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Paper VII.4

Coupling of a Micromechanically based Void Growth Model with a Macrocrack Model for the Simulation of Damage Evolution in Ductile Materials

doi:10.4203/ccp.24.7.4

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C. Könke, "Coupling of a Micromechanically based Void Growth Model with a Macrocrack Model for the Simulation of Damage Evolution in Ductile Materials", in B.H.V. Topping, M. Papadrakakis, (Editors), "Advances in Non-Linear Finite Element Methods", Civil-Comp Press, Edinburgh, UK, pp 205-219, 1994. doi:10.4203/ccp.24.7.4

Abstract

This paper presents a way to simulate damage evolution for metal materials under large displacements and large deformations. The complete damage range is divided into a micro-damage and a macro-damage range. The micro-damage phase is described by the Cocks/Ashby void-growth model for isotropic, ductile materials under isothermal conditions. After reaching a critical void-volume fraction a macro crack is introduced into the model. Therewith it is possible to simulate damage evolution from nucleation and growth of first micro-voids to initiation of macro cracks and complete failure of the material. The Finite Element Method is used for the numerical formulation. For every incremental macro crack step a special mesh is constructed. Therewith the crack path remains independent of the initial FE-mesh.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 24 ADVANCES IN NON-LINEAR FINITE ELEMENT METHODS Edited by: B.H.V. Topping and M. Papadrakakis Paper VII.4 Coupling of a Micromechanically based Void Growth Model with a Macrocrack Model for the Simulation of Damage Evolution in Ductile Materials C. Könke Institute for Statics and Dynamics, Ruhr University Bochum, Bochum, Germany doi:10.4203/ccp.24.7.4 purchase the full-text of this paper Full Bibliographic Reference for this paper C. Könke, "Coupling of a Micromechanically based Void Growth Model with a Macrocrack Model for the Simulation of Damage Evolution in Ductile Materials", in B.H.V. Topping, M. Papadrakakis, (Editors), "Advances in Non-Linear Finite Element Methods", Civil-Comp Press, Edinburgh, UK, pp 205-219, 1994. doi:10.4203/ccp.24.7.4 Abstract This paper presents a way to simulate damage evolution for metal materials under large displacements and large deformations. The complete damage range is divided into a micro-damage and a macro-damage range. The micro-damage phase is described by the Cocks/Ashby void-growth model for isotropic, ductile materials under isothermal conditions. After reaching a critical void-volume fraction a macro crack is introduced into the model. Therewith it is possible to simulate damage evolution from nucleation and growth of first micro-voids to initiation of macro cracks and complete failure of the material. The Finite Element Method is used for the numerical formulation. For every incremental macro crack step a special mesh is constructed. Therewith the crack path remains independent of the initial FE-mesh. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £68 +P&P)
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