Using a sub-regional boundary element method, an algorithm for the two-dimensionalelastic bodies with a closed crack loaded by a moving contact elastic body is proposed. Since the extentand status of the contact surface of two elastic bodies and the crack within the body are all not knownin advance, a double iterative contact algorithm is used. The BEM program for solving the closedcrack problems is developed, some numerical examples are calculated, and the results of the centercrack cases are shown to be in good agreement with the analytical solution in the classical fracturemechanics. In the condition of friction and non-friction, some coupling computational results of theSIF for the closed crack, with different angles and loaded by a moving contact elastic body, are alsoobtained by a numerical computation.
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