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论文类型：期刊论文

发表时间：2012-11-01

发表刊物：COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING

收录刊物：SCIE、EI

卷号：43

期号：11

页面范围：2059-2064

ISSN号：1359-835X

关键字：Aramid fiber; Interface; Fractography; Short fiber toughening

摘要：Interfacial toughness and toughening mechanisms of a sandwich beam, consisting of an aluminum foam covered with two carbon-fiber/epoxy composite surface layers, are investigated in this study. To improve the interfacial toughness of the sandwich beam, short aramid fiber of different lengths and densities were inserted at the interface during the sandwich fabrication process. The interfacial toughness between face-sheet and core was then measured through the Double Cantilever Beam test for various sandwich designs. Improvements of varying degrees in the interfacial toughness were observed for all specimens toughened with short aramid fibers of different lengths. The interfacial toughening performance and underlying mechanisms for energy absorption were discussed and analyzed using scanning electron microscopy. Crown Copyright (c) 2012 Published by Elsevier Ltd. All rights reserved.