Exploració per tema "Plasticitat"
Ara es mostren els items 21-40 de 552
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A contact problem aplication for the local behaviour of soil pile interaction
(CIMNE, 2017)
Text en actes de congrés
Accés obertIn geotechnical engineering, the main parameter for the performance of structures such as reinforced walls or deep foundations is often the shaft bearing capacity. In numerical analysis, important advancements have been ... -
A continuum model accounting for the effect of the initial and evolving microstructure on the evolution of dynamic recrystallization
(CIMNE, 2017)
Text en actes de congrés
Accés obertLaser assisted forming is a process which is increasingly being adopted by the industry. Application of heat by a laser to austenitic stainless steel (ASS) sheet provides local control over formability and strength of the ... -
A critical discussion on the usefulness and reliability of mathematical modeling for service life design of infrastructure
(CIMNE, 2013)
Text en actes de congrés
Accés obertIn view of the increasing age of existing structures asset managers are becoming more and more interested to have a clearer picture on the actual condition of the complete stock of existing infrastructure as to anticipate ... -
A deterministic filter for estimation of parameters describing inelastic heterogeneous media
(CIMNE, 2011)
Text en actes de congrés
Accés obertWe present a new, fully deterministic method to compute the updates for parameter estimates of quasi-static plasticity with combined kinematic and isotropic hardening from noisy measurements. The materials describing the ... -
A dual mortar-based contact formulation applied to finite plastic strains – Complas XI
(CIMNE, 2011)
Text en actes de congrés
Accés obertSignificant progress has been made on computational contact mechanics over the past decade. Many of the drawbacks that were inherent to the standard node-tosegment element strategy, such as locking/over-constraint and ... -
A dynamic recrystallization simulation based on phase-field and dislocation-crystal plasticity models
(CIMNE, 2011)
Text en actes de congrés
Accés obertIn this paper, so as to reproduce the dynamic recrystallization, the dislocationcrystal plasticity model devotes to a deformation analysis and multi-phase-field one to nucleus growth calculation. First, we place a few ... -
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 finite strain thermo-mechanically coupled material model for semi-crystalline polymers
(CIMNE, 2019)
Text en actes de congrés
Accés obertIn this work, a thermo-mechanically coupled constitutive model for semicrystalline polymers is derived in a thermodynamically consistent manner. In general, the macroscopic material behaviour of this class of materials is ... -
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 ...