Effect of Stitch Density on Fatigue Behavior of Vectran- Stitched Composites

Abstract

Effect of stitch density on the tension-tension fatigue behavior of Vectran- stitched composite is investigated. T800SC/epoxy composites are stitched using Vectran thread with moderate density (stitch density = 2.8 cm-2) and high density (stitch density = 11.1 cm-2) stitches. Fatigue life, stiffness degradation and fatigue damage growth in carbon/epoxy are evaluated in the presence of areal stitches. It is found that the endurance limit (measured by no fatigue failure at 106 cycles) of stitched composites is better than that of unstitched composites when the applied maximum stress is 60% of the respective ultimate strength. Better endurance limit corresponds to the ability of stitch threads in arresting the growth of delamination. In the stiffness degradation evaluation, the rapid loss of dynamic stiffness is related to the initiation of delamination at the specimen edges.

Department(s)

Mechanical and Aerospace Engineering

International Standard Book Number (ISBN)

978-162276438-9

Document Type

Article - Conference proceedings

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2025 DEStech Publications Inc., All rights reserved.

Publication Date

01 Dec 2012

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