A methodology for the simulation of quasi-static cohesive crack propagation in quasi-brittle materials is presented. In the framework of the recently proposed extended nite element method, the partition of unity property of nodal shape functions has been exploited to introduce a higher-order displacement discontinuity in a standard nite element model. In this way, a cubic displacement discontinuity, able to reproduce the typical cusp-like shape of the process zone at the tip of a cohesive crack, is allowed to propagate without any need to modify the background nite element mesh. The eectiveness of the proposed method has been assessed by simulating mode-I and mixed-mode experimental tests.

Extended finite element method for quasi-brittle fracture

MARIANI, STEFANO;PEREGO, UMBERTO
2003-01-01

Abstract

A methodology for the simulation of quasi-static cohesive crack propagation in quasi-brittle materials is presented. In the framework of the recently proposed extended nite element method, the partition of unity property of nodal shape functions has been exploited to introduce a higher-order displacement discontinuity in a standard nite element model. In this way, a cubic displacement discontinuity, able to reproduce the typical cusp-like shape of the process zone at the tip of a cohesive crack, is allowed to propagate without any need to modify the background nite element mesh. The eectiveness of the proposed method has been assessed by simulating mode-I and mixed-mode experimental tests.
2003
quasi-brittle fracture; extended nite element method
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/556313
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