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On the applicability of JR0 integral for perpendicular interface crack

✍ Scribed by Chen Wen-Hwa; Chen Kuen-Tsann; Chiang Chun-Ron

Publisher
Elsevier Science
Year
1988
Tongue
English
Weight
561 KB
Volume
30
Category
Article
ISSN
0013-7944

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✦ Synopsis

Further studies on the applicability of the JR0 integral established in the authors' earlier work are presented in this work using detailed numerical experiments. Based on a developed hybrid displacement finite element model for bimaterial fracture problems, the JR,, integral for perpendicular interface crack is computed and averaged by four different integral I paths chosen and the path independency of JRJRo-2* is noted. R. is the radius of a properly selected integration path. In addition, the stress intensity factor for a bimaterial composite Ks can be accurately inferred from the JR0 integral through the relation J&, = KiR,'-2A[(1 -u2)/2~&f. H is a function of bimaterial constants. v2 and pz are the Poisson's ratio and shear modulus of the material which does not contain the considered crack. Thus, the J&R,!-'*

integral could be served as a sound fracture parameter for a perpendicular interface crack.

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