Single and Double Edge Interface Cracks in a Bonded Plate under Arbitrary Material Combination

Xin Lan; Naoaki Noda; Yu Zhang; Mitinaka Kengo

doi:10.4028/www.scientific.net/KEM.452-453.245

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Single and Double Edge Interface Cracks in a Bonded Plate under Arbitrary Material Combination
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HomeKey Engineering MaterialsKey Engineering Materials Vols. 452-453Single and Double Edge Interface Cracks in a...

Single and Double Edge Interface Cracks in a Bonded Plate under Arbitrary Material Combination

Abstract:

Although a lot of interface crack problems were previously treated, few solutions are available under arbitrary material combinations. This paper deals with a single edge interface crack as well as a double edge interface crack in a bonded plate. Then, the effects of material combination on the stress intensity factors are discussed. A useful method to calculate the stress intensity factor of interface crack is presented with focusing on the stresses at the crack tip calculated by the finite element method. Then, the stress intensity factors are indicated in charts under arbitrary material combinations. Specifically, some necessary skills as refined mesh and extrapolations of the stress intensity factors are used to improve the accuracy of the calculation. It has been proved that the values shown in this paper have at least 3-digit accuracy. For the edge interface crack, it is found that the dimensionless stress intensity factors are not always finite depending on Dunders’ parameters , . For example, they are infinite when . And they are finite when , and zero when .