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Study on the Effects of Surface Treatment and Stitching on the Fracture Behavior of Composite Laminates

계면처리와 스타칭이 복합적층판의 파괴거동에 미치는 영향 연구

Hong, S.Y;Hwang, W;Park, H.C;Han, K.S
홍순영;황운봉;박현철;한경섭

  • Published : 1996.03.01

Abstract

The interlaminar fracture behavior of woven laminates under static and cyclic loadings has been studied using DCB(double cantilever beam) specimens. The effects of surface treatment and stiching on the fracture behavior of composite laminates are investigated experimentally. Fracture toughness has been improved by surface treatment because the surface treatment can change the fracture mechanism of laminates. SCB(stitched cantilever beam) model has been proposed to quantify the effect of through-thickness resinforcement(stiching) in improving the delamination crack growth resistance. Distributed loads which are transfered to through-thickness fibers can be calculated by the SCB model. And fracture energy increase due to the distributed load can be predicted by a power function of the distributed load. A new parameter agreed well proposed predict fatigue crack growth rate. The predictions using this parameter agreed well with the experimental data.

Keywords

Surface Treatment;Stitching;SCB Model;Interliminar Fracture Toughness;Fatigue Carck Growth Rate