製品衝撃強さ試験における問題点の実験的確認(機械力学,計測,自動制御)

概要

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In the previous study of shock response analysis for linear and nonlinear models representing products, we found the possibility of two kinds of strange phenomena. These phenomena lead to overestimation in the mechanical-shock fragility test. In order to verify these problems as stated above (in the mechanical-shock fragility tests, ex. JIS Z 0119 and ASTM D 3332), we conducted the shock experiments with a real product and an experimental model (which represent the situation that products are stacked). As a result of that, we confirmed that there is a possibility that these phenomena may occur in mechanical-shock fragility tests. The outline of these phenomena is as follows: (1) the critical acceleration of products may depend upon the velocity change of the shock pulse in the critical acceleration test. (The dependency of the critical acceleration on velocity change) (2) there is a possibility that the products may be more fragile reversely when a certain shock pulse with a lower acceleration is applied. (The reverse phenomenon in the critical acceleration shock test)
社団法人日本機械学会の論文
2002-02-25