Simulation of crack growth and crack closure under large cyclic plasticityThe propagation of a crack during cyclic loading with large plasticity was simulated using a finite element method. The numerical procedure included the determination of crack closing and opening by examining the contact condition of the crack surfaces in the plasticity iteration. The method was applied to the growth of cracks in Alloy 718 single edge notch specimens at 538 C subject to strain cycling under both nominally elastic and elastoplastic conditions. The results show, among other things, that the crack closure and opening stresses become more compressive as the loading becomes more plastic, and that, under a given control condition, the closure and opening stresses become less compressive as the crack propagates.
Document ID
19900063507
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kim, K. S. (General Electric Co. Cincinnati, OH, United States)
Van Stone, R. H. (General Electric Co. Cincinnati, OH, United States)
Laflen, J. H. (GE Aircraft Engines Cincinnati, OH, United States)
Orange, T. W. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1990
Subject Category
Structural Mechanics
Meeting Information
Meeting: ASTM National Symposium on Fracture Mechanics