Exploració per tema "Plasticitat"
Ara es mostren els items 41-60 de 552
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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 creep model directly using tabulated test data and implemented in ansys
(CIMNE, 2017)
Text en actes de congrés
Accés obertNowadays plastics are increasingly used in highly stressed structures in all kinds of constructions. The time dependency, the so-called viscosity, is a crucial part of the material behavior of plastics. A typical form of ... -
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 new interpretation of the global tracking algorithm in the context of the strong discontinuity approach
(CIMNE, 2017)
Text en actes de congrés
Accés obertThe numerical simulation of two-dimensional fracture processes of quasi-brittle materials by means of the Embedded Finite Element Method is dealt with. The attention is paid to the coupling with the global crack-tracking ... -
A note on modeling some classes of nonlinear systems from data
(CIMNE, 2019)
Text en actes de congrés
Accés obertWe study the modeling of bilinear and quadratic systems from measured data. The measurements are given by samples of higher order frequency response functions. These values can be identified from the corresponding Volterra ... -
A novel indicator for kinematic hardening effect quantification in deep drawing simulation
(CIMNE, 2019)
Text en actes de congrés
Accés obertDeep drawing simulation techniques reduce tool design costs and improve tool performance and reliability. In terms of strain hardening, mixed models capturing the kinematic effect are sometimes more accurate than isotropic ... -
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 porous media approach for foot biomechanics
(CIMNE, 2013)
Text en actes de congrés
Accés obertRecently a new computational model, based on the thermodynamically constrained averaging theory (TCAT), has been proposed to predict tumor initiation and proliferation [1, 2]. A similar mathematical approach is being ... -
A quasi-static nonlinear analysis for assessing the fire resistance of 3d frames exploiting time-dependent yield surface
(CIMNE, 2019)
Text en actes de congrés
Accés obertIn this work an automatic procedure for evaluating the axial force-biaxial bending yield surface of reinforced concrete sections in fire is proposed. It provides an accurate time-dependent expression of the yield condition ... -
A recursive calculation of the consistent tangent operator in elasto-plasticity
(CIMNE, 2015)
Comunicació de congrés
Accés obertThe paper presents a derivation of the consistent tangent operator (CTO) for the class of iterative constitutive integration algorithms. The derivation is based on a variational analysis of algorithmic equations with respect ... -
A robust and efficient 3D constitutive law to describe the response of quasi-brittle materials subjected to reverse cyclic loading: formulation, identification and application to a RC shear wall
(CIMNE, 2015)
Comunicació de congrés
Accés obertIn this paper, a new constitutive law aiming at describing the quasi-brittle behavior when subjected to cyclic loading is presented.The proposed model is formulated with in the frame work of isotròpic contínuum damage ... -
A stochastic framework for multiscale strength prediction using adaptive discontinuity layout optimisation (ADLO)
(CIMNE, 2013)
Text en actes de congrés
Accés obertThe prediction of strength properties of matrix-inclusion materials, which in general are random in nature due to their spatial distribution and variation of pores, particles, and matrix-inclusion interfaces, plays an ... -
A structured constitutive model for simulating the behaviour of an overconsolidated bonded clay
(CIMNE, 2011)
Text en actes de congrés
Accés obertThe paper presents some improvements in the formulation of a kinematic hardening constitutive soil model incorporating structure initially proposed for soft clays. For the modelling of overconsolidated bonded clay the ... -
A theoritical approach to the study of compaction bands in porous rocks
(CIMNE, 2011)
Text en actes de congrés
Accés obertThe formation and propagation of compaction bands in high porosity sandstones is theoretically investigated in this paper using a new constitutive model based on the recently developed continuum breakage mechanics theory ... -
A thermodynamically consistent cohesive damage model for the simulation of mixed-mode delamination
(CIMNE, 2017)
Text en actes de congrés
Accés obertThis work is devoted to the formulation of a new cohesive model for mixed-mode delamination. The model is based on a thermodynamically consistent isotropic damage formulation, with consideration of an internal ... -
A thermoviscoplastic model with damage for simultaneous hot/cold forging analysis
(CIMNE, 2013)
Text en actes de congrés
Accés obertA constitutive model is presented for simultaneous hot/cold forming processes of steels. The phenomenological material theory is based on an enhanced rheological model and accounts temperature dependently for nonlinear ... -
A two-scale constitutive parameters identification procedure for elasto-plastic fracture
(CIMNE, 2015)
Comunicació de congrés
Accés obertConstitutive parameters identification for elasto-plastic fracture is a complex problem due to the interplay between two forms of material nonlinearity, viz. plasticity and cohesive fracture. In the present study we examine ...