Exploració per tema "Plasticity"
Ara es mostren els items 1-20 de 428
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2D adaptive FEM simulation of failures in high-speed impacts
(CIMNE, 2011)
Text en actes de congrés
Accés obertThe simulation of high-speed impacts needs the use of advanced constitutive equations required for the accurate prediction of the different thermomechanical fields and their mutual interactions (temperature, large strains, ... -
3D analysis of H-M coupled problem with zero-thickness interface elements applied to geomechanics
(CIMNE, 2015)
Comunicació de congrés
Accés obertIn spite of the significant developments seen in recent years,numerical modelin of Hydraulic Fracturing still poses major challenges due to the strong coupling between fluid flow and crack development,which is itself a ... -
3D discrete element modeling of concrete: study of the rolling resistance effects on the macroscopic constitutive behavior
(CIMNE, 2013)
Text en actes de congrés
Accés obertThe Discrete Element Method (DEM) is appropriate for modeling granular materials [14] but also cohesive materials as concrete when submitted to a severe loading such an impact leading to fractures or fragmentation in the ... -
3D modeling of damage growth and ductile crack propagation using adaptive fem technique
(CIMNE, 2011)
Text en actes de congrés
Accés obertIn this paper, the continuum damage mechanics model originally proposed by Lemaitre [1] is presented through an adaptive finite element method for three-dimensional ductile materials. The macro-crack initiation–propagation ... -
3D modelling of geomaterials accounting for an unconventional plasticity approach
(CIMNE, 2011)
Text en actes de congrés
Accés obertThe coupled hydro-mechanical state in geomaterials undergoing plasticity phenomena is here evaluated by means of the subloading surface model . The most important feature of this theory is the abolition of the distinction ... -
3D modelling of the elasto-plastic behaviour of adhesively bonded joints suited for a wide range of tensile-shear loads
(CIMNE, 2011)
Text en actes de congrés
Accés obertAirframe developments use composite components extensively; bonding, as a rivetless assembly solution, is thus gaining in importance, leading to the need for accurate characterization of adhesive behaviour and the development ... -
3d numerical model of a confined fracture tests in concrete
(CIMNE, 2013)
Text en actes de congrés
Accés obertThe paper deals with the numerical simulation of a confined fracture test in concrete. The test is part of the experimental work carried out at ETSECCPB-UPC in order to elucidate the existence of a second mode of fracture ... -
3D-Mesomechanical analysis of cracking and spalling of concrete subject to high temperatures
(CIMNE, 2013)
Text en actes de congrés
Accés obertIn this paper, an existing meso-structural model for concrete which had been applied to the study of the mechanical effects of high temperatures in 2D, is extended to 3D, and to more complex coupled thermo-mechanical ... -
A benchmark study on identification of inelastic parameters based on deep drawing processes using pso – nelder mead hybrid approach
(CIMNE, 2013)
Text en actes de congrés
Accés obertOptimization techniques have been increasingly used to identification of inelastic material parameters owing to their generality. Development of robust techniques to solving this class of inverse problems has been a challenge ... -
A bodner-partom visco-plastic dynamic sphere benchmark problem
(CIMNE, 2013)
Text en actes de congrés
Accés obertDeveloping benchmark analytic solutions for problems in solid and fluid mechanics is very important for the purpose of testing and verifying computational physics codes. Our primary objective in this research is to obtain ... -
A combined finite-discrete element model for reinforced concrete under seismic load
(CIMNE, 2011)
Text en actes de congrés
Accés obertIn this work a numerical model for analysis of reinforced concrete structures under seismic load is presented. The model uses the combined finite-discrete element method; thus taking into account the discontinuous nature ... -
A comparative study of failure criteria in sheet metal forming analysis
(CIMNE, 2011)
Text en actes de congrés
Accés obertDevelopment of predictive capabilities of forming failure can help not only to reduce the experimental effort of formability characterization but also to accelerate the development of new or improved sheet metal alloys. ... -
A comparison between the total lagrangian scheme (TLS) and the predominat twin reorientation (PTR) methods to analyze the twinning deformations in a rate dependent crystal plasticity model
(CIMNE, 2011)
Text en actes de congrés
Accés obertMaterials with Hexagonal-Closed Pack (HCP) crystal structures, as for example the magnesium and titanium alloys, have a small number of active slip systems at room temperature. This fact makes twinning as a predominant ... -
A computational procedure for the cyclic steady state elastoplastic analysis of structures - COMPLAS XI
(CIMNE, 2011)
Text en actes de congrés
Accés obertA new computational procedure for the steady state elastoplastic analysis of structures under cyclic loading is presented. The procedure is based on the decomposition of the unknown steady state residual stress distribution ... -
A computational study on the overload characteristic curves of projectile penetrating metal object
(CIMNE, 2011)
Text en actes de congrés
Accés obertThe paper, based on ANSYS/LS-DYNA software, made a computational study on the overload characteristic curves of projectile penetrating metal objects. Adopting Lagrange method, Lagrangian-Eulerian coupling algorithm and SPH ... -
A constitutive model for soft clayey rocks that includes weathering effects
(Institution of Civil Engineers (http://www.ice.org.uk/), 2007)
Article
Accés obertMicrostructural and mineralogical observations of claystones reveal the presence of clay aggregates bonded by a skeleton of inert minerals such as calcium carbonate. The behaviour of these natural materials evolves from ... -
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 ...