On the implementation of rate-independent standard dissipative solids at finite strain – Variational constitutive updates
نویسندگان
چکیده
منابع مشابه
Variational Constitutive Updates for Strain Gradient Isotropic Plasticity
In the past decades, various strain gradient isotropic plasticity theories have been developed to describe the size-dependence plastic deformation mechanisms observed experimentally in micron-indentation, torsion, bending and thin-film bulge tests in metallic materials. Strain gradient plasticity theories also constitute a convenient device to introduce ellipticity in the differential equations...
متن کاملThe Variational Formulation of Viscoplastic Constitutive Updates
We present a class of constitutive updates for general viscoplastic solids including such aspects of material behavior as nite elastic and plastic deformations, non-Newtonian viscosity, rate-sensitivity and arbitrary ow and hardening rules. The distinguishing characteristic of the proposed constitutive updates is that, by construction, the corresponding incremental stress-strain relations deriv...
متن کاملThe Variational Formulation of Viscoplastic Constitutive Updates
We present a class of constitutive updates for general viscoplastic solids including such aspects of material behavior as nite elastic and plastic deformations, non-Newtonian viscosity, rate-sensitivity and arbitrary ow and hardening rules. The distinguishing characteristic of the proposed constitutive updates is that, by construction, the corresponding incremental stress-strain relations deriv...
متن کاملGlobal Existence for Rate-Independent Gradient Plasticity at Finite Strain
We provide a global existence result for the time-continuous elastoplasticity problem using the energetic formulation. For this we show that the geometric nonlinearities via the multiplicative decomposition of the strain can be controlled via polyconvexity and a priori stress bounds in terms of the energy density. While temporal oscillations are controlled via the energy dissipation the spatial...
متن کاملRate dependent finite strain constitutive model of polyurea
Article history: Received 7 October 2009 Received in final revised form 7 October 2010 Available online 16 October 2010
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: 2010
ISSN: 0045-7825
DOI: 10.1016/j.cma.2009.07.006