SEDL / STP / STP1074-EB / STP19002S

Evaluation of Elastic-Plastic Surface Flaw Behavior and Related Parameters Using Surface Displacement Measurements

Lloyd, WR
Idaho National Engineering Laboratory, EG&G Idaho, Inc., Idaho Falls, ID

Reuter, WG
Idaho National Engineering Laboratory, EG&G Idaho, Inc., Idaho Falls, ID

Pages: 15    Published: Jan 1990

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Abstract

Surface displacement measurements on surface cracked plate specimens loaded in tension were recorded using geometric moiré. An algorithm based on the displacements predicted by HRR fields was developed by the authors and used to evaluate the value of the applied J-integral at the crack border/free surface intersection point at various levels of applied remote stress. The values of J calculated in this manner were found to be in good agreement with predictions by Parks obtained from a nonlinear three-dimensional finite element model (ABAQUS).