ANISOTROPIC PLASTIC FIELDS AT A RAPIDLY PROPAGATING CRACK-TIP

Under the condition that all the stress components at a crack-tip are the functionsofθonly,making use of the equations of steady-state motion,stress-strain relationsand Hill anisotropic yield conditions,we obtain the general solutions at a crack-tip inboth the cases of anti-plane and in-plane strains.Applying these general solutions tothe concrete cracks,the anisotropic plastic fields at the rapidly propagating tips ofmodeⅢand modeⅠcracks are derived.