Journal Published Online: 01 July 1995
Volume 17, Issue 3

Effects of Stacking Sequences on Mechanically Fastened Joint Strength in Quasi-Isotropic Carbon-Epoxy Laminates

CODEN: JCTRER

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.

Author Information

Hamada, H
Kyoto Institute of Technology, Kyoto, Japan
Haruna, K
Kyoto Institute of Technology, Kyoto, Japan
Maekawa, Z
Kyoto Institute of Technology, Kyoto, Japan
Pages: 11
Price: $25.00
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Stock #: CTR10490J
ISSN: 0884-6804
DOI: 10.1520/CTR10490J