損傷力学に基づく繊維強化複合材料のAE評価手法

概要

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Since fiber reinforced composite materials have been applied to main part of structures, the evaluation for their safety and reliability is very important. Acoustic emission (AE) has been widely used as a monitor technique for the damage propagation in fiber reinforced composite materials. However, it is difficult to reveal the damage mechanism from the rsults of AE inspection, because the quantitative relation between the detected AE wave and the mode of damages has not been grasped. In this paper, AE simulation is proposed to help evaluate the damage mechanism by AE. The damage behavior is simulated by finite element analysis using anisotropic damage model based on damage mechanics, and the characteristics of AE are predicted by the analytical results. As an example, the damage behavior of center-notched laminates under uniaxial tensile load has been analyzed and the analytical results have been compared with experimental ones. It is recognized that their results have a good agreement, and that the proposed simulation method is very useful for the evaluation of damage mechanism.
社団法人日本機械学会の論文
1998-12-25