Nondestructive Evaluation and Mechanical Characterization of a Defect-Embedded Ceramic Matrix Composite Laminate

Authors: Mei, Hui; Xu, Yongdong; Cheng, Laifei; Zhang, Litong

Source: International Journal of Applied Ceramic Technology, Volume 4, Number 4, August 2007 , pp. 378-386(9)

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Abstract:

A C/SiC composite panel with defects of known size and of familiar nature was manufactured successfully for nondestructive evaluation. A computed tomography (CT) system was used to detect embedded defects. The results show that CT imaging corresponds well with the designed defects. The defect-embedded composites undergo relatively greater loss in tensile strength and failure strain than the as-received samples, although their initial Young's moduli are almost identical. It is also observed that the embedded defects make a significant contribution toward the initiation and accumulation of the damage in the composites, which result eventually in the early failure of the composite.

Document Type: Research article

DOI: http://dx.doi.org/10.1111/j.1744-7402.2007.02153.x

Affiliations: 1: National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an Shaanxi 710072, China

Publication date: 2007-08-01