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Communications on Pure and Applied Mathematics
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Concentration versus Oscillation Effects in Brittle Damage

Concentration versus oscillation effects in brittle damage
Authors: Babadjian J-F; Iurlano F; Rindler F;

Concentration versus Oscillation Effects in Brittle Damage

Abstract

AbstractThis work is concerned with an asymptotic analysis, in the sense of Γ‐convergence, of a sequence of variational models of brittle damage in the context of linearized elasticity. The study is performed as the damaged zone concentrates into a set of zero volume and, at the same time and to the same order ε, the stiffness of the damaged material becomes small. Three main features make the analysis highly nontrivial: at ε fixed, minimizing sequences of each brittle damage model oscillate and develop microstructures; as ε → 0, concentration and saturation of damage are favoured; and the competition of these phenomena translates into a degeneration of the growth of the elastic energy, which passes from being quadratic (at ε fixed) to being of linear‐growth type (in the limit). Consequently, homogenization effects interact with singularity formation in a nontrivial way, which requires new methods of analysis. In particular, the interaction of homogenization with singularity formation in the framework of linearized elasticity appears to not have been considered in the literature so far. We explicitly identify the Γ‐limit in two and three dimensions for isotropic Hooke tensors. The expression of the limit effective energy turns out to be of Hencky‐plasticity type. We further consider the regime where the divergence remains square‐integrable in the limit, which leads to a Tresca‐type model. © 2020 Wiley Periodicals, Inc.

Countries
France, France, Italy
Keywords

Hencky plasticity, Anelastic fracture and damage, homogenization, singularity formation, Brittle damage, asymptotic analysis, Mathematics - Analysis of PDEs, limit effective energy, FOS: Mathematics, Homogenization, determination of effective properties in solid mechanics, Equations linearized about a deformed state (small deformations superposed on large), gamma-convergence, linearized elasticity, [MATH.MATH-AP] Mathematics [math]/Analysis of PDEs [math.AP], QA, variational model, Analysis of PDEs (math.AP)

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
8
Top 10%
Average
Average
Green
bronze
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