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Processing and property of carbon-fiber aluminum-foam sandwich with aramid-fiber composite adhesive joints |
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| Authors: | Zhi Sun J. Jeyaraman Shanshan Shi Shiyong Sun Xiaozhi Hu Haoran Chen |
| Affiliation: | 1. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, P.R. China;2. School of Mechanical and Chemical Engineering, University of Western Australia, Perth, WA 6009, Australiazhisun@mail.dlut.edu.cn;4. School of Mechanical and Chemical Engineering, University of Western Australia, Perth, WA 6009, Australia;5. School of Mechanical and Chemical Engineering, University of Western Australia, Perth, WA 6009, Australia |
| Abstract: | Thin tissues (or called webs) of short aramid fibers were added at the adhesive joints between carbon-fiber face sheets and aluminum-foam core to form aramid-fiber ‘composite adhesive joints’ for improving the interfacial bonding strength of sandwich structures and therefore other structural properties. In-plane critical compression loads and failure modes of carbon-fiber aluminum-foam sandwich beams with short aramid-fiber composite adhesive joints are investigated and discussed in this study. Improvements in critical compression loads were achieved for all specimens with aramid-fiber composite adhesive joints of different densities. It is suggested that the composite adhesive joints using low-density short aramid fibers is effective in promoting reinforcements against cracking and delamination at the interface between carbon-fiber face sheets and aluminum-foam core. The underlying interfacial strengthening and toughening mechanisms were discussed and analyzed based on observations from optical image and scanning electron microscopy. |
| Keywords: | aramid fiber interface mechanical testing fractography composite adhesive joints |