多軸応力下での疲労き裂成長速度におよぼす応力成分相互作用効果

• 横堀 寿光

  東北大学工学部

• 磯貝 毅

  帝京大学理工学部

• 横堀 武夫

  帝京大学理工学部

• 小泉 幸久

  (株)日立製作所

書誌事項

タイトル別名

• Effect of stress components on fatigue crack growth rate under multiaxial stress condition.
• タジク オウリョクカ デ ノ ヒロウ キレツ セイチョウ ソクド ニ オヨボス

抄録

Multiaxial fatigue tests were carried out to investigate the effect of stress components (Δσ, Δτ, σ_st., τ_st.) on fatigue crack growth.<br>The test method was the combined tension and tortion one in phase loading by using thin-walled hollow cylindrical specimens with pre-cracks. The experiments were carried out under the condition of equal equivalent stress amplitude, Δσ_eq=√Δσ²+3Δτ²<br>Under the condition of mixed modes, the fatigue crack growth rate increases remarkably with increasing stress ratio. This characteristics is due to the effect of static tensile stress σ_st. on Δτ.<br>In this paper, the effect of static tensile stress was incorporated in the constitutive equation of fatigue crack growth rate under the mixed mode fatigue condition of Δσ and Δτ. Then, the following constitutive equation of fatigue crack growth rate including the effects of Δσ, Δτ, σ_st. and τ_st. was obtained.<br>db/dN=A(ΔK_Ib)^mA=(A_R=0)^{1/r^*}<br>r^*={1+(σ_st/Δτ)^1/2/7 (Region IIa) 1 (Region IIb)<br>A_R=0={2.16×10^-5×0.230^m (Region IIa) 3.64×10^-5×0.147^m (Region IIb)<br>m={f(σ₂/σ₁) (Region IIa) g(σ₂/σ₁) (Region IIb)

収録刊行物

• 材料

  材料 39 (443), 1106-1112, 1990

  公益社団法人 日本材料学会

キーワード

• Multiaxial fatigue crack growth rate
• Effect of stress ratio
• Effect of static tensile stress
• Effect of static torsional stress
• Effect of stress component

詳細情報

• CRID: 1390282680369352448
• NII論文ID: 110002297721
• NII書誌ID: AN00096175
• DOI: 10.2472/jsms.39.1106
• ISSN: 18807488
• ISSN: 05145163
• HANDLE: 10097/52774
• NDL書誌ID: 3674497
• Web Site: https://tohoku.repo.nii.ac.jp/records/26684
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3674497
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可