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论文类型：期刊论文
发表时间：2013-09-01
发表刊物：OPTICS AND LASERS IN ENGINEERING
收录刊物：SCIE、EI、Scopus
卷号：51
期号：9
页面范围：1085-1091
ISSN号：0143-8166
关键字：Broken fiber; Fiber crack interaction; Interfacial stress transfer; Micro-Raman spectroscopy
摘要：Micromechanics of broken fiber/crack interaction were investigated by micro-Raman spectroscopy. The stress distribution on a broken fiber was measured point-by-point using micro-Raman spectroscopy. The interaction between the crack and broken fiber was discussed and a stress transfer model involving the broken fiber was established. A reverse sliding of the broken fiber within the debonded region was gradually transformed into a forward sliding during reloading and the debonded fiber was re-loaded at last. The extended stress model considers that the second forward sliding zone always exists at the broken fiber-end and keeps the same length, while each length of the first forward sliding zone and reverse sliding zone changes with the load. Experimental results of the extended stress model in this study can be used to explain the stress transfer in the case of ductile fiber fracture. (C) 2013 Elsevier Ltd. All rights reserved.