Journal
JOURNAL OF TESTING AND EVALUATION
Volume 44, Issue 3, Pages 1261-1270Publisher
AMER SOC TESTING MATERIALS
DOI: 10.1520/JTE20140295
Keywords
strain energy density (SED); key-hole notch; Brazilian disk; brittle fracture; mode II loading
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Brittle fracture of key-hole notches under pure mode II loading is investigated both experimentally and theoretically. In the experimental part, a new version of the well-known Brazilian disk specimen containing a central dumbbell-shaped slit with two key-ends, called the Key-BD specimen, made of polymethyl-methacrylate (PMMA), is utilized to perform fracture experiments at room temperature for different notch lengths and various notch radii. In the theoretical part, the experimentally recorded fracture loads are predicted by means of the strain energy density (SED) averaged over a specified control volume, which embraces the notch edge. It is found that the SED criterion can successfully predict the test results.
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