Dynamic Crack Curving and Crack Branching
The dynamic crack curving criterion proposed by Ramulu and Kobayashi1 is based on a micro-mechanic model of continuous micro- flaw growth and coalescence in the vicinity of the moving crack tip. It is a dynamic extension of the crack curving criterion proposed by Streit and Finnie.2 When an off-axis micro-flaw connects with the crack tip, the crack is momentarily kinked or bifurcated. Figure 1 shows several attempts for a rapidly propagating crack to branch in a Homalite-100 plate. Also shown is a successful crack branching under presumably a favorable state of stress.
KeywordsBrittle Dition Polycarbonate Terion
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