TY - JOUR
T1 - Effect of elastic mismatch in intersonic crack propagation along a bimaterial interface
AU - Wang, W.
AU - Huang, Y.
AU - Rosakis, A. J.
AU - Liu, C.
N1 - Funding Information:
Y.H. gratefully acknowledges the support from National Science Foundation (grant no. INT-94-23964, CMS 96-10491, DMI 96-10454), Motorola Foundation and Ford Foundation. A.J.R. acknowledges the support from ONR (grant no. N00014-95-1-0453) and NSF (grant no. MSS-90-24838).
PY - 1998/11
Y1 - 1998/11
N2 - Recent experiments showed that the speed of a crack tip propagating along a bimaterial interface can exceed the shear wave speed of the more compliant constituent in the bimaterial. This experimental observation has motivated analytical and numerical investigation on fast crack growth. Among these investigations, Huang et al. obtained a simple, analytic full-field solution for an elastic/rigid bimaterial with crack-face contact. Although this solution compares quite favorably with all available experimental data, it is not clear which bimaterial can be approximated by the elastic/rigid model. In this paper, we use the method of analytical continuation to obtain the asymptotic stress fields near the crack tip and near the trailing end of the contact zone. It is established that the elastic/rigid model is an excellent approximation to all bimaterials that have been used in fast crack growth experiments. Therefore, the simple, analytic solution of elastic/rigid model provides a useful means for analyzing experimental fringe patterns and data. It is shown that, as the elastic mismatch decreases, the elastic/rigid model may become invalid.
AB - Recent experiments showed that the speed of a crack tip propagating along a bimaterial interface can exceed the shear wave speed of the more compliant constituent in the bimaterial. This experimental observation has motivated analytical and numerical investigation on fast crack growth. Among these investigations, Huang et al. obtained a simple, analytic full-field solution for an elastic/rigid bimaterial with crack-face contact. Although this solution compares quite favorably with all available experimental data, it is not clear which bimaterial can be approximated by the elastic/rigid model. In this paper, we use the method of analytical continuation to obtain the asymptotic stress fields near the crack tip and near the trailing end of the contact zone. It is established that the elastic/rigid model is an excellent approximation to all bimaterials that have been used in fast crack growth experiments. Therefore, the simple, analytic solution of elastic/rigid model provides a useful means for analyzing experimental fringe patterns and data. It is shown that, as the elastic mismatch decreases, the elastic/rigid model may become invalid.
KW - Elastic mismatch
KW - Interface
KW - Intersonic crack propagation
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U2 - 10.1016/S0013-7944(98)00089-7
DO - 10.1016/S0013-7944(98)00089-7
M3 - Article
AN - SCOPUS:0032216126
SN - 0013-7944
VL - 61
SP - 471
EP - 485
JO - Engineering Fracture Mechanics
JF - Engineering Fracture Mechanics
IS - 5-6
ER -