Abstract
Dynamic fracture behaviour of crack curving in bent beams has beeninvestigated.In order to understand the propagation mechanism of such cracks underimpact,an experimental method is used that combines dynamic photoelasticity withdynamic caustics to study the interaction of the flexural waves and the crack.Fromthe state change of the transient stresses in polymer specimen,the curving fracturein the impulsively loaded beams is analyzed.The dynamic responses of crack tips areevaluated by the stress intensity factors for the cracks running in varying curvaturepaths under bending stress wave.
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