セラミックス製ラジアルタービンロータの強度解析

概要

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An experimental method for finding the A and N values of fatigue in ceramic radial turbine rotors is considered in this paper. In brittle materials like ceramics, slow crack growth behavior can be expressed by υ=A・K_I^N, where υ is crack velocity, A and N are constant, and K_I is stress intensity factor. These A and N values must be found in order to predict fatigue life. Rotating fatigue tests were, therefore, performed under constant stress using radial turbine rotors made of silicon nitride, and the A, N values were determined from the relation between fatigue life and survival probability. Considerable differences were found to exist between the A, N values obtained by these radial turbine tests and those obtained by tests using test pieces.
一般社団法人日本機械学会の論文
1986-09-25