Effects of strain rate and high temperature environment on the mechanical performance of carbon fiber reinforced thermoplastic composites fabricated by hot press molding
Effects of strain rate and high temperature environment on the mechanical performance of carbon fiber reinforced thermoplastic composites fabricated by hot press molding
复制标题
应变速率和高温环境对热压成型碳纤维增强热塑性复合材料力学性能的影响
DOI：
10.1016/j.compositesa.2020.105905
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发表时间：
2020-07-01
影响因子：
8.7
通讯作者：
Wei, Junlei
中科院分区：
文献类型：
--
作者：
Zhang, Yiben;Sun, Lingyu;Wei, Junlei
通过准静态和动态试验，研究了热压成型连续大丝束碳纤维增强尼龙6层板的力学性能。讨论了铺层、应变速率和高温对材料性能的影响。结果表明，热塑性复合材料具有应变速率强化效应和高温弱化效应。不同的叠层板表现出不同的灵敏度。单向/正交层合板的弹性模量差随应变率的增加而减小，单向/准各向同性或单向/角向层合板的弹性模量差随应变率的增加而增大。但随着应变率的增加，破坏强度差变化不大。单向层合板与其他层合板之间的弹性模量或强度差随温度的升高而减小。高温对拉伸力学性能的弱化作用强于应变率的强化作用。并对其失效行为和机理进行了分析。这些实验数据和研究结果可以为高性能热塑性复合材料的研究提供一些启示。
The mechanical performance of continuous large tow carbon fiber reinforced polyamide 6 laminates fabricated by hot press molding was studied using quasi-static and dynamic tests. The effects of layup, strain rate and high temperature were discussed. The results show that the thermoplastic composites possess strain rate strengthening effects and high temperature weakening dependence. Different layup laminates exhibit different sensitivities. The elastic modulus difference of unidirection/cross-ply laminates decreases but that of unidirection/quasi-isotropic or unidirection/angle-ply laminates increases with the increasing strain rate. However, the failure strength difference changes insignificantly as the strain rate increases. The modulus or strength difference between unidirectional laminate and the other laminates decreases with the increasing temperature. The weakening effect of high temperature is stronger than the strengthening effect of strain rate for tensile mechanical properties. Furthermore, the failure behavior and mechanism were analyzed. These experimental data and research results could provide some insight for high-performance thermoplastic composites.