Comparative assessment of stress transfer efficiency in tension and compression |
| |
| Affiliation: | 1. Institute of Chemical Engineering and High Temperature Chemical Processes, Foundation of Research and Technology-Hellas, P.O. Box 1414, Patras 265 00, Greece;2. Department of Materials, Queen Mary University of London, Mile End Road, London E1 4NS, UK;3. Dutch Polymer Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands;1. USEPA Region 9, WTR2, 75 Hawthorne St., San Francisco, CA 94105, United States;2. USEPA Office of Research & Development, NERL, Systems Exposure Division, Las Vegas, NV, United States;3. USEPA Office of Research & Development, NERL, Exposure Methods and Measurements Division, Las Vegas, NV 89119, United States;4. Chippewas of Georgina Island, Environmental Department, R.R.#2 Box N-13 Sutton West, Ontario Canada L0E 1R0;1. Section 2.6 Seismic Hazard and Stress Field, GFZ - German Research Centre for Geosciences, Telegrafenberg, Potsdam 14473, Germany;2. Golder Associates Hungary, H?vösvölgyi út 54, Budapest 1021, Hungary;3. Section 6.2 Geothermal Energy Systems, GFZ - German Research Centre for Geosciences, Telegrafenberg, Potsdam 14473, Germany;1. Institute of Strength Physics and Materials Science SB RAS, 2/4 Akademichesky Ave., Tomsk 634021, Russia;2. National Research Tomsk Polytechnic University, 30 Lenin Ave, Tomsk 634050, Russia;1. College of Transportation Science & Engineering, Nanjing Tech University, No. 200, Zhongshan North Rd., Nanjing 210009, China;2. Department of Environmental Engineering Science, Gunma University, 1-5-1 Tenjincho, Kiryu 376-8515, Japan;3. Earthquake Administration of Jiangsu Province, No. 3, Weigang Rd, Nanjing 210014, China |
| |
| Abstract: | Raman spectroscopy is used to get an insight into the microstructural aspects of the compressional behaviour of carbon fibre composites. This is done by a comparative assessment of the stress transfer efficiency in tension and compression in single-fibre discontinuous model geometries. It was found that the axial stress is transferred in the fibre through the generation of shear stresses at the interface. The mechanism of stress transfer is independent of the loading mode. Furthermore, the values of maximum interfacial shear stress are a function of the applied strain for both tension and compression loading. Significant differences were found, however, in the mode of failure of the two systems. In tension, interfacial failure initiates from the fibre ends at relatively high applied strains and the stress transfer efficiency is affected by the onset of matrix plasticity. On the other hand, in compression, deterioration of the stress transfer efficiency occurs prior to any noticeable interfacial failure at the fibre ends due to fibre collapse at low strains. Finally, it is worth noting that in compression, the fibre fragments remain in contact, and thus can still bear load. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
