Evaluation of stress field parameters in fracture mechanics by photoelasticity—Revisited

Multi-parameter stress field equations have been reported in the past two decades to model the elastic stress field in the neighbourhood of a crack lying in finite bodies. Notably among them are the generalised Westergaard equations proposed by Sanford, Williams' eigen function expansion and the recent one of Atluri and Kobayashi. The equivalence among these equations is brought out. Using the equations of Atluri and Kobayashi an...