A new semi-empirical law for variable stress-ratio and mixed-mode fatigue delamination growth

被引：38
作者：
Allegri, G. [1 ]
Wisnom, M. R. [1 ]
Hallett, S. R. [1 ]
机构：
[1] Univ Bristol, Adv Composites Ctr Innovat & Sci ACCIS, Bristol BS8 1TR, Avon, England
来源：
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING | 2013年 / 48卷
基金：
英国工程与自然科学研究理事会;
关键词：
Carbon fibre; Delamination; Fatigue; Analytical modelling; FRACTURE-TOUGHNESS; CRACK-GROWTH; COMPOSITES;
D O I：
10.1016/j.compositesa.2013.01.018
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A new semi-empirical equation that describes the fatigue delamination growth in fibre reinforced toughened epoxies is presented and validated against data available in the literature. The new law accounts for the simultaneous effects of the stress-ratio and mode-mixity on the interlaminar crack propagation. If delamination propagation thresholds are ignored, the proposed semi-empirical equation allows describing interlaminar crack propagation employing only three material dependent parameters, whereas alternative models presented in the literature require four. If reliable threshold data are available from experimental tests, the new semi-empirical law can be extended to a unified description of stress-ratio, mode-mixity and thresholds effects using six material dependent parameters. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：192 / 200
页数：9
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