The determination of the mode II adhesive fracture resistance, GIIC, of structural adhesive joints:: an effective crack length approach

被引：150

作者：

Blackman, BRK ^{[1
]}

Kinloch, AJ ^{[1
]}

Paraschl, M ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Dept Mech Engn, London SW7 2BX, England

来源：

ENGINEERING FRACTURE MECHANICS | 2005年 / 72卷 / 06期

基金：

英国工程与自然科学研究理事会;

关键词：

adhesive joints; mode II; fracture mechanics; corrected beam theory; end-loaded split test; microcracking; effective crack length;

D O I：

10.1016/j.engfracmech.2004.08.007

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This paper reports results from the mode II testing of adhesively-bonded carbon-fibre-reinforced composite substrates using the end-loaded split (ELS) method. Two toughened, structural epoxy adhesives were employed (a general purpose grade epoxy-paste adhesive, and an aerospace grade epoxy-film adhesive). Linear Elastic Fracture Mechanics was employed to determine values of the mode II adhesive fracture energy, G(IIC) for the joints via various forms of corrected beam theory. The concept of an effective crack length is invoked and this is then used to calculate values of G(IIC).. The corrected beam theory analyses worked consistently for the joints bonded with the epoxy-paste adhesive, but discrepancies were encountered when analysing the results of joints bonded with the epoxy-film adhesive. During these experiments, a microcracked region ahead of the main crack was observed, which led to difficulties in defining the true crack length. The effective crack length approach provides an insight into the likely errors encountered when attempting to measure mode II crack growth experimentally. (C) 2004 Elsevier Ltd. All rights reserved.

引用

页码：877 / 897

页数：21

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