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FAILURE STRENGTH OF FABRIC COMPOSITES WITH DRILLED AND MOULDED-IN HOLES | ||
| Al-Qadisiyah Journal for Engineering Sciences | ||
| Article 1, Volume 4, Issue 2, 2011, Pages 1-8 PDF (0 K) | ||
| Author | ||
| Ehsan Sabah M. Al-Ameen | ||
| Abstract | ||
| The effect of drilled and moulded-in circular holes of woven fabric composites on failure strength have been examined in flexural test. Three types of woven fabric-reinforced composite systems were used: glass fiber (E glass), Kevlar fiber, and glass- Kevlar hybrid in polyester matrix. All these types are of (30%) volume fraction, and hole diameter of (1, 2, 3, 4 and 5 mm) for each type. ISO standard flexural specimens were tested and repeated three times. It is noticed that the specimens with moulded-in holes exhibit failure strengths higher than those of drilled specimens by (7- 24%). Also the values of stress concentration factors (Kt) increase with increasing the hole size for all types of laminates, and they were arranged in an ascending order as follows: Kevlar/ polyester, glass-kevlar hybrid/ polyester, and glass/ polyester. | ||
| Keywords | ||
| strength; composite; failure; moulded; in hole; drilled holes | ||
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