ランプ入力による衝撃ENF試験の有限要素シミュレーション : 提案したエネルギー解放率評価法の有効性の検証

概要

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The behavior of an end notched flexure specimen subjected to impact loading was investigated by transient finite element analyses. The aim of this study is to confirm the validity of the estimation method for mode II interlaminar fracture toughness of composite materials under a high loading rate. which was proposed by the authors. Finite element results showed that flexural vibration of the specimen could be effectively suppressed when gentle gradient ramped incident stress waves were applied. while marked vibration tended to be excited when sharp-gradient step incident stress waves were applied. In the former case, a simple formula based on the static compliance method can be applied to estimate dynamic energy release rate as the authors suggested previously. Furthermore, the estimation error in the proposed method can be reduced by evaluating energy release rate from the surface strain of the specimen.
社団法人日本機械学会の論文
1997-01-25