COMPUTATION OF THE WEIGHT FUNCTION FROM A STRESS INTENSITY FACTOR.
A simple representation for the crack-face displacement is used to compute a weight function solely from stress intensity factors for a reference loading configuration. Crack-face displacements given by the representation are shown to be in good agreement with analytical results for cracked tensile strips, and stress intensity factors computed from the weight function agree well with those for edge cracks in half-planes, radial cracks from circular holes, and radially cracked rings. The technique involves only simple quadrature, and its efficacy is demonstrated by the example computations. The weight funcion for a corner crack in an LMFBR hexagonal subassembly duct is constructed from stress-intensity-factor results for the uniformly overpressurized case, and it is shown how this may be used to determine the stress intensity factors for other loading cases.
Petroski, HJ; Achenbach, JD
Rep (ANL-77-82) (Contract W-31-109-ENG-38)