高温エンプラ製機器の疲労・クリープ相互作用下における負荷波形の影響

概要

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In this study, the influence of asymmetric triangular wave on fatigue life at eleveted temperature environment have been studied for PA66 resin materials. Especially the fracture mechanism has been analyzed for reliability. The main results are as follows; (1) There is the effect by the load waveform in the fatigue life of this materials. In the low stress side, fatigue lifes of the Fast-Slow wave are about 10 times in comparison with the Slow-Fast wave. (2) The fracture mechanism can be divided into three groups. In the high stress side, the fatigue factor control the fatigue life, and the waveform effect is little. In the low stress side, the creep factor control it. It is variable even in the inside waveform on the effect of creep. (3) There is the effect of the viscoelasticity by the load waveform.
一般社団法人日本機械学会の論文
2002-02-25