Cohesive Discontinuities Growth Analysis using a Nonlinear Boundary Element FormulationLeonel ED* and Sergio GFC
Department of Structural Engineering, University of São Paulo, School of Engineering of São Carlos, Av. Trabalhador SãoCarlens, 400, 13566-590 São Carlos-SP, Brazil
- *Corresponding Author:
- Leonel ED
Department of Structural Engineering, University of São Paulo
School of Engineering of São Carlos, Av. Trabalhador SãoCarlens
400, 13566-590 São Carlos-SP, Brazil
Tel: +55 163373 8211
E-mail: [email protected]
Received date: May 31, 2014; Accepted date: July 07, 2014; Published date: July 10, 2014
Citation: Leonel ED, Sergio GFC (2014) Cohesive Discontinuities Growth Analysis using a Nonlinear Boundary Element Formulation. J Appl Computat Math 3: 172. doi: 10.4172/2168-9679.1000172
Copyright: © 2014 Leonel ED, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
The present work deals the development of a nonlinear numerical model for structural analysis of solids composed by multi-domains considering cohesive discontinuities along its interfaces. The numerical method adopted is the boundary element method (BEM), through its singular and hyper–singular integral equations. Due to the mesh dimensionality reduction provided by BEM, this numerical method is robust and accurate for analyzing the fracture process in solids, as well as physical nonlinearities that occurs along the body’s boundaries. Multi-domain structures are modelled considering the sub-region technique, in which both equilibrium of forces and compatibility of displacements are enforced along all interfaces. The crack propagation process is simulated by the fictitious crack model, in which the residual resistance of the region ahead the crack tip is represented by cohesive tractions. It leads to a nonlinear problem relating the tractions at cohesive interface cracks to its crack opening displacements. The implemented formulation is applied to analysis of three examples. The numerical responses achieved are compared to numerical and experimental solutions available in literature in order to show the robustness and accuracy of the formulation.