The Relationship Between the Bending Fatigue Strength of Laminated Inhomogeneous Plates and the Fatigue Crack Growth Law
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概要
- 論文の詳細を見る
An expression for the evaluation of fatigue life is proposed on the basis of the fatigue crack growth low, confirming the fact that tensile mean stress and tensile residual stress do not influence the fatigue crack initiation life but accelerate fatigue crack growth. By using this expression, bending S-N curves for base metals and laminated inhomogeneous plates (clad plates) are discussed. As a result, for the surface microcracks of base metal subjected to bending fatigue, the constant m of the fatigue crack growth law in which the growth rate is proportional to the mth power of stress level has been evaluated. The ratios of crack initiation to fatigue lives have also been estimated. In addition, especially in the laminated inhomogeneous plates, tensile mean stress has remarkably decreased fatigue lives, because fatigue crack growth constitutes a significant portion of fatigue lifetime.
- 一般社団法人日本機械学会の論文
著者
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Honda Kazuo
Faculty Of Engineering Okayama University
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Honda Kazuo
Faculty Of Engineering Kyoto University
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Torii Tashiyuki
Faculty Of Engineering Okayama University
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