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A finite element analysis of continuum damage mechanics for ductile fracture

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Abstract

A finite element formulation of an anisotropic theory of continuum damage mechanics for ductile fracture is presented. The formulation is based on a generalized model of anisotropic continuum damage mechanics of elasticity and plasticity proposed earlier by the authors. The validity of the proposed anisotropic damage model and finite element formulation is verified by comparing the predicted fracture load of center-cracked tension specimen made of thin aluminium alloy 2024-T3 with those determined experimentally and excellent agreement is achieved. The proposed finite element analysis can thus provide an important design tool to solve practical problems of engineering significance which may have hitherto been found difficult using the conventional fracture mechanics concept.

Résumé

On présente une formulation par éléments finis d'une théorie anisotrope de la mécanique d'endommagement d'un continuum, applicable aux ruptures ductiles. Cette formulation est basées sur la généralisation d'un modèle de mécanique d'endommagement d'un continuum anisotrope pour l'élasticité et la plasticité, proposé précédemment par les auteurs. On vérifie la validité du modèle d'endommagement anisotrope proposé et de sa formulation par éléments finis, en comparant aux valeurs expérimentales la charge de rupture prévue pour une éprouvette mince de traction d'alliage d'aluminium 2024-T3 présentant une fissure centrale. On trouve un excellent accord. L'analyse par éléments finis proposée peut ainsi constituer un outil de conception important pour résoudre des problèmes pratiques de construction que l'on aurait trouvé difficiles à traiter par les concepts de la mécanique de rupture traditionnelle.

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Author notes

  1. June Wang

    Present address: Huazhong University of Science and Technology, China

Authors and Affiliations

  1. Department of Mechanical Engineering, University of Hong Kong, Hong Kong

    C. L. Chow & June Wang

Authors
  1. C. L. Chow
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  2. June Wang
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Chow, C.L., Wang, J. A finite element analysis of continuum damage mechanics for ductile fracture. Int J Fract 38, 83–102 (1988). https://doi.org/10.1007/BF00033000

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  • DOI: https://doi.org/10.1007/BF00033000

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