Rectification of Oblique Cracks in Fracture Toughness Testing
Tóm tắt
A technique for rectification of oblique crack fronts is described. It involves out-of-plane bending fatigue loading of the specimens. The method can be valuable in cases when residual stresses or other causes precludes a straight crack front being produced by standard fatigue loading in the process of preparing specimens for fracture toughness testing.
Tài liệu tham khảo
ASTM E 1737, Standard test method for J Ic, a measure of fracture toughness”. Annual Book of ASTM standards, Vol. 03. 01, American Society for Testing and Materials, West Conshohoken, Pa.
Wilson, W. K. and D. G. Thompson, “On the finite element method for calculating stress-intensity factors for cracked plates in bending”, Engineering Fracture Mechanics, 3, 1971, p. 97–102.