LARGE-STRAIN FIELD NEAR AN INTERFACE CRACK-TIP

In this paper the elastostatic field near the tip of an interface crac k between two materials is analyzed with the fully nonlinear theory. B y dividing the crack tip field into narrowing sectors and an expanding sector, the asymptotic equations for the crack tip field are derived and solved. The singular characters of stress and strain near the crac k tip are revealed. The crack opening shape is discussed for various c ases. It is shown that when large deformation is taken into account th e oscillatory singularity does not occur.