Transactions of Materials and Heat Treatment

Title：Modification calculation on fatigue comprehensive coefficient for C-type frame of huge hydraulic pressure machine

Authors： Huang Ning Yang Jianxiang Li Suyun

Unit： Hezhou University

KeyWords： C-type frame of huge hydraulic pressure machine fatigue life simulated scaled-model notched-sample size coefficient fatigue comprehensive factor modification

ClassificationCode：O346

year,vol(issue):pagenumber：2017,42(8):93-96

Abstract：

When the fatigue life of C-type frame of huge pressure machine is estimated by nominal stress method, the fatigue comprehensive coefficient is a critical parameter. Based on the principle of fatigue simulation test and principle of similarity, the simulated scaled-model was established. On this basis, simultaneously considering interactions between three factors (stress concentration, size, and surface processing), a fatigue comprehensive coefficient modified expression was presented. A notched-sample fatigue life was analyzed and calculated by new expression, and it was basically accord with the test value. Furthermore, comparing modification results of the two coefficients, the new modified expression is more effective. The fatigue comprehensive coefficient of C-type frame can be conveniently obtained by new modification formula, which provides important basis for its fatigue life assessment.

Funds：

贺州学院博士基金启动项目（HZUBS201303）；贺州市科技开发项目（贺科能1408013）；广西高校科研项目（KY2015ZD128）

黄宁（1974-），男，博士，讲师

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