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Numerical simulation of quasi-brittle fracture using damaging cohesive surfaces. (English) Zbl 0993.74073
Summary: We employ the cohesive surface methodology in a numerical study of fracture of concrete. The traction vs. separation response is governed by an isotropic damage law in which damage evolves according to a prescribed one-dimensional linear or exponential softening law. Cohesive surfaces are immersed in the continuum to allow for a maximum freedom of crack path selection. The single edge notched four point shear beam and the double edge notched tensile bar are used to study: (i) the influence of tangential cohesive response on the development of fracture path, and (ii) the mesh alignment sensitivity. It is shown that the tangential cohesive response has a minor influence on both crack path and global characteristics. Mesh alignment has a significant influence on the outcome of numerical analysis.

MSC:
74S05 Finite element methods applied to problems in solid mechanics
74R10 Brittle fracture
74K10 Rods (beams, columns, shafts, arches, rings, etc.)
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