Damage and failure mechanisms of a3-directional carbon/carbon composite under uniaxial tensile and shear loads

✍ Scribed by O. Siron; J. Lamon

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 845 KB
• Volume: 46
• Category: Article
• ISSN: 1359-6454
• DOI: 10.1016/s1359-6454(98)00269-9

✦ Synopsis

AbstractÐThe mechanical behavior of a three-directional carbon/carbon (C/C) composite under tensile and shear loads is investigated in relation with the failure mechanisms and, the ®ber architecture. This three-directional C/C composite was produced by Chemical Vapor In®ltration of a needled ®ber preform of multiple layers of satin woven tows. The C/C composite exhibited several interesting features including an essentially non-linear stress±strain behavior and permanent deformations. Three families of matrix cracks were identi®ed under tensile and shear loads, including microcracks in the tows, intertow delamination and cracks across the longitudinal tows. It was found that the delamination cracks aect preponderantly the stress±strain behavior and the mechanical properties. Similar features in the mechanical behavior and the failure mechanisms were highlighted under tension and under shear loading.