Abstract
The newly derived dynamic-crack-branching criterion with its modifications is verified by the dynamicphotoelastic results of dynamic crack branchings in thinpolycarbonate, single-edged crack-tension specimens. Successful crack branching was observed in four specimens and unsuccessful branching in another. Crack branching consistently occurred when the necessary conditions ofK I =K I b =3.3 MPa\(\sqrt m\) and the sufficiency condition ofr o =r c =0.75 mm were satisfied simultaneously. In the unsuccessful branching test, the necessary condition was not satisfied sinceK I was always less thanK I b .
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Ramulu, M., Kobayashi, A.S., Kang, B.S.J. et al. Further studies on dynamic crack branching. Experimental Mechanics 23, 431–437 (1983). https://doi.org/10.1007/BF02330060
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DOI: https://doi.org/10.1007/BF02330060