三次元弾塑性有限要素解析を用いた揚重機用リンクチェーンの疲労強度推定

概要

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Link chains used in chain hoists are often subjected to combined loads of torsion, tension, dynamic and bending moments. They are usually fractured by fatigue. A few investigations have been carried out on the behavior of fatigue for link chains. In this paper, a procedure for a prediction S-N curves is examined using three dimensional elastic-plastic finite-element analysis and Coffin-Man-son's law. Fatigue tests were conducted for link chains in order to examine fatigue strength of 10^6 cycles. It is found that the procedure suggested in this paper is quite stuitable for the prediction of S-N curves. From the fatigue tests and the finiteelement analysis, it is found that a crack initiates from the border between the straight part and the curved part of the inner surface of a link chain. Comparison between the numerical and the experimental results is made for the strain measurement and stress distribution. The numerical results corresponds with the experimental results fairly well.
一般社団法人日本機械学会の論文
1995-10-25