In this paper, a quantitative prediction method for the fatigue limit reliability of metal with different sorts of inhomogenities is proposed. The method is based on the stress-strength model which consists of "statistical characteristics of hardness in a small region" and "statistical characteristics of a mechanical condition in the small region containing the defect under a cyclic stress". The method was applied to the aluminum cast alloy JIS AC 4 B-T 6, which has eutectic Si, Fe compound and porosity in the material as inhomogenities. The fatigue strength at 107 stress cycles was defined as the fatigue limit. Rotating bending fatigue tests of plain specimens were also caried out. The validity of the present method was confirmed by comparing analyzed results with experimental results.
|ジャーナル||Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A|
|出版ステータス||出版済み - 12 2005|
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