Thermostamping Simulation of a Carbon Fiber-Reinforced PAEK Composite Stringer

Andi Haris, Yi Wen Cheah, Wern Sze Teo
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Abstract

The results of thermostamping simulation of a composite stringer demonstrator made from a high temperature plastic (PAEK) reinforced with 5-Harness Satin (5HS) weave carbon fiber fabric are presented in this paper. The effects of four different gripping configurations (A, B, C and D) and four different laminate layups ([0f]4 cross-ply, [45f]4 angle-ply, [0f/45f]s and [45f/0f]s quasi-isotropic layups) on the quality of the formed part are computationally investigated using AniForm™ software. The gripping configuration A consists of 22 pieces of extension spring with stiffness of 0.17 N/mm and pretension of 5.50 N. The configuration B consists of 8 pieces of extension spring with stiffness of 0.51 N/mm and pretension of 16.25 N. The configuration C uses the same type of spring as used in the configuration B, only its quantity is more (12 pieces). The configuration D is similar to the configuration C but they are different in the spring arrangement. Our simulation results show that regardless of the gripping configuration the quasi-isotropic layups demonstrate the lowest laminate sag while the angle-ply layup demonstrates the highest shear angle and thickness. For the slip-path length, it strongly depends on the layup and gripping configuration. As conclusion, the optimal choices for the thermoformed composite stringer demonstrator are cross-ply layup with configuration C, angle-ply layup and [45f/0f]s quasi-isotropic layup with configuration D, and [0f/45f]s quasi-isotropic layup with configuration B.
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碳纤维增强 PAEK 复合材料弦杆的热冲压模拟
本文介绍了由高温塑料(PAEK)和 5-Harness Satin(5HS)编织碳纤维织物增强的复合材料支撑杆演示器的热压成型模拟结果。使用 AniForm™ 软件计算研究了四种不同的夹持配置(A、B、C 和 D)和四种不同的层压板铺层([0f]4 交叉层、[45f]4 角层、[0f/45f]s 和 [45f/0f]s 准各向同性铺层)对成型部件质量的影响。夹持配置 A 由 22 片拉伸弹簧组成,刚度为 0.17 N/mm,预拉力为 5.50 N;配置 B 由 8 片拉伸弹簧组成,刚度为 0.51 N/mm,预拉力为 16.25 N。配置 D 与配置 C 相似,但在弹簧布置上有所不同。我们的模拟结果表明,无论采用哪种夹持结构,准各向同性层叠结构的层压板下垂度最小,而角层层叠结构的剪切角和厚度最大。至于滑移路径长度,则在很大程度上取决于层叠和夹持结构。综上所述,热成型复合材料支柱演示器的最佳选择是配置 C 的交叉层叠、配置 D 的角层叠和[45f/0f]s 准各向同性层叠,以及配置 B 的[0f/45f]s 准各向同性层叠。
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