Comparison of 2D and 3D carbon/carbon composites with respect to damage and fracture resistance

The static mechanical responses of two- and three-dimensionally reinforced carbon/carbon composites (2D- and 3D-C/Cs) were compared. The mechanical properties examined included tensile and shear stress–strain (S–S) relations, and fracture behavior using compact tension and double edge notch configur...

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Veröffentlicht in:Carbon (New York) 2003, Vol.41 (5), p.1069-1078
Hauptverfasser: Aly-Hassan, Mohamed S, Hatta, Hiroshi, Wakayama, Shuichi, Watanabe, Mitsuhiro, Miyagawa, Kiyoshi
Format: Artikel
Sprache:eng
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Zusammenfassung:The static mechanical responses of two- and three-dimensionally reinforced carbon/carbon composites (2D- and 3D-C/Cs) were compared. The mechanical properties examined included tensile and shear stress–strain (S–S) relations, and fracture behavior using compact tension and double edge notch configurations. Compared with 2D-C/Cs, 3D-C/Cs were shown to possess a similar tensile S–S relation, lower shear strength, higher ultimate deformation in shear, and much higher fracture resistance. The differences in shear and fracture resistance were shown to be derived from a weaker fiber/matrix interface and weaker bonding between fiber bundles in the 3D-C/Cs. These weak interface characteristics of 3D-C/Cs are due to the high value of residual stresses caused by the three-dimensional fiber constraint of 3D-C/Cs.
ISSN:0008-6223
1873-3891
DOI:10.1016/S0008-6223(02)00442-6