S. Lahiri et al., EVALUATION OF BIMATERIAL STRESS INTENSITY FACTORS USING A FINITE-ELEMENT BOUNDARY-ELEMENT ALTERNATING METHOD, Engineering fracture mechanics, 53(2), 1996, pp. 289-302
The finite element-boundary element alternating method is extended to
the analysis of a crack in a bimaterial test specimen. The crack is pe
rpendicular to, and terminates at, the interface between two dissimila
r materials. The finite element method is used to model the finite-siz
e specimen without the crack. The displacement discontinuity method (b
oundary element method) is used to find the stresses in the infinite b
imaterial medium due to crack surface tractions. The stress intensity
factors are extracted by using a closed form solution for a semi-infin
ite crack in an infinite bimaterial medium opened by a pair of wedge f
orces. The alternating method is verified by solving several bimateria
l crack problems for which solutions are known. A parametric study is
performed for a specimen proposed for evaluating the fracture toughnes
s of bimaterial interfaces.