Stress intensity factors for internal circular cracks in fibers under tensile loading

Stress intensity factors for inner circular cracks placed eccentrically in a fiber with round cross section were computed and are presented in this paper in both analytical and graphical form. The crack plane was perpendicular to the fiber axis and remote tensile loading was assumed. The stress intensity factors were numerically computed using the finite element method. Mesh objectivity and some other aspects of computational precision are considered. The asymptotic behaviour when the crack size and the ligament depth vanish were considered in order to formulate accurate interpolation expressions.