GFRP中の微小破壊のダイナミックスに及ぼすガラス繊維/マトリックス界面性状の影響 : 第1報, UD-GFRPのAE原波形解析法と音響特性(<小特集>材料・構造の衝撃問題)

概要

論文の詳細を見る
With the aim of studing the effect of glass fiber/matrix interface quality on the dynamics of microfractures in GFRP, we propose a new source characterization of dissipative elastic waves. We measured the out-of-plane displacement by the longitudinal wave (P-wave) by using a developed AE monitoring system, and computed it by the convolution integral of assumed fracture dynamics with the analytical transfer function of the medium (Green's function of the second kind), taking into account both the orientation dependence of velocity and attenuation of the P-wave. We also propose a new computer algorithm for estimatig the source location and fracture mode by using the arrival time and radiation pattern of the P-wave, respectively. The first report introduces the proposed AE source characterization algorithm and acoustic properties of a unidirectional GFRP. Macroscopic elastic properties of UD-GFRPs prepared by adding paraffin wax to the matrix are also reported.
1997-12-25