STRESS INTENSITY FACTORS FOR EXTERNAL AND PENNY-SHAPED CRACKS IN TRANSVERSELY ISOTROPIC CYLINDERS SUBJECTED TO THERMAL-SHOCK

The paper discusses stress intensity factors for two thermal shock pro blems in transversely isotropic cylinders which contain either an exte rnal annular crack or a penny-shaped crack. The thermal stress field i s analyzed by means of the potential function method for transversely isotropic solids. A method of successive approximation together with t he Fourier integral and the Bessel series are used to satisfy the boun dary conditions. Numerical calculations of the stress intensity factor s are carried out for a beryllium oxide cylinder, which possesses tran sverse isotropy. The maximum stress intensity factors with respect to a time variable are approximated by a function of Biot's number and cr ack length.