane coupling agent, dispersibility of the silica nanoparticles and dynamic properties of tire rubbers were studied by using various techniques of Pyrolysis-GCMS, SAXS, TEM, mixing sequence and DMA.
Robinson, Peter William Alexander. "Dynamics of open and closed belt conveyor systems incorporating multiple drives." Thesis, 2016. http://hdl.handle.net/1959.13/1312200.
Повний текст джерелаThe incorporation of conveyor systems throughout industry has seen an increase in demand for systems that exceed the specification of conventional conveyors. This coupled with the demand to convey bulk materials over larger distances, at higher speeds and efficiencies, requires the development of a versatile design approach. This thesis explores the design aspects associated with modern pouch conveying systems, and how they vary, and can be adapted from theories used with conventional troughed conveyors. In particular, the indentation rolling resistance (IRR) is explored in detail, as this can account for up to 60% of the drag forces of a system. This is the drag force that arises due to an asymmetric pressure distribution as the idler roll shell indents the bottom cover of the belt. The potential idler roll arrangements for a generic pouch conveying system are analysed, and compared with experimental values. In addition to this, the drive traction attainable from suitable drive stations is analysed. Troughed conveyors typically wrap the conveyor belt around a large drive pulley, generating large amounts of traction. Given the layout of pouch conveying systems, a different approach is required, at multiple locations. As such, pouch conveyors are typically driven through simply supported drive stations, with small areas of contact with the belt. The useable traction from these point contact drives is considered. These theories are then united and applied to a dynamic package capable of handling multiple conveyor designs. This package utilises Finite Element Modelling (FEM) to model the viscoelastic nature of the system, based on the distributed drag forces, and inputs of the conveyor. Lastly, to qualify this theory, experimental analysis is conducted on an on-site installation, and compared with the theoretical results.
Tong, Kuo-Feng. "Simultaneous Plant/Controller Optimization of Traction Control for Electric Vehicle." Thesis, 2007. http://hdl.handle.net/10012/3194.
Повний текст джерелаБулаєнко, Руслан Олексійович, Вікторія Олегівна Булаєнко, Ruslan Bulaіenko та Viktoriia Bulaіenko. "Обґрунтування параметрів робочих органів картоплезбирального комбайна КПБ-1". Master's thesis, 2021. http://elartu.tntu.edu.ua/handle/lib/36795.
Повний текст джерелаThe purpose of the qualification work is to study the interaction with the soil of the excavating working bodies of the potato harvester with the justification of their main parameters. The master's qualification work the constructive parameters of digging working bodies of the potato combine harvester are substantiated; technological parameters of the potato combine harvester (productivity, traction resistance and power consumption) are substantiated; the energy means for aggregation of the combine are selected; strength calculations were performed. CAD-models of digging working bodies of potato combine harvester and discrete-element model of soil environment are developed. According to the results of simulation modeling of the interaction of the digging working bodies of the potato harvester with the soil, a number of interaction parameters were obtained (effort, stress, oscillation frequency, power). The issues of labor protection when working with potato combines harvester and safety in emergencies are considered.