クリープ・疲労相互効果に基づく寿命推定法 : ガスタービン,ディーゼル機関部材の例

概要

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A program of creep-fatigue interaction tests was conducted in order to evaluate a criterion for failure taking into account the detrimental effect causing by the time dependent process. From the test data on commonly used high temperature materials for gas turbine and diesel engine in air, hydrogen gas and corrosive ash, we proposed the life estimation method under the combined creep-fatigue loadings. This method based on liner cummulative creep damage expressed by the equivalent hold time is stress dependent having nothing to do with loading patterns. We confirm from this method the correlation between experimental data or available data in literatures and estimation is quite good for a several type of loadings. Our experiments are unnecessary the complicate testing for obtaining the material constants but only require the conventional simple low cycle fatigue tests with the effects of hold time inserted at peak strain or stress and creep rupture tests.
一般社団法人日本機械学会の論文
1986-05-25