Interfacial shear stress distribution in model composites: the effect of fibre modulus |
| |
| Affiliation: | 1. Beijing Key Laboratory of Nonlinear Vibrations and Strength of Mechanical Structures, College of Mechanical Engineering, Beijing University of Technology, Beijing 100124, China;2. Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA;3. Xinjiang Goldwind Science & Technology Co., Ltd., Urumqi 830000, China;1. Institute of Geomechanics, Chinese Academy of Geological Sciences, Beijing 100081, PR China;2. China Geological Survey, M.L.R, Beijing 100037, PR China;3. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, Sichuan, 610059, PR China |
| |
| Abstract: | The micromechanics of reinforcement have been investigated for a continuous intermediate-modulus (IM) carbon fibre embedded in an epoxy resin (MY-750). The embedded single-fibre (fragmentation) geometry was employed as the loading configuration. A laser Raman spectroscopic method was used to obtain the fibre strain distribution along the embedded fibre fragments, at various levels of applied strain. The interfacial shear stress distribution along the fibre was derived through a balance of forces analysis.A number of parameters, such as the maximum interfacial shear stress at each level of applied strain and the fibre debonded length, were evaluated. The maximum interfacial shear stress of the IM fibre system was found to increase by 80%, compared with the high-modulus fibre system examined previously, while the distance from the fibre end where the interfacial shear stress maximizes was significantly shorter. The debonded length was found to increase only marginally up to an applied strain of 1.8%, followed by a dramatic rate of increase between 1.8% and 2.5% of applied strain. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
