破壊力学 せん断(ModeII)疲労き裂伝ぱ抵抗値ΔKτthの測定方法とその応用

村上 敬宜, 濱田 繁, 杉野 和男, 高尾 健一

研究成果: Contribution to journalArticle査読

抄録

In order to measure the Mode II fatigue crack growth resistance of SS41 steel and a rail steel, a particular double-cantilever type specimen with side grooves was designed. Mode II fatigue crack growth tests by using the newly designed specimens were conducted by a conventional closed-loop type tension-compression fatigue testing machine under a constant load amplitude which corresponds to Δ<i>K</i><sub>II</sub>-decreasing test with increase in crack length. The crack length was measured by the AC potential method. Mode II crack growth rate gradually decreased as the crack grew. The typical fracture surface of Mode II fatigue crack growth which was quite different from Mode I fatigue fracture surface was observed. But the trace of local branching of crack growth mode from Mode II to I was observed on the overall fracture surface of Mode II. The relationship between Mode II crack growth rate (<i>da</i>/<i>dN</i>) and Δ<i>K</i><sub>II</sub> was obtained.
寄稿の翻訳タイトルSpecial Issue on Fracture Mechanics. New Measurement Method of Mode II Threshold Stress Intensity Factor Range .DELTA.K.TAU.th and Its Application.
本文言語日本語
ページ(範囲)1264-1270
ページ数7
ジャーナルZairyo/Journal of the Society of Materials Science, Japan
43
493
DOI
出版ステータス出版済み - 1994

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