Large Strain
Mostrando 13-24 de 2442 artigos, teses e dissertações.
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13. An efficient general curvilinear coordinates finite element method for the linear dynamic study of thickness-independent shells
Abstract yyTo date, a large number of finite element methods have been developed to study the dynamics of shell structures. Most of them are generally based on the degenerated solid approach and other less in shell theories, but introducing, in this last case, some assumptions to analyze this problem: some of them refer to shallow shells (slightly curved she
Lat. Am. j. solids struct.. Publicado em: 27/06/2019
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14. Tri-modal Microstructure in Different Loading Zones Under TA15 Ti-alloy Isothermal Local Conventional Forging and Given Subsequent Heat Treatment
For TA15 Ti-alloy large-scale component, isothermal local conventional forging (ILCF) combined with subsequent heat treatment provides a feasible approach to obtain a tri-modal microstructure with attractive comprehensive performance. However the tri-modal microstructure characteristics and evolution laws in the first and second loading zones are lack of und
Mat. Res.. Publicado em: 10/06/2019
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15. Análisis de los elementos principales en el diseño de placas de bloqueo en una fractura de 2-partes del cuello quirúrgico del húmero utilizando MEF y análisis estadístico
ABSTRACT A large number of proximal humerus fractures are being treated with osteosynthesis. However, loss of reduction remains a serious problem and it can cause screw cutout at the humeral joint and reoperation. According to the interfragmentary strain theory, one should be aware of the balance between a flexible fixation, which stimulates callus formation
Matéria (Rio J.). Publicado em: 06/12/2018
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16. Numerical and experimental investigation of forming limit diagrams of 6063 aluminum alloy sheets using Ayada ductile fracture criterion and the second derivative of large strain criterion at increased temperatures
Abstract The present study investigated the forming limit diagrams (FLDs) of aluminum alloy 6063 sheets using numerical and experimental methods at increased temperatures. In the numerical section, for the first time, the Ayada ductile fracture criterion and the second derivative of the large strain criterion were used. ABAQUS finite element (FE) analysis so
Lat. Am. j. solids struct.. Publicado em: 17/09/2018
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17. The Effectiveness of Back Pressure in Superplastic Blow Forming of Aluminum Alloy AA 5083 Performed at Very Favorable Conditions for Cavitation Growth
Many components for aerospace and automotive industries are currently manufactured using superplastic forming, being the fine-grained aluminum alloy AA5083 widely used for this proposes. However, the development of cavitation voids is inherent in this process and reduces the ductility of the alloy. Back pressure can be used to diminish the growth of cavitati
Mat. Res.. Publicado em: 26/07/2018
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18. An axisymmetric nodal averaged finite element
Abstract A nodal averaging technique which was earlier used for plane strain and three-dimensional problems is extended to include the axisymmetric one. Based on the virtual work principle, an expression for nodal force is found. In turn, a nodal force variation yields a stiffness matrix that proves to be non-symmetrical. But, cumbersome non-symmetrical ter
Lat. Am. j. solids struct.. Publicado em: 26/04/2018
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19. Monitoring structures with optical fibers: infiltration detection
ABSTRACT The use of sensors and optical fibers for monitoring structures is continuously growing. Strains, displacements, accelerations, temperatures are just a few of the monitoring possibilities. In the case of dam structures, concrete face rockfill dams constitute a type of structures where the monitoring of water infiltrations is of particular interest.
An. Acad. Bras. Ciênc.. Publicado em: 2018-04
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20. Mangrove endophyte promotes reforestation tree (Acacia polyphylla) growth
ABSTRACT Mangroves are ecosystems located in the transition zone between land and sea that serve as a potential source of biotechnological resources. Brazil's extensive coast contains one of the largest mangrove forests in the world (encompassing an area of 25,000 km2 along all the coast). Endophytic bacteria were isolated from the following three plant spec
Braz. J. Microbiol.. Publicado em: 2018-03
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21. Desarrollo del cultivo de Agaricus bisporus en Brasil: suplementación del compost y utilización de híbridos
ABSTRACT The use of hybrids strains of known origin in mushroom cultivation is not very common in Brazil. Likewise, the practice of supplementation of compost is not applied. Supplementation of compost in mushroom cultivation consists in the addition at the end of Phase II composting process. The aim of the research is the evaluation of two doses of a commer
Rev. Ciênc. Agron.. Publicado em: 2018-03
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22. Recovery Mechanisms in a Compressed Ni-Ti Superelastic Alloy
The present work studied the influence of annealing on a Ni-Ti alloy submitted to uniaxial compression. The stress-strain curve under compression showed the absence of the Stress-Induced-Martensite (SIM) plateau and 42% of remaining austenitic phase (B2). identified by the Electron Backscattered Diffraction (EBSD) technique on a Scanning Electronic Microscop
Mat. Res.. Publicado em: 19/10/2017
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23. Determination of Forming Limit Diagrams Based on Ductile Damage Models and Necking Criteria
Abstract In this paper, forming limit diagrams (FLDs) for an aluminum alloy are predicted through numerical simulations using various localized necking criteria. A comparative study is conducted for the FLDs determined by using the Lemaitre damage approach and those obtained with the modified Gurson-Tvergaard-Needleman (GTN) damage model. To this end, both d
Lat. Am. j. solids struct.. Publicado em: 2017-10
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24. OUTDOOR CULTIVATION OF Scenedesmus obliquus BR003 IN STIRRED TANKS BY AIRLIFT
ABSTRACT: The use of microalgae as a source of raw material for biofuel production has been highly targeted. Compared to other biological options for the capture and use of CO2, microalgae crops have the following advantages: high productivity, lack of competition with feed and food-based products, use of unproductive and non-arable land, and allowance of th
Eng. Agríc.. Publicado em: 2017-09