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Numerical Simulations of Dynamic Fracture
Last modified: 2013-05-07
Abstract
On the basis of the incubation time approach in dynamic fracture
introduced into the finite element method different classes of dynamic fracture
experiments are simulated and analyzed. It will be shown that all the variety of
phenomena observed in these experiments can be obtained numerically using the
incubation time fracture criterion. It will be shown that computed crack extension
histories are coinciding with ones observed experimentally. It will be
demonstrated that the dynamic stress intensity factor can be unambiguously
coupled with the crack speed in some experiments (when dynamic crack is
initiated by quasistatic loads ex. Shockey, Kalthoff). At the same time in other
experiments, when the crack is initiated by dynamic high rate loads (ex. Ravi-
Chandar and Knauss), SIF can change independently from the crack speed. This
connection between the SIF in the tip of a moving crack and the speed of the
crack will be extensively discussed.
introduced into the finite element method different classes of dynamic fracture
experiments are simulated and analyzed. It will be shown that all the variety of
phenomena observed in these experiments can be obtained numerically using the
incubation time fracture criterion. It will be shown that computed crack extension
histories are coinciding with ones observed experimentally. It will be
demonstrated that the dynamic stress intensity factor can be unambiguously
coupled with the crack speed in some experiments (when dynamic crack is
initiated by quasistatic loads ex. Shockey, Kalthoff). At the same time in other
experiments, when the crack is initiated by dynamic high rate loads (ex. Ravi-
Chandar and Knauss), SIF can change independently from the crack speed. This
connection between the SIF in the tip of a moving crack and the speed of the
crack will be extensively discussed.
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