Exploració per tema "Plasticitat"
Ara es mostren els items 1-20 de 552
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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 finite element simulations of reinforced concrete elements exposed to fire
(CIMNE, 2017)
Text en actes de congrés
Accés obertFire could dramatically reduce strength of reinforced concrete elements and it is considered one of the major threats for the structural safety of buildings: structural members may even collapse due to intensity and duration ... -
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 modeling of the vane test on a power-law cement paste by means of the proper generalized decomposition
(CIMNE, 2017)
Text en actes de congrés
Accés obertThe effective modeling of the flow of fresh concrete materials in settings such as that of the vane test is a challenging process that is the object of ongoing research. Previous works modeled concrete and cement pastes as ... -
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 ... -
3D-Mesomechanical analysis of external sulfate attack in concrete
(CIMNE, 2017)
Text en actes de congrés
Accés obertThe present study focuses on degradation of concrete by external sulfate attack. The numerical model developed by the MECMAT/UPC group, incorporates coupled C-M analysis using a meso-mechanical approach with discrete ... -
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 comparison of two frameworks for kinematic hardening in hyperelasto-plasticity
(CIMNE, 2017)
Text en actes de congrés
Accés obertIn this work we compare two frameworks for thermodynamically consistent hyperelasto-plasticity with kinematic hardening. The first was formulated by Dettmer and Reese (2004), inspired by Lion (2000), and has been used to ... -
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 ...