FRACTURE PARAMETERS DETERMINATION FOR THIN DEFECTS: BEM APPROACH FOR AXISYMMETRIC ELASTICITY

摘要

Novel self-regular (and continuous to the boundary) stress integral equations are obtained. Singular and hypersingular integrals are both regularized using the imposition of simple polynomial solution. For determination of generalized stress intensity factors a number of techniques are proposed. Two of them are based on the energy integrals approach, which utilize the relationship between J-integral and generalized stress intensity factors. Besides this the new relation between axisymmetric M-integral and generalized stress intensity factors is obtained. Also the stress field approximation approach is adopted.