4.7 Article

Effect of Thermal Ageing on the Mechanical Strength of Carbon Fibre Reinforced Epoxy Composites

期刊

POLYMERS
卷 13, 期 12, 页码 -

出版社

MDPI
DOI: 10.3390/polym13122006

关键词

thermo-oxidative; temperature; mechanical properties; carbon fabric; CFRP; thermoset

向作者/读者索取更多资源

The study found that exposure of carbon fiber reinforced polymers to high temperatures can lead to permanent changes in their mechanical properties, particularly above the glass transition temperature of the resin. Even a brief exposure to operating temperatures above Tg could substantially impair the load-carrying capability of CFRP components.
Applications of Carbon Fibre Reinforced Polymers (CFRP) at temperatures over 150-200 degrees C are becoming common in aerospace and automotive applications. Exposure of CFRP to these temperatures can lead to permanent changes in their mechanical properties. In this work, we investigated the effect of thermal ageing in air on the strength of carbon fabric/epoxy composites. To this end, accelerated artificial ageing at different temperatures was performed on carbon fabric/epoxy specimens. The flexural and interlaminar shear strengths of the aged specimens were assessed by three-point bending and short beam shear tests, respectively, and compared to those of unaged samples. For ageing at temperatures below the glass transition temperature of the resin, Tg, a moderate reduction of strength was found, with a maximum decrease of 25% for 2160 h at 75% Tg. On the other hand, a rapid strength decrease was observed for ageing temperatures above Tg. This was attributed to degradation of the epoxy matrix and of the fibre/epoxy interface. In particular, a 30% strength decrease was found for less than 6 h at 145% Tg. Therefore, it was concluded that even a short exposure to operating temperatures above Tg could substantially impair the load-carrying capability of CFRP components.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据