ISSN: 0884-6804
Page Count: 11

Effects of Stacking Sequences on Mechanically Fastened Joint Strength in Quasi-Isotropic Carbon-Epoxy Laminates
Hamada, H
Kyoto Institute of Technology,

Haruna, K
Kyoto Institute of Technology,

Maekawa, Z
Kyoto Institute of Technology,

Abstract

The desire to develop adequate strength, particularly at bolt hole, tends to restrict the choice of fiber patterns to those that do not deviate very far from a quasi-isotropic pattern. The weakest parts of a composite structure are the joint parts; therefore, the effective stacking sequences on joint strength while maintaining the isotropic nature have to be cleared. In this study, the effect of stacking sequences on quasi-isotropic T300/2500 joint strength was examined. Two joint geometries that exhibited bearing failure and net-tension failure under pin-bearing loads were chosen. Six types of laminate configurations were examined in quasi-isotropic patterns.

According to observation failure mode and acoustic emission (AE) measurement, the evidence of the effect of stacking sequences was made clear. The highest bearing and net-tension strength obtained from the quasi-isotropic laminates tested all had 0° plies on the outer surfaces, 90° plies next to the 0° plies, and ±45° plies interspersed in the middle of the laminate [0°²/90°²(+45°/-45°)²]s.

Keywords:
carbon fiber-reinforced plastics, bolted joints, quasi-isotropic pattern, stacking sequence

Paper ID: CTR10490J
DOI: 10.1520/CTR10490J
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