Analysis of a Novel Fracture Toughness Testing Geometry

Report No. ARL-TR-6266
Authors: Bryan M. Love
Date/Pages: December 2012; 30 pages
Abstract: Computational analyses were conducted on novel fracture toughness specimens known as butterfly specimens, which were developed at the U.S. Army Research Laboratory. A three-dimensional (3-D), J-integral technique was established and validated against published results for a simple geometry. The technique was then used to generate a stress intensity factor function for a range of geometries for the butterfly specimen. A displacement-based description of the load on the specimen was developed that removes the need to accurately determine the specimen/platen frictional effects, and 3-D analyses were conducted to elucidate specimen thickness effects and their implications on surface measurements that are taken during experimental studies.
Distribution: Approved for public release
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Last Update / Reviewed: December 1, 2012