Analysis of stress intensity factor for cracked flattened Brazilian disk: Part Ⅱ-mixed- mode crack

摘要

This paper presents a new method to conveniently calculate the stress intensity factors for the cracked flattened Brazilian disks under mixed-mode loading. The finite-element method is employed to confirm an assumption that the formula of the stress intensity factors for the cracked Brazilian disk subjected to pressure can be directly used to calculate the stress intensity factors for the cracked flattened Brazilian disk. The calculated results show that the assumption is valid and reliable. The calculated results also confirm that the Saint-Venant's principle is still valid in fracture mechanics. In addition, the present paper proposes a concept of optimum load distribution angle.