MISC

1987年

Fatigue Crack Growth Behavior of Aluminum Alloy under Repeated Two-Step Load Conditions: (The Case where Both Stress Levels KHand KLare in Region II of Crack Growth Rate Curve)

Zairyo/Journal of the Society of Materials Science, Japan
  • Tsuneshichi Tanaka
  • ,
  • Yasuo Katoh
  • ,
  • Hideaki Nakayama

36
411
開始ページ
1368
終了ページ
1374
記述言語
英語
掲載種別
DOI
10.2472/jsms.36.1368

Aluminum alloy (A 2017-T 3) compact tension specimens were tested under repeated two-step load conditions, and the crack growth rate and crack closure behavior were observed. The higher and lower stress levels, AH and KL, were selected in the region II of the crack growth rate curve of the material obtained by AK increasing tests. It was found that the crack growth rate da/dN and crack opening stress intensity Kopwere affected by the stress cycle ratio KL/NH
namely, da/dN was decreased and Kopwas raised by the increase of NL/NH. The estimation of the crack growth rate for lower stress level KLby the linear cummulative law shows that the estimated relation of (da/dN)Lversus (Keff)L was in better agreement with the fundamental crack growth rate curve when the crack closure only in the repetition of KL was taken into account, than when the closure at both stress levels of KHand KLwere considered. © 1987, The Society of Materials Science, Japan. All rights reserved.

リンク情報
DOI
https://doi.org/10.2472/jsms.36.1368
ID情報
  • DOI : 10.2472/jsms.36.1368
  • ISSN : 1880-7488
  • ISSN : 0514-5163
  • SCOPUS ID : 0023596661

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