Plane-stress fracture of compact and notch-bend specimensThin-gaged or high toughness materials containing cracks usually fail in a ductile manner with nominal failure stresses approaching the ultimate strength of the material. For such materials, a two-parameter fracture criterion was developed. An equation which related the linear elastic stress-intensity factor, elastic nominal stress, and two material parameters has previously been derived and has been used as a fracture criterion for surface- and through-cracked specimens under tensile loading. In the present paper the two-parameter fracture criterion was rederived in a more general form and was extended to compact and notch-bend fracture specimens. A close correlation was found between experimental and calculated failure stresses.
Document ID
19770057026
Acquisition Source
Legacy CDMS
Document Type
Other - Collected Works
Authors
Newman, J. C., Jr. (NASA Langley Research Center Hampton, Va., United States)