Mechanical performance of carbon fiber/epoxy composites cured by self-resistance electric heating method
Mechanical performance of carbon fiber/epoxy composites cured by self-resistance electric heating method
复制标题
自电阻电加热法固化碳纤维/环氧复合材料力学性能
DOI：
10.1007/s00170-019-03707-0
复制
发表时间：
2019-08-01
影响因子：
3.4
通讯作者：
Lu, Yong
中科院分区：
文献类型：
--
作者：
Liu, Shuting;Li, Yingguang;Lu, Yong
碳纤维增强塑料自电阻电加热（SRE）由于其加热均匀、快速加热/冷却、低能耗和低设备投资的特点而被认为是一种可替代高压釜外技术的技术。本文进行了一系列SRE加热实验，表征了SRE固化过程的温度分布场、能耗和固化时间。进行了全面的力学测试和微观表征。实验结果表明，SRE固化过程升温速率过快，导致基体性能下降，最终导致复合材料构件的压缩和弯曲强度降低，而纤维优先加热效应可以显著提高纤维-树脂界面强度，因为沿界面区域自然形成的温度差沿着增强了界面周围树脂的粘合强度，这改善了宏观张力和层间剪切强度。
Carbon fiber reinforced plastic self-resistance electric (SRE) heating has been conceived as an alternative to out-of-autoclave technology due to its characteristics of uniform heating, fast heating/cooling, low energy consumption, and low equipment investment. In this work, a series of SRE heating experiments were conducted, in which the temperature distribution field, energy consumption, and curing time of SRE curing process were characterized. Comprehensive mechanical tests and microscopic characterization were carried out. The experimental results exhibit that the rapid heating rate of SRE curing process resulted in a weaker matrix performance because of the insufficient time of void elimination, which finally leads to an inferior compression and flexural strength for the composite part, while the fiber preferential heating effect can significantly improve the fiber-resin interfacial strength, because the naturally formed temperature difference along the interfacial area enhanced the adhesive strength of the resin around the interface, which improved the macroscopic tension and interlaminar shear strength.