Authors: W Weber P Steinmann G Kuhn
Publish Date: 2008/07/17
Volume: 149, Issue: 2, Pages: 175-
Abstract
The continuous growth of 3D cracks under cyclic loading conditions is considered within a discrete simulation procedure It is performed within the framework of linear elastic fracture mechanics An incremental procedure is applied to consider the nonlinear behavior of crack growth within the simulation In each increment the direction and magnitude of the crack propagation for each point along the crack front are needed to define the new crack front Within the present context the crack deflection results from the maximum tangential stress criterion and the crack extension is obtained by the evaluation of a crack propagation rate To simulate the crack propagation as exactly as possible the evolution of the stress field between two consecutive crack fronts is taken into account The analysis of the changing stress field is utilized for optimization of the predicted crack fronts The whole procedure is realized in terms of a predictor–corrector scheme Numerical examples are presented to demonstrate the benefits of this concept
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