A Gradient-Enhanced Damage Model for Viscoplastic Thin-Shell Structures

被引：0
|
作者：
An Danh Nguyen [1 ]
Stoffel, Marcus [1 ]
Weichert, Dieter [1 ]
机构：
[1] Inst Gen Mech, D-52062 Aachen, Germany
来源：
SHELL-LIKE STRUCTURES: NON-CLASSICAL THEORIES AND APPLICATIONS | 2011年 / 15卷
关键词：
Non-local damage; Viscoplasticity; Non-linear shells; Finite element; MOMENTUM CONSERVING ALGORITHM; NONLINEAR DYNAMICS; CONSTITUTIVE-EQUATIONS; EVOLUTION; FRACTURE; ENERGY; RULES;
D O I：
10.1007/978-3-642-21855-2_17
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
A finite element model of non-local damage viscoplasticity for dynamic analysis of thin-walled shell structures is presented. To take void nucleation and growth into account, a non-local implicit gradient formulation is employed. The free energy function includes both a non-local damage variable on the mid-surface of shell structures and a local one in shell space. Local constitutive laws considering viscoplastic behavior, isotropic hardening and isotropic ductile damage leading to softening are used. The performance of the proposed approach is demonstrated through the numerical simulation of shock-wave loaded structures.
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页码：233 / 250
页数：18
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