結晶均質化法に基づく圧電弾性有限要素解析手法の開発

概要

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The most of piezoelectric ceramics have perovskite crystal structure, which can be characterized as a non-symmetry crystal lattice structure in a microscopic scale and a strong anisotropy in a macroscopic scale. Therefore, the macroscopic mechanical and functional properties of poly-crystalline ceramics are strongly affected by the microscopic non-homogeneous crystal structure. In this work, multi-scale finite element modeling procedure based on crystallographic homogenization method has been developed to estimate macroscopic properties considering distributions of crystal orientations. At first, the size and number effects of finite element in microscopic model on the macroscopic properties have been investigated. Next, the macroscopic dielectric, piezoelectric and elastic constants have been predicted by employing arbitrary microscopic crystal orientation distributions. Finally, the availability of our finite element procedure has been confirmed through comparison with result of the conventional self-consistent model.
一般社団法人日本機械学会の論文
2003-03-25