Determination of fiber bridging stress profile by debond length measurement

✍ Scribed by Yongjian Sun; Raj N. Singh

• Book ID: 104402310
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 574 KB
• Volume: 48
• Category: Article
• ISSN: 1359-6454
• DOI: 10.1016/s1359-6454(00)00137-3

✦ Synopsis

AbstractÐA new technique is developed for measuring the ®ber bridging stress in ®ber-reinforced ceramic matrix composites (FCMCs). This technique is based on the direct measurement of the debond length associated with a bridged matrix crack in a composite. Theoretical formulations are developed to relate the debond length measurement (DLM) to the applied stress and ®ber bridging stress. Subsequently, the DLMs of a bridged crack are used to calculate the bridging stress pro®le. Simultaneously, the crack opening displacements (CODs) are also measured from which the ®ber bridging stress is determined independently. A comparison of the ®ber bridging stress obtained from DLM and COD is made. Finally, a new bridging law is proposed and veri®ed based on this study.