Nonlocal integral formulations of plasticity and damage: survey of progress

ZP Bažant, M Jirásek - Journal of engineering mechanics, 2002 - ascelibrary.org
Modeling of the evolution of distributed damage such as microcracking, void formation, and
softening frictional slip necessitates strain-softening constitutive models. The nonlocal …

Strain gradient continuum plasticity theories: theoretical, numerical and experimental investigations

GZ Voyiadjis, Y Song - International Journal of Plasticity, 2019 - Elsevier
Over the last three decades, a number of researchers have used the gradient-enhanced
plasticity theory to model the microstructural material behavior, which is not able to be …

Filters in topology optimization based on Helmholtz‐type differential equations

BS Lazarov, O Sigmund - International journal for numerical …, 2011 - Wiley Online Library
The aim of this paper is to apply a Helmholtz‐type partial differential equation as an
alternative to standard density filtering in topology optimization problems. Previously, this …

Nonlocal constitutive relation for steady granular flow

K Kamrin, G Koval - Physical review letters, 2012 - APS
Extending recent modeling efforts for emulsions, we propose a nonlocal fluidity relation for
flowing granular materials, capturing several known finite-size effects observed in steady …

Micromorphic approach for gradient elasticity, viscoplasticity, and damage

S Forest - Journal of Engineering Mechanics, 2009 - ascelibrary.org
A unifying thermomechanical framework is presented that reconciles several classes of
gradient elastoviscoplasticity and damage models proposed in the literature during the last …

Multi-scale second-order computational homogenization of multi-phase materials: a nested finite element solution strategy

VG Kouznetsova, MGD Geers… - Computer methods in …, 2004 - Elsevier
This paper presents the detailed implementation and computational aspects of a novel
second-order computational homogenization procedure, which is suitable for a multi-scale …

[图书][B] Non-linear mechanics of materials

J Besson, G Cailletaud, JL Chaboche, S Forest - 2009 - books.google.com
In mechanical engineering and structural analysis there is a significant gap between the
material models currently used by engineers for industry applications and those already …

Localizing gradient damage model with decreasing interactions

LH Poh, G Sun - International Journal for Numerical Methods in …, 2017 - Wiley Online Library
Nonlocal integral and/or gradient enhancements are widely used to resolve the mesh
dependency issue with standard continuum damage models. However, it is reported that …

Comparison of integral-type nonlocal plasticity models for strain-softening materials

M Jirásek, S Rolshoven - International Journal of Engineering Science, 2003 - Elsevier
The paper analyzes and compares a number of softening plasticity models regularized by
nonlocal averaging. To highlight the fundamental properties and gain insight into the …

[HTML][HTML] Gradient plasticity theory with a variable length scale parameter

GZ Voyiadjis, RKA Al-Rub - International Journal of solids and structures, 2005 - Elsevier
The definition and magnitude of the intrinsic length scale are keys to the development of the
gradient plasticity theory that incorporates size effects. However, a fixed value of the material …