暴露温度对准静态压缩下碳/环氧复合矩形管耐撞性的影响。

Effect of Exposure Temperature on the Crashworthiness of Carbon/Epoxy Composite Rectangular Tubes Under Quasi-Static Compression.

作者信息

Sebaey Tamer A

机构信息

Engineering Management Department, College of Engineering, Prince Sultan University, Riyadh 66833, Saudi Arabia.

Mechanical Design and Production Department, Faculty of Engineering, Zagazig University, Zagazig 44519, Egypt.

出版信息

Polymers (Basel). 2020 Sep 5;12(9):2028. doi: 10.3390/polym12092028.

DOI:10.3390/polym12092028

PMID:32899461

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7564856/

Abstract

The exposure of polymeric composites to thermal loading is a ubiquitous problem that leads to the degradation of mechanical properties, reducing the service life of an engineered structure, and potentially premature, catastrophic modes of failure. In the current paper, an experimental study is presented in order to investigate the effect of thermal exposure on the crushing performance of carbon fiber-reinforced plastic (CFRP) composite tubes. Specimens of rectangular tubes are subjected to thermal exposure at 90, 120, 150 and 180 °C before being crushed under quasi-static loading. The results showed a reduction in the peak load by increasing the aging temperature up to °C, which is followed by an increase in the peak load at 150 °C, due to post-curing. For the energy absorbed and the specific energy, a sharp reduction is recorded (up to 70% reduction) due to thermal aging. These results showed that the effect of thermal exposure on crashworthiness needs more attention during composites' design, especially for transportation applications.

摘要

聚合物复合材料承受热负荷是一个普遍存在的问题，它会导致机械性能下降，缩短工程结构的使用寿命，并可能引发过早的灾难性失效模式。在本文中，进行了一项实验研究，以调查热暴露对碳纤维增强塑料（CFRP）复合管挤压性能的影响。矩形管试样在90、120、150和180°C下进行热暴露，然后在准静态载荷下进行挤压。结果表明，随着老化温度升高至120°C，峰值载荷降低，而在150°C时，由于后固化作用，峰值载荷增加。对于吸收能量和比能，热老化导致其急剧降低（降低幅度高达70%）。这些结果表明，在复合材料设计过程中，热暴露对耐撞性的影响需要更多关注，尤其是在运输应用方面。