Mode I interlaminar fracture mechanics of unidirectionally reinforced carbon/nylon laminates.

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  • 一方向カーボン／ナイロン積層板のモードＩ層間破壊特性
  • 1ホウコウ カーボン ナイロン セキソウバン ノ モード I ソウカン ハカイ

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Abstract

Mode I interlaminar fracture toughness of CFRP is evaluated using DCB (Double Cantilever Beam) specimens. Unidirectionally reinforced carbon/nylon laminates were used for the test. The fracture toughness value, Gc, was obtained by the area method, compliance method and nonlinear analysis. The Gc of 2 mm-thick specimen is 10-12 times larger than that of an epoxy specimen. However, in case of an 8 mm-thick specimen, voids and fiber-bridging are observed, and the fracture mechanism is complicated. Acoustic emission (AE) was also measured during the compliance test. It is shown that the viscoelastic and plastic effects should be considered in studing the fracture mechanism.

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