Prediction of fatigue crack-growth patterns and lives in three-dimensional cracked bodiesFatigue crack growth patterns and lives for surface cracks, surface cracks at holes, and corner cracks at holes in three dimensional bodies were predicted using linear-elastic fracture mechanics concepts that were modified to account for crack-closure behavior. The predictions were made by using stress intensity factor equations for these crack configurations and the fatigue crack-growth (delta K against rate) relationship for the material of interest. The crack configurations were subjected to constant-amplitude fatigue loading under either remote tension or bending loads. The predicted crack growth patterns and crack growth lives for aluminum alloys agreed well with test data from the literature.
Document ID
19860045267
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Newman, J. C., Jr. (NASA Langley Research Center Hampton, VA, United States)
Raju, I. S. (Vigyan Research Associates, Inc. Hampton, VA, United States)