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Comparison of 2D and 3D carbon/carbon composites with respect to damage and fracture resistance |
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| Authors: | Mohamed S Aly-Hassan Hiroshi Hatta Mitsuhiro Watanabe |
| Affiliation: | a Department of Mechanical Engineering, Graduate School of Engineering, Tokyo Metropolitan University, 1-1 Minami-Ohsawa, Hachioji-shi, Tokyo 192-0397, Japan b Division of Space Propulsion, Institute of Space and Astronautical Science (ISAS), 3-1-1 Yoshinadai, Sagamihara-shi, Kanagawa-ken 229-8510, Japan c Department of Chemical Engineering, Kogakuin University, 2665-1 Nakano-chou, Hachioji-shi, Tokyo 192-0015, Japan d IHI Aerospace Co. Ltd., 900 Fujiki, Tomioka, Gunma 370-2398, Japan |
| Abstract: | 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. |
| Keywords: | A. Carbon/carbon composites B. Cracking D. Fracture, Mechanical properties, Interfacial properties |
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