NURBS plasticity: Yield surface representation and implicit stress integration for isotropic inelasticity
نویسندگان
چکیده
منابع مشابه
Implementing the New First and Second Differentiation of a General Yield Surface in Explicit and Implicit Rate-Independent Plasticity
In the current research with novel first and second differentiations of a yield function, Euler forward along with Euler backward with its consistent elastic-plastic modulus are newly implemented in finite element program in rate-independent plasticity. An elastic-plastic internally pressurized thick walled cylinder is analyzed with four famous criteria including both pressure dependent and ind...
متن کاملImplicit numerical integration of a three-invariant, isotropic/kinematic hardening cap plasticity model for geomaterials
The mechanical constitutive behavior of geomaterials is quite complex, involving pressure-sensitive yielding, differences in strength in triaxial extension vs. compression, the Bauschinger effect, dependence on porosity, and other factors. Capturing these behaviors necessitates the use of fairly complicated and expensive non-linear material models. For elastically isotropic materials, such mode...
متن کاملComparison of two integration schemes for a micropolar plasticity model
Micropolar plasticity provides the capability to carry out post-failure simulations of geo-structures due to microstructural considerations and embedded length scale in its formulation. An essential part of the numerical implementation of a micropolar plasticity model is the integration of the rate constitutive equations. Efficiency and robustness of the implementation hinge on the type of int...
متن کاملAn Adaptive Integration Scheme in Computational Inelasticity
In this paper, an adaptive approach based on a time discontinuous Galerkin method (dG) is proposed. For large time steps and in a linear non-autonomous case, it reduces to the asymptotically second-order accurate Lobatto IIIC type implicit Runge-Kutta method, which is equal to the Padé-(0,2) approximation of the exponential function. In the asymptotic range it will result in the asymptotically ...
متن کاملAn Implicit Integration Procedure for Plane Stress J2 Elastoplasticity
A stress integration algorithm for the finite-step elastoplastic constitutive equations of J2 material models under plane stress condition is presented. The procedure is referred to a two-dimensional continuum model consistently derived from the threedimensional one by implicitly fulfilling the constraint enforced by the plane stress condition. A direct exploitation of the property which charac...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Computer Methods in Applied Mechanics and Engineering
سال: 2016
ISSN: 0045-7825
DOI: 10.1016/j.cma.2016.02.025