Low Constraint Fracture Toughness Testing
By Fabian Orth on Tuesday, October 19th, 2010
Currently, there is not a standardized low-constraint test procedure that allows a more representative measurement of the material toughness. EWI will be conducting an internal research program to evaluate the latest technology to generate a resistance curve using low-constraint single-edge-cracked tension geometry. The specimen geometry and tension loading mode is designed to produce a level of crack-tip constraint that is similar to the constraint experienced in service for a surface circumferential flaw in a pipe subject to tension or bending loading. This program will allow EWI to refine our current procedures with the latest technology.