衝撃を受けるCFRPの粘弾性特性に及ぼす繊維配向角の影響

概要

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The effect of fiber orientation on viscoelastic properties of CFRP (corbon fiber reinforced plastic) was examined by means of a wave propagation testing. Specimens used in the present study were CFRO hollow cylinders, which were made in various fiber orientation angles (winding angles) by filament-winding technique. Longitudinal impact tests were performed an strain wave histories wee resolved int oFourier components in order to determine the complex compliance. The expeirmental results revealed that both the dynamic compliance (real part of complex compliance) and the loss compliance (imaginary part of complex compliance9 remarkably increase with fiber orientaton angle at about 45°and show the maximum values at about 70°. Furthermore, based on the correspondence principle between elasticity and viscoelasticity, the laminate theory for elastic constants was modified to treat viscoelastic properties and the effect of fiber orientation angle on the complex compliance was theoretically discussed. It was found that the modified theory provides reasonable estimations on the change of viscoelastic properties with fiber orientation angle.
社団法人日本材料学会の論文
1993-05-15