Exploració per tema "Plasticity"
Ara es mostren els items 21-40 de 428
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A finite element method for thermo-mechanical coupling analysis of shape memory alloys
(CIMNE, 2013)
Text en actes de congrés
Accés obertDue to strong thermo-mechanical coupling in shape memory alloys (SMAs), heat generation/absorption during forward/reverse phase transformation can cause temperature variations in the material; influencing its mechanical ... -
A finite element strategy coupling a gradient-enhanced damage model and cohesive cracks for quasi-brittle materials
(CIMNE, 2013)
Text en actes de congrés
Accés obertA new combined strategy to describe failure of quasi-brittle materials is presented thus allowing the complete description of the process, from initiation of damage to crack propagation. For the early stages of the process, ... -
A general framework for softening regularisation based on gradient elasticity
(2011-05-01)
Article
Accés obertA general non-local approach to regularise strain-softening continua is presented. The key idea is to introduce the gradient-type enrichment at the level of displacements (rather than some internal variable), so the model ... -
A generalized finite element method for modeling arbitrary interfaces in large deformation problems
(CIMNE, 2011)
Text en actes de congrés
Accés obertIn this paper, a generalized–FEM technique is presented in modeling of arbitrary interfaces in large deformations. The method is used to model the internal interfaces and arbitrary geometries using a uniform non-conformal ... -
A link between the phenomenological and physical modelling of transformation-induced plasticity
(CIMNE, 2013)
Text en actes de congrés
Accés obertIn high temperature shape memory alloys, the inelastic deformation mechanism is a combination of the transformation strain, viscoplastic strain in austenitic and martensitic phases, and transformation-induced plasticity. ... -
A mechanical behavior law for the numerical simulation of the mushy zone in welding
(CIMNE, 2013)
Text en actes de congrés
Accés obertThe aim of this work is to propose a mechanical behavior law dedicated to the mushy zone located between the solid phase and the weld pool in welding. The objective is to take into account of the influence of the mushy ... -
A mesoscale finite element simulation of intermittent plastic flow of micropillar compression under hybrid loading mode
(CIMNE, 2013)
Text en actes de congrés
Accés obertThe plastic deformation of the micropillar proceeds as a series of strain bursts, showing an intermittent plastic flow. In this work, we present a stochastic finite element method in crystal plasticity to describe the ... -
A method for post-processing of finite element analyses to assess critical macroscopic voids
(CIMNE, 2013)
Text en actes de congrés
Accés obertA method for post-processing of finite element analyses to assess critical macroscopic voids is presented. One single, global analysis of the structure or component is carried out and then post-processed. By using a template ... -
A Method for suppresion of defects in zigzag bending of sheet metal
(CIMNE, 2015)
Text en actes de congrés
Accés obertThis study presents methods for suppression of defects observed in zigzag bending of sheet-metal or plate. This type of bending is widely used in industry for manufacturing structural parts in automobiles. Although it is ... -
A method of two-scale chemo-thermal-mechanical coupling for concrete
(CIMNE, 2011)
Text en actes de congrés
Accés obertThe Alkali Silica Reaction(ASR) is one of the most important reasons to cause damage in cementitious constructions, which can be attributed to the expansion of hydrophilic gel produced in the reaction. In this contribution, ... -
A micromechanical constitutive model for ductile fracture: numerical treatment and calibration strategy
(CIMNE, 2011)
Text en actes de congrés
Accés obertThis contribution describes the numerical treatment and calibration strategy for a new micromechanical damage model, which employs two internal damage variables. The new micromechanical model is based on Gurson's theory ... -
A micromorphic continuum formulation for finite strain inelasticity
(CIMNE, 2011)
Text en actes de congrés
Accés obertThis work proposes a generalized theory of deformation which can capture scale effects also in a homogenously deforming body. Scale effects are relevant for small structures but also when it comes to high strain concentrations ... -
A microstructural approach to modelling inelastic effects in fibred biological tissues
(CIMNE, 2011)
Text en actes de congrés
Accés obertEnormous progress has been made during recent years in the phenomenological modelling of soft tissue. In general, three important softening phenomena associated with biological tissues may be distinguished. First, there ... -
A mixed algorithm for incremental elastoplastic analysis
(CIMNE, 2011)
Text en actes de congrés
Accés obertA new method for the incremental analysis of elastoplastic associated materials is presented. The method fully retains all the equations and variables of the problems at the same level and uses a sequential quadratic ... -
A multi-phase-field simulation of carbon steel under actual conditions of a hot rolling process
(CIMNE, 2015)
Comunicació de congrés
Accés obert -
A new 3D-beam finite element including non-uniform torsion with the secondary torsion moment deformation effect
(CIMNE, 2013)
Text en actes de congrés
Accés obertIn this paper, a new 3D Timoshenko linear-elastic beam finite element including warping torsion will be presented which is suitable for analysis of spatial structures consisting of constant open and hollow structural section ... -
A new crystal plasticity constitutive equation based on crystallographic misorientation theory
(CIMNE, 2011)
Text en actes de congrés
Accés obertSince plastic deformation of polycrystal sheet metal is greatly affected by its initial and plastic deformed textures, multi-scale finite element (FE) analysis based on homogenization with considering micro-polycrystal ... -
A new formulation to assess the seismic demand of masonry structures by means of input energy
(CIMNE, 2011)
Text en actes de congrés
Accés obertThe main objective of this paper is to evaluate the elastic input energy of unreinforced masonry structures by means of the input energy spectrum. The energy is a novel approach which allows evaluating in a global and ... -
A numerical method for calculating the strain rate intensity factor
(CIMNE, 2015)
Comunicació de congrés
Accés obertThe strain rate intensity factor is the coefficient of the leading singular term in a series expansion of the equivalent strain rate in the vicinity of maximum friction surfaces. In the case of rigid perfectly plastic ... -
A numerical model of the structural behavior of buckling-restrained braces
(2012-08)
Article
Accés obertThis work presents a numerical model of the cyclic structural behavior of dissipative buckling-restrained braces, commonly used as an alternative to classical concentric braces for seismic protection of building frames and ...