圧電材料の切欠き強度試験と破壊のクライテリオンに関する研究(OS2-2 圧電材料システム,OS2 先端材料システム設計とメゾメカニックス)

概要

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A few experimental efforts have been made to observe fracture behavior of piezoelectric material under electro-mechanical loadings. However, the fracture behavior of piezoelectric material is still ambiguous, specially it is not clear whether the electric field impedes or enhances crack propagation. In this paper, the theree-point bending fracture tests were performed on C-2 piezoelectric ceramics, and we found that crack extention could be aided or halted by an electric field depending on the field direction. Crack Energy Density theory for piezoelectric material as a possible fracture criterion is presented, and applicability of the criterion is discussed.
社団法人日本機械学会の論文
2004-07-20