複合荷重を受ける揚重機用リンクチェーンの有限要素解析を用いた疲労強度推定法

概要

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Link chains used in chain hoists are subjected to combined loads of torsion, tension, impact and bending moments. In this paper, fatigue tests for link chains concerning combined loads are performed. Moreover, a procedure for predicting S-N curves is proposed using the three-dimensional elastoplastic finite-element analysis and Coffin-Manson's law. Fatigue tests were conducted for link chains in order to examine fatigue strength of l0^6 cycles. From the results of the fatigue tests, it is found that crack initiates from the border between the straight part and the curved part of the inner surface of link chains. It is found that the procedure suggested in this paper is quite suitable for the prediction of S-N curves. As a result, fundamental method of predicting fatigue strength of link chain is obtained.
一般社団法人日本機械学会の論文
1996-07-25