A simple method for determining mode Ⅰ interlaminar fracture toughness of composite at low temperature

被引：0
|
作者：
Guo Z. [1 ]
Xu W. [1 ]
Yu Y. [1 ]
机构：
[1] School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2019年 / 36卷 / 05期
关键词：
Composite; Double cantilever beam; Double compliances method; Low temperature; Mode Ⅰ interlaminar fracture toughness;
D O I：
10.13801/j.cnki.fhclxb.20180725.004
中图分类号：
学科分类号：
摘要：
The current ASTM standard for measuring the mode Ⅰ interlaminar fracture toughness of composite requires to measure the crack growth length, which is a very tedious and difficult process for measuring the interlaminar fracture toughness in low temperature environment. To overcome the limitation of measuring the crack growth length, a double compliances method was used to measure the mode Ⅰ interlaminar fracture toughness. The process of this method was nearly the same as that recommended in the ASTM, except avoiding measuring the crack growth length. To verify the accuracy of this method, five double cantilever beam (DCB) specimens made of carbon fiber reinforced epoxy composites were tested at -10℃ environment. The fracture toughness were determined by using the methods recommended by the ASTM standard and the present double compliances method. The result shows that the relative difference of the fracture toughness obtained from the ASTM methods and the double compliances method is within 5%. Therefore, the present paper provides a simple and reliable method for determining the mode Ⅰ interlaminar fracture toughness of composite in the low temperature environment. © 2019, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
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页码：1210 / 1215
页数：5
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