Fatigue Mechanism, Quantitative Analysis of Cyclic Effect and Fretting Wear Model in Sintered Silicon Nitride.

DOI Web Site Web Site 2 Citations

Bibliographic Information

Other Title
  • 常圧焼結窒化ケイ素の疲労機構，繰返し効果の定量化とフレッティング摩耗モデル
  • ジョウアツ ショウケツ チッカ ケイソ ノ ヒロウ キコウ クリカエシ コウカ

Search this article

Abstract

A cyclic fatigue mechanism based upon cyclic degradation of the bridging effect due to cyclic load has been verified through extensive experimental results obtained by the authors. A fretting wear model for cyclic fatigue has been developed and compared with the experimental results. As the results, the model was proven to be excellent. Cyclic degradation of the bridging effect ΔKs is found to be as follows: ΔKs=1.54{(1-R)-0.08}log[10-4/(da/dt)eq]. R is stress ratio and (da/dt)eq is equivalent crack propagation rate. This means that ΔKs is proportional to the amplitude of cyclic load and to log N, where N is the number of stress cycles. This cyclic fatigue mechanism can successfully explain the main cyclic fatigue behaviour. Cycle-dependent crack propagation at low KImax results because the wear process is the rate controling process at bridging sites.

Journal

Citations (2)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top