Numerical Evaluation of Energy Release Rates

by Pedro M. Vargas, Univ of Illinois, United States,
Robert H. Dodds, Jr., Univ of Illinois, United States,



Document Type: Proceeding Paper

Part of: Structural Materials

Abstract:

Numerical studies are described that evaluate the total energy release rate, G_T, for quasi-static, Mode I cracks using two-dimensional finite-element models. Attention here focuses on numerical schemes to evaluate the domain (area) integrals that arise from thermal and path dependent (incremental) plastic strains. Two methods for numerically evaluating these integrals are investigated. Comparative analyses are performed for a single edge notch (SEN) tensile specimen. Both path-dependent (incremental) plasticity and deformation (nonlinear-elastic) plasticity are considered.

Subject Headings: Finite element method | Numerical analysis | Two-dimensional models | Plasticity | Numerical methods | Cracking | Integrals

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