Adaptive analysis based on error estimation for nonlocal damage models
Keywords:
Damage models, Nonlocal models, Error estimation, Adaptivity, Quasi-brittle mate rials, Single-edge notched bearnAbstract
An adaptive .fini te element strategy for non local damage computations is presented. The proposed approach is based on the combination of a residual-type error estimator and quadrilateral h-remeshing. A distinctive feature of the error estimator is that it consists in solving simple local problems over elements and sa-ca/led patches. The paper focuses on how the nonlocality of the constitutive mode/ should be accounted for when solving the se local problems. ft is shawn that the nonlocal damage models must be slightly modi.fied. The resulting adaptive strategy is illustrated by means of sorne numerical examples involving the single-edge notched bearn test.
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