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ISO 12135:2002 Metallic materials - Unified method of test for the determination of quasistatic fracture toughness
standard by International Organization for Standardization, 12/01/2002
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International Standard ISO 12135 specifies methods for determining fracture toughness in terms of K, , J and R-curves for homogeneous metallic materials subjected to quasistatic loading. Specimens are notched, precracked by fatigue and tested under slowly increasing displacement.