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疲劳断裂的微观机理和非平衡统计特性(Ⅱ)
NONEQUINIBRIUM STATISTICAL THEORY OF FATIGUE FRACTURE (Ⅱ) FROM MICROSCOPIC MECHANISM TO MACROSCOPIC PROPERTIES OF FATIGUE FRACTURE
【摘要】 本文给出了微裂纹的随机演化方程,结合位错机理解得了微裂纹密度的分布函数,求出了疲劳断裂几率和可靠性,进而导出了σ_a——N曲线、疲劳寿命的统计分布和统计平均值。
【Abstract】 The stochasfic evolufion equation of microcracks is qiven.The density distribution function of microcracks is obtained on the basis of dislocation mechanism. The fatigue fracture probability, reliability, σa-N Curves, average fatigue life and its statistical deviation are derived.
【关键词】 位错机理;
微裂纹演化方程;
疲劳断裂机理;
σ2-N曲线;
【Key words】 dislocation mechanism; microcrack evolution equation; fatigue fracture Probability; σa?N Curve;
【Key words】 dislocation mechanism; microcrack evolution equation; fatigue fracture Probability; σa?N Curve;
- 【文献出处】 北京工业学院学报 ,Journal of Beijing Institute of Technology , 编辑部邮箱 ,1986年02期
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