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| Titel: |
Modified Cruciform Test for Application to Graphite/Epoxy Composites |
| Auteur: |
Bechel, Vernon T. Tandon, G. P. |
| Verschenen in: |
Mechanics of advanced materials & structures |
| Paginering: | Jaargang 9 (2002) nr. 1 pagina's 1-17 |
| Jaar: |
2002-01-01 |
| Inhoud: |
The small size and low transverse modulus of commercial graphite fibers make it difficult to apply the cruciform test [1, 2] to measure interfacial normal strength of graphite/epoxy composites. The implications of cruciform testing composites with graphite fibers are presented through a parametric study of the effects of the fiber diameter, sample thickness, fiber transverse modulus, and fillet radius. Based on the parametric study, the cruciform sample configuration was modified to suppress failure at the fillets. The reflected-light method for detecting interfacial debonding [3] was combined with the new cruciform configuration and initially verified on a previously tested SiC/epoxy model composite. The utility of this modification was demonstrated next on another model composite in which interfacial failure could not be achieved with the original sample geometry. Finally, the cruciform test was applied to epoxy matrix composites with 7.5- μm-diameter graphite fibers with various fiber surface preparations embedded in both transparent and semitransparent matrices. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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