Characterization of Joule heating and deconsolidation behavior of continuous carbon fiber reinforced polyamide 6 composites under self-resistance electric heating,Polymer Composites

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Characterization of Joule heating and deconsolidation behavior of continuous carbon fiber reinforced polyamide 6 composites under self-resistance electric heating
Polymer Composites ( IF 4.8 ) Pub Date : 2021-09-13 , DOI: 10.1002/pc.26308
Yunhuan Liu ₁ , Huaping Tang ₁ , Xiaoyu Wang ₁ , Zhanyu Zhai _{1,

2}

Affiliation

As an effective heating method, self-resistance electric (SRE) heating was applied for welding, hot stamping and curing process of composites. In this study, the characterization of Joule heating and deconsolidation behavior of continuous carbon fiber reinforced polyamide 6 (CFR-PA6) laminate under SRE heating were investigated. A series of experiments were performed to build the relationship among geometry sizes, current density and temperature response. Then the relationship between the temperature rising rate and current density of CFR-PA6 laminate with twill weave fabric was determined. The temperature evolution of specimen with a hole under SRE heating was also discussed. Furthermore, the deconsolidation behavior of CFR-PA6 specimens under SRE heating as well as oven heating was characterized through macroscopic and mesoscopic properties. The interlaminar shear strength (ILSS) tests of specimens were also conducted. The results indicate that the temperature response of CFR-PA6 laminate is mainly determined by the current density and their relationship can be described by a quadratic function. It is found that voids appear both inside the fiber bundles and resin-rich areas owing to the thermal mismatch between the resin and carbon fibers after SRE heating, while no voids inside the fiber bundles were observed after oven heating. The deconsolidation behavior of laminate after SRE heating reduces the ILSS.

中文翻译：

自阻电加热下连续碳纤维增强聚酰胺6复合材料焦耳热解固结行为表征

作为一种有效的加热方法，自电阻电（SRE）加热被应用于复合材料的焊接、热冲压和固化过程。在这项研究中，研究了连续碳纤维增强聚酰胺 6 (CFR-PA6) 层压板在 SRE 加热下的焦耳加热和解固结行为的表征。进行了一系列实验以建立几何尺寸、电流密度和温度响应之间的关系。然后确定了斜纹织物的CFR-PA6层压板的升温速率与电流密度之间的关系。还讨论了带孔试样在 SRE 加热下的温度演变。此外，CFR-PA6 试样在 SRE 加热和烘箱加热下的解固结行为通过宏观和细观特性表征。还进行了试样的层间剪切强度（ILSS）测试。结果表明，CFR-PA6 层压板的温度响应主要由电流密度决定，它们的关系可以用二次函数来描述。发现由于SRE加热后树脂和碳纤维之间的热失配，纤维束内部和富树脂区域均出现空隙，而烘箱加热后纤维束内部未观察到空隙。SRE 加热后层压板的解固作用降低了 ILSS。发现由于SRE加热后树脂和碳纤维之间的热失配，纤维束内部和富树脂区域均出现空隙，而烘箱加热后纤维束内部未观察到空隙。SRE 加热后层压板的解固作用降低了 ILSS。发现由于SRE加热后树脂和碳纤维之间的热失配，纤维束内部和富树脂区域均出现空隙，而烘箱加热后纤维束内部未观察到空隙。SRE 加热后层压板的解固作用降低了 ILSS。

更新日期：2021-09-13

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