Elastoplastic Model
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. Austenitic Grain Size Prediction in Hot Forging of a 20MnCr5 Steel by Numerical Simulation Using the JMAK Model for Industrial Applications
Yield strength and toughness in steels are directly associated with hot forging processes, especially by controlling austenitic grain size and cooling conditions. The phenomenological JMAK model in macroscale has been applied in different material classes to predict grain size after hot forming. However, on an industrial application, there is still a lack of
Mat. Res.. Publicado em: 05/12/2019
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2. Multi-scale representation of plastic deformation in fiber-reinforced materials: application to reinforced concrete
Abstract Here we present a multi-scale model to carry out the computation of brittle composite materials reinforced with fibers, and we show its application to standard reinforced concrete. The computation is carried out within an operator-split framework on the macro-scale, which allows for different failure mechanisms to develop in separate phases, as both
Lat. Am. j. solids struct.. Publicado em: 12/08/2019
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3. Study on elastoplastic coupling mechanics model of the milled mixture of sugar cane
Abstract At present, the phenomenon of elastoplastic coupling isn’t considered in establishing the mechanics model of the milled mixture of sugar cane. In order to describe elastoplastic coupling and yield characteristics, based on uniaxial confined compression tests and direct shear tests, the evolution of the elastic parameters of the solid fiber with v
Food Sci. Technol. Publicado em: 11/04/2019
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4. DYNAMIC OF PRESSURE-DEFORMATION CURVE IN UNIAXIAL COMPRESSION TEST IN DIFFERENT LOAD TIMES
ABSTRACT: The loading application time by machinery tires and agricultural tires is one of the factors of soil compaction. We evaluated the effect of loading reduction time in uniaxial compression test, in laboratory, in some physical and mechanical parameters, approaching the loading field condition time by machinery with laboratory tests. Soil samples of t
Eng. Agríc.. Publicado em: 2017-09
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5. Elastoplastic Stability and Failure Analysis of FGM Plate with Temperature Dependent Material Properties under Thermomechanical Loading
Abstract The present paper explores the stability and failure response of elastoplastic Ni/Al2O3 functionally graded plate under thermomechanical load using non-linear finite element formulation based on first-order shear deformation theory and von-Karman’s nonlinear kinematics. The temperature dependent thermoelastic material properties of FGM plate are v
Lat. Am. j. solids struct.. Publicado em: 2017-08
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6. Numerical Analysis of an Intercity Bus Structure: A Simple Unifilar Model Proposal to Assess Frontal and Semifrontal Crash Scenarios
Abstract To improve the safety of the intercity bus structure against impact scenarios and to reduce the injuries and death in traffic accidents it is crucial in a country with continental dimensions like Brazil, where the road transport matrix is fundamental in the traffic of people and goods. In this context in the present article, a numerical model of an
Lat. Am. j. solids struct.. Publicado em: 2016-09
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7. Failure behavior modeling of slender reinforced concrete columns subjected to eccentric load
AbstractThis work presents a numerical model to simulate the failure behavior of slender reinforced concrete columns subjected to eccentric compression loads. Due to the significant influence of the lateral displacements on the loading state provided by an eccentric load, geometric nonlinearity is considered. The responses of the concrete in tension and comp
Lat. Am. j. solids struct.. Publicado em: 2015-03
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8. Physical and geometrical non-linear analysis of plane frames considering elastoplastic semi-rigid connections by the positional FEM
This study presents an alternative Finite Element formulation based on positions to model plane frames considering geometrical non-linear and elastoplastic behavior for members and semi-rigid connections. The formulation includes shear effects and allows the consideration of important mechanical behavior of structures in design decisions and verifications. T
Lat. Am. j. solids struct.. Publicado em: 2014-12
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9. Simple extension of Lemaitre's elastoplastic damage model to account for hydrolytic degradation
Being motivated by the technological applications of bioabsorbable polymeric materials in the fields of biomechanics and medicine, this paper presents a simple but efficient extension of Lemaitre's elastoplastic damage model by incorporating a chemical-based (hydrolysis) degradation term. The aim is to allow the simulation of devices subjected to both mechan
Lat. Am. j. solids struct.. Publicado em: 2014-10
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10. Análise por elementos finitos de maciços escavados por túneis. / Finite element analysis of tunnel excavation.
O presente trabalho de pesquisa aborda a aplicação de análise por elementos finitos a maciços escavados por túneis, revisando relevantes estudos sobre análise numérica deste tipo de obra e realizando modelagem numérica própria, bi e tridimensional, voltada ao caso do Túnel Paraíso do Metrô de São Paulo (obra com dados de instrumentação e de en
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/07/2011
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11. Um modelo elasto-plástico para a análise da aderência em peças de concreto armado / An elasto-plastic model for analysis of bond in reinforced concrete
The bond mechanism between deformed bars and concrete is a complex phenomenon, influenced by many parameters. Many models have been developed over the years regarding this subject, but only a few have satisfactorily reproduced the physical phenomenon. In this work, to simulate the bond behavior, we propose a two-dimensional interface model where both concret
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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12. Colapsibilidade com sucção controlada de um solo coluvionar e laterítico de Campinas/SP / Collapsibility with controlled suction of a colluvial and lateritic soil from Campinas/SP
This study aims at investigating the collapsibility of coluvionar and lateritic soil by oedometer tests with controlled suction, performed in the laboratory, and by the interpretation of the soilimpregnated thin plates before and after the tests, so as to take into account the differences between natural and "after collapse" structures. The undisturbed soil
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 24/05/2010