SEDL / STP / STP1060-EB / STP23430S

Optical and Finite-Element Investigation of a Plastically Deformed Surface Flaw Under Tension

Olinkiewicz, JC
Research assistant, research assistant, and leading professor, Laboratory for Experimental Mechanics Research, State University of New York at Stony Brook, Stony Brook, NY

Tippur, HV
Research assistant, research assistant, and leading professor, Laboratory for Experimental Mechanics Research, State University of New York at Stony Brook, Stony Brook, NY

Chiang, FP
Research assistant, research assistant, and leading professor, Laboratory for Experimental Mechanics Research, State University of New York at Stony Brook, Stony Brook, NY

Pages: 18    Published: Jan 1990

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Abstract

A combined moiré method has been used to experimentally obtain three-dimensional surface deformations in a plastically deformed tensile strip containing a surface flaw. A finite-element approach using experimentally obtained displacements as boundary conditions is followed to investigate the interior deformation fields and to study several parameters of interests such as J, crack-tip singularity and J, crack-mouth opening displacement equivalence for a chosen specimen geometry.