Abstract
A multi-region boundary element method (BEM) based on the modified crack closure method (CCM) is developed to obtain the energy release rate G for cracks in homogeneous materials and along a bimaterial interface. The energy release rate obtained using the CCM are compared with that obtained using the crack opening displacement (COD) method. A combination of these methods allows us to determine the phase angle ψ and therefore the complex stress intensity factor K for crack problems. We access the accuracy of our BEM by comparing its results with known analytic solutions and previous FEM results in the literature. Computations are also carried out for the asymmetric double cantilever beam (ADCB) specimen, which has been used to determine fracture toughness of polymer/polymer and polymer/nonpolymer interfaces. An auxiliary K A field method to evaluate K is also discussed.
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Communicated by S. N. Atlrui, 25 April 1994
This work is supported by the Cornell Materials Science Center (MSC) which is funded by the National Science Foundation (DMR-MRL program).
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Xiao, F., Hui, C.Y. A boundary element method for calculating the K field for cracks along a bimaterial interface. Computational Mechanics 15, 58–78 (1994). https://doi.org/10.1007/BF00350289
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DOI: https://doi.org/10.1007/BF00350289