Abstract
The use of weight functions is a well-established technique for the solution of mechanics problems in structural engineering. Increasing use of these techniques is being made to solve crack problems. The special feature of crack problems in elasticity is the presence of a singular stress field at the crack-tip. The incorporation of certain fundamental singular fields into the boundary element formulation enables weight functions for the stress intensity factors to be obtained on all the boundaries of a cracked body from a single boundary element calculation. With these weight functions the stress intensity factor for any loading on any boundary of the body can be obtained from a simple integration.
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