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论文类型：期刊论文
发表时间：2010-04-01
发表刊物：COMPOSITE STRUCTURES
收录刊物：SCIE、EI
卷号：92
期号：5
页面范围：1085-1091
ISSN号：0263-8223
关键字：Interfacial fracture; Toughness enhancement; Visco-elastic; Crack opening displacement; Digital image correlation; Composite sandwich structures
摘要：Interfacial toughness as well as toughness enhancement and long term interfacial fracture behavior in sandwich beams were experimentally examined. The interfacial toughness was enhanced by inserting a chopped glass fiber mat at the interface during the fabrication process. Robust interfacial load capacity and improved toughness were obtained by the method. The long term interfacial fracture behavior presents the characteristics of the three-parameter solid (standard solid) model. The results of the long term fracture tests show a significant increment in crack opening displacement and nominal stress intensity factors. It indicates that during the process of structural design and analysis the interfacial fracture resistance may be overestimated without taking the visco-elastic effect of the materials of the structure into consideration. (C) 2009 Elsevier Ltd. All rights reserved.