نتایج جستجو برای: viscoplastic model
تعداد نتایج: 2104996 فیلتر نتایج به سال:
We present an estimate approach to compute the viscoplastic behavior of a polymeric composite under different thermomechanical approaches. This investagation incorporates computational neural network as the tool for determining the creep behaviour of the composite. We propose a new second-order learning algorithm for training the multilayer networks. Training in the neural network is generally ...
The study and development of recycling techniques for pavements is an increasing activity in engineering nowadays. This research line demands a more realistic characterization of the material properties with the aim of simulate the asphalt mixture’s response placed into a multilayered system over granular bases, under dynamic loads, considering also temperature variation or strenght reduction f...
We study the existence theory to quasistatic initial-boundary value problems with internal variables, which model the viscoelastic or viscoplastic behavior of solids at small strain. In these problems a system of linear partial differential equations coupled with a nonlinear system of differential equations or differential inclusions must be solved. The solution theory is based on monotonicity ...
An unified viscoplastic model with internal kinematic variables is used to improve the description of the uniaxial and proportional loadings performed in the pseudoelastic range of shape memory alloys. There is a good agreement between experimental data and simulations. Moreover, this constitutive set of equations is efficient for the description of internal loops and the isothermal cyclic load...
Influence of inertial and thermal effects on the dynamic growth of voids in porous ductile materials
The influence of inertial, thermal and rate sensitive effects on the void growth at high strain rate in a thermal viscoplastic solid is investigated by means of a theoretical model presented in the present paper. Numerical analysis of the model suggests that inertial, thermal and rate sensitive effects are three major factors which greatly influence the behavior of void growth in the high strai...
Abstract In this study, we consider the nonlinear viscoelastic–viscoplastic behavior of adhesive films in scarf joints. We develop a three-dimensional model, which combines viscoelastic model with viscoplastic using von Mises yield criterion and kinematic hardening. implement an iterative scheme for solution numerical algorithm stress correction combined into finite element analysis. The compon...
Abstract This study aims to describe a toughened adhesive’s ratcheting–recovery behavior under reversed cyclic load using viscoelastic–viscoplastic model. As most adhesives are based on synthetic polymers, their tensile and compression response can be different. A series of load–Sunload tests were conducted bulk bonded joints involving tension/compression–shear loads characterize the initial yi...
An elasto-viscoplastic constitutive model was previously developed and successfully used to describe the anisotropic time-dependent response of short fiber reinforced thermoplastics. It is demonstrated that when it applied systems with a higher level anisotropy, apparent anisotropy rate-dependent yield stress deviates from Hill parameters are define it. This becomes more if increased. The origi...
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