Probabilistic treatment of microstructural effects on fatigue crack growth of large cracks

被引：10
作者：
Chan, KS
Torng, TY
机构：
[1] Southwest Research Institute, San Antonio, TX, 78238
[2] Space Systems Division, Downey, CA
来源：
JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME | 1996年 / 118卷 / 03期
关键词：
D O I：
10.1115/1.2806824
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
A probabilistic model has been developed for treating the effects of microstructural variation on the fatigue crack growth response of large cracks in structural alloys. The proposed methodology is based on a microstructure-based fatigue crack growth law that relates the crack growth rate, da/dN, to the dislocation barrier spacing, yield stress, fatigue ductility coefficient, Youngs's modulus, and the dislocation cell size or crack jump distance. Probabilistic treatment of theses microstructure-dependent variables has led to a fatigue ductility coefficient, and the dislocation barrier spacing in the response equation. Applications of the probabilistic crack growth model to structural reliability analyses for steels and Ti-alloys are illustrated, and the probabilistic sensitivities of individual random variables are evaluated.
引用
收藏
页码：379 / 386
页数：8
相关论文
共 20 条
  • [11] Manson S.S., 1964, P 10 SAG ARM MAT RES, P133
  • [12] STOCHASTIC MODELING OF FATIGUE CRACK-GROWTH
    ORTIZ, K
    KIREMIDJIAN, AS
    [J]. ENGINEERING FRACTURE MECHANICS, 1988, 29 (03) : 317 - 334
  • [13] PETCH NJ, 1953, J IRON STEEL I, V174, P25
  • [14] A STATISTICAL-MODEL FOR THE PREDICTION OF FATIGUE CRACK-GROWTH UNDER A BLOCK TYPE SPECTRUM LOADING
    SALIVAR, GC
    YANG, JN
    SCHWARTZ, BJ
    [J]. ENGINEERING FRACTURE MECHANICS, 1988, 31 (03) : 371 - 380
  • [15] TODD JA, 1993, T ASME, V115, P131
  • [16] TORNG TY, 1994, ADV STRUCTURAL RELIA, P534
  • [17] WU YT, 1993, P 34 STRUCT STRUCT D, P2817
  • [18] WU YT, 1989, COMPUTATIONAL PROBAB, V93, P182
  • [19] YANG JN, 1985, AFWALTR853062
  • [20] 50-FOLD DIFFERENCE IN REGION-II FATIGUE CRACK-PROPAGATION RESISTANCE OF TITANIUM-ALLOYS - GRAIN-SIZE EFFECT
    YODER, GR
    COOLEY, LA
    CROOKER, TW
    [J]. JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY-TRANSACTIONS OF THE ASME, 1979, 101 (01): : 86 - 90
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