1355 多連式軸荷重疲労試験機の開発と基本性能の検証(S22-3 非鉄合金・試験装置,S22 ギガサイクル疲労)

概要

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Fatigue behavior of metallic materials in very high cycle regime has been coming out as an important subject to guarantee the safety of mechanical structures during the long term service, hi order to perform fatigue tests in very high cycle regime of N=10^9, a long period such as 230days is required at the testing frequency of 50Hz. Multi-type fatigue testing machine which can give cyclic loadings to a number of specimens simultaneously is valuable to obtain fatigue test data within a definite period. From this point of view, a multi-type fatigue testing machine in axial loading was developed by using a special hydraulic system with a rotary valve to distribute high pressure oil into the respective actuators. By means of this testing machine, fatigue tests for four different specimens can be performed simultaneously at the frequency of 80Hz. The loading capacity for each specimen is ±10kN and the applied load can be given independently to the individual specimen. Thus, one can perform the fatigue tests in the long life regime for many apecimens within a definite period even in the usual frequency where the temperature raising does not take place on the specimens. The fundamental structure and its performance are presented here together with the fundamental experimental results on a bearing steel of SUJ2.
社団法人日本機械学会の論文
2005-09-18