| Summary: | Metallic interfaces in mechanical structures cause dynamic damping property. It is very effective to apply this good damping property to engine power plant in order to reduce noise and vibration, however, it is difficult to use dynamic damping property effectively because the mechanism of the damping behavior is not clarified completely. Accordingly, the experimental measuring device was made for the purpose of estimating dynamic damping characteristics of metallic interfaces quantitatively. Applying controlled vertical load to contact surface between metallic specimens, after that, exerting shearing reciprocal force to the interface by linear motion drive mechanism, relative displacement and applied shearing force are measured simultaneously. The dynamic characteristics of contact interfaces are identified as a result of describing hysteresis loops from measuring data. The measuring device was shown to measure damping property precisely in wide frequency range.
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