Figure 8.3. Schematic diagrams showing (a) a typical load vs load-line displacement trace from a single specimen unloading compliance test, (b) the J vs crack extension plot (resulting from analysis of the load-displacement trace) used to determine the J-R curve, JIc, and the tearing modulus (based on the J-R curve slope dJ/da), and (c) the region of qualified data for the analysis (ASTM, 2005).
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