A Self-Consistent Analysis for Coupled Elastoplastic Damage Problems
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摘要: 基于不可逆热力学理论和内变量理论,提出平均意义下的Clausius-Duhem不等式方程.与以往弹塑性空洞损伤研究不同,本文旨在利用自洽分析法建立起既考虑空洞形状影响又考虑空洞之间相互作用的场方程,并使之能够处理空洞体积比较大的弹塑性损伤问题.Abstract: Based on irreversible thermodynamics and internal state variable theory,the volnme-averaged Clausius-Duhem inequality is presented,In contrast to former investigations on damage-elastoplasticity,our evalustions are founded on the volume-averaged field equations of the analyzed elements and the self-consistent method.Hence,our results not only include the influence of void shapes but also consider the interaction among voids.Further,previous work about coupled elastoplastic damage problems only takes into account small initial void volume fractions.Our work,however,will be able to deal with elastoplastic damage problems with larger initial void volume fractions.
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Key words:
- elastoplastic damage /
- self-consistent method /
- law of thermodynamics /
- inclusions
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[1] Huang Mojia and H.Buffer,On a self-consistent method to the analyses of elasto-plastic materials with inclusions,Z.Ange.Math.Mech.,76,8(1996),427-437. [2] J.Lemaitre,Coupled elasto-plasticity and damage constitutive equations,Comput.Methods Appl.Mech.Engrg.,51,1(1985),31-49. [3] J.L.Chaboche,Continuum damage mechanics:Part Ⅰ──General concepts,J.Appl.Mech.,55,1(1988).59-64. [4] J.L.Chaboche,Continuum damage mechanics: Part Ⅱ──Damage growth,crack initiation,and crack growth,J.Appl.Mech.,55,1(1988),65-72. [5] J.C.Simo and J.W.Ju,Stress and strain based continuum damage models──Ⅰ,Formulation,Internat.J.Solids Structures,23,7(1987),821-840. [6] J.C.Simo and J.W.Ju.Stress and strain based continuum damage models──Ⅱ,Computational aspects,Internat.J.Solids Structures,23,7(1987).841-869. [7] J.W.Ju,On energy-based coupled elastoplastic damage theories: Constitutive modeling and computational aspects,Internat.J.Solids Structures,25,7(1989),803-833. [8] G.Rousselier,Finite deformation constiutive relations including ductile fracture damage,Three-Dimensional Constitutive Relations and Ductile,(Edited by S.NematNasser),North-Holland Publishing Company(1981),331-355. [9] J.Koplik and A.Needleman,Void growth and coalescence in porous plastic solid,Internat.J.Solids Structures,24,8(1988),835-853.
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