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论文类型：期刊论文

发表时间：2014-09-01

发表刊物：JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY

收录刊物：SCIE、EI

卷号：28

期号：18

页面范围：1835-1845

ISSN号：0169-4243

关键字：aramid fiber; interface; mechanical testing; fractography; composite adhesive joints

摘要：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.