Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2014-09-01

Journal: JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY

Included Journals: EI、SCIE

Volume: 28

Issue: 18

Page Number: 1835-1845

ISSN: 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.