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Indexed by:期刊论文

Date of Publication:2014-09-01

Journal:JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY

Included Journals:SCIE、EI

Volume:28

Issue:18

Page Number:1835-1845

ISSN No.:0169-4243

Key Words:aramid fiber; interface; mechanical testing; fractography; composite adhesive joints

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.