G030123 打撃に関する二次元モデルを用いた基礎的な研究([G03012]材料力学部門一般セッション(12):実験・検出手法)

概要

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In order to propose the fast nondestructive inspection, it is examined by experiments and numerical simulations how to detect wave radiating from a crack by using simple hold method. Simple hold method is necessary in order to check the mass of machine parts. In this study simple hold method is method for clamping the test piece by upper and lower clamps with acrylic plate. The acceleration sensor was fixed on the acrylic plate. Experiments and numerical simulations were performed to check if vibration of the crack is detected under the condition that test piece is held by simple hold method. Real crack in the machine parts was treated as two-dimensional crack model. Vibration of the crack was detected by acceleration sensor near the clamp area. And, the strain gauges were pasted near the crack, in order to detect vibration of crack. Numerical simulations were carried out by finite element method. The results of impact test were compared with the results of numerical simulation in the case of natural frequency and strain. Vibration of the crack was detected under the condition that a part of crack dose not exists in the clamp area. But, under the condition that a part of crack exists in the clamp area, vibration can not be detected.
一般社団法人日本機械学会の論文
2011-09-11