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Explicit boundary element modeling of nonlocal damage with Eshelby theory

Engineering Analysis with Boundary Elements • 2021
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Publication Information
Authors M. A. Kamal Ahmed Fady Farid and Youssef F. Rashed
Keywords Nonlocal damage mechanicsQuasi-brittle materialsBoundary element methodEigenstrainEshelby's equivalent inclusionsNonlinear analysis
Journal Engineering Analysis with Boundary Elements
Publisher Elsevier
Volume 131
Issue 1
Pages 64-75
publication.type International
Paper Link Open Link
Supplementary Materials Not Available
Abstract
Modeling nonlinearities, including damage, in the boundary element method (BEM) is usually carried out in implicit way, or in other words via applying initial stresses or strains over a discretized domain part. Such initial values have no physical meaning. They are only used to compensate the stress level due to the occurred nonlinearity. In this paper explicit implementation of nonlocal damage is proposed. The damaged points inside the domain is physically weakened by decreasing their modulus of elasticity. With the help of Eshelby's equivalent inclusion theory, this idea is developed and implemented in this work. Load control solution algorithm is used. Both average strain and average damage nonlocal models are considered. Numerical examples are presented to verify the developed formulation. Factors that affect the solution accuracy are studied in details.