Experimental investigation of interfacial fracture behavior in foam core sandwich beams with visco-elastic adhesive interface

被引：24

作者：

Can, Wang ^{[1
]}

Hao-ran, Chen ^{[1
]}

Zhen-kun, Lei ^{[1
]}

机构：

[1] Dalian Univ Technol, State Key Lab Struct Anal Ind Equipment, Dalian 116024, Peoples R China

来源：

COMPOSITE STRUCTURES | 2010年 / 92卷 / 05期

基金：

美国国家科学基金会;

关键词：

Interfacial fracture; Toughness enhancement; Visco-elastic; Crack opening displacement; Digital image correlation; Composite sandwich structures; CRACK KINKING; DELAMINATION;

D O I：

10.1016/j.compstruct.2009.10.011

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

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.

引用

页码：1085 / 1091

页数：7

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