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In this paper incubation time fracture criterion is applied to perform numerical
investigation of relation between stress intensity factor (SIF) and crack velocity observed in
experiments by J.F. Kalthoff [1] for Araldite B. Two sample geometries were studied - double
cantilever beam (DCB) and single edge notched sample (SEN). Quasistatic loading of these
samples revealed existence of two branches of stress intensity factor - crack speed dependence
corresponding to each sample geometry. Finite element method was used to perform numerical
simulations of experiments by J.F Kalthoff and to study non-unique SIF - crack speed
dependence.
Keywords: a dynamically propagating crack; stress intensity factor; crack velocity. |
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