CALCULATION OF MODE-III STRESS INTENSITY FACTOR BY BEM FOR CRACKED AXISYMMETRICAL BODIES

This paper is concerned with the numerical calculation of Mode III str ess intensity factor by BEM for cracked axisymmetric bodies, under tor sion. Mode III stress intensity factors K-III are obtained using the a symptotic displacement field in the vicinity of the crack border. The asymptotic field is derived by integration along the boundary of the m eridian of the cylinder. For traction free cracks no discretization of the crack surface was found necessary. Numerical results proving the efficiency of the proposed method are presented and compared with resu lts given in the literature and with those obtained by FEM.