| method to determine fracture toughness in which compliance of the test specimen is measured by unloading repeatedly to determine the crack propagation length under loading
Note 1 to entry: Fracture toughness is determined by using a relation between the released energy or stress intensity factor and the crack propagation length. Note 2 to entry: This entry was numbered 815-17-08 in IEC 60050-815:2015.
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