計装化衝撃試験方法の検討

概要

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The Instrumented Charpy test was conducted on U-, V-, and fine notched specimens and a fatigue precracked specimen of A508 C1.3 steel and the effect of specimen configuration, test temperature and loading speed on the dynamic fracture toughness was investigated. Comparing the load-displacement curves of the U-notched and fatigue cracked specimen, the fracture toughness at the onset of crack extension was determined and proved to coincide with the lowest value of the dynamic fracture toughness. The J-integral and R-curve of the fatigue cracked specimen were corrected for crack extension by a proposed direct calculation procedure in place of ASTM's step-by-step one.
一般社団法人日本機械学会の論文
1987-07-25