A multi-level superelement technique for damage analysis

J. P. Fan, Chak Yin Tang, C. L. Chow

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

A multi-level superelement technique is applied to model the effects of circular voids on the effective elastic properties of a material. A two-dimensional representative volume element with a circular void in its center is initially modeled by a superelement. Using this superelement, a thin planar material with circular voids is constructed. The finite element computation is then conducted to estimate the effective Young.s modulus, Poisson.s ratio and the shear modulus of the material using the ABAQUS code for different void sizes. The values of the isotropic damage variables, DE and D G, under various degree of damage are hence determined. These values are compared with those calculated by using a conventional micromechanics damage model. A new isotropic damage model is proposed based on the results of this analysis. To demonstrate the applicability of this damage model, an example case of a notched cylindrical bar under tensile loading is investigated.
Original languageEnglish
Title of host publicationMaterials
Subtitle of host publicationProcessing, Characterization and Modeling of Novel Nano-Engineered and Surface Engineered Materials
PublisherAmerican Society of Mechanical Engineers (ASME)
Pages215-220
Number of pages6
ISBN (Print)0791836401, 9780791836408
DOIs
Publication statusPublished - 1 Jan 2002

ASJC Scopus subject areas

  • Mechanical Engineering

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