超薄热塑性复合材料人形杆制备及其性能研究

doi:10.19936/j.cnki.2096-8000.20230728.009

摘要/Abstract

摘要： 薄层预浸料复合材料结构具有良好的弹性应变能调控、存储特性,在可展开、折叠结构,如空间可展开天线、太阳帆和光伏表面等方面具有重要应用价值。本文以碳纤维增强尼龙6(CF/PA6)为实验对象,首先,用单层厚度为0.045 mm和0.105 mm的CF/PA6复合材料分别制备1 mm厚的单向层合板,对其进行了弯曲性能测试和弯曲破坏后微观形貌的对比分析,然后采用非对称铺层设计方法及真空热压一次成型工艺制备了复合材料人形杆,对人形杆的法兰展开行为、收拢弯曲承载行为进行了实验测试。结果表明:单层厚度减薄57%,层合板的弯曲强度和弯曲模量分别提高了24.8%、17%,有效抑制了复合材料的层间裂纹扩展;铺层结构直接影响人形杆可展开、收拢变形行为,增加0°铺层所占比例,人形杆的比刚度和比强度均有所提高。实验结果为热塑性复合材料可展开结构的设计与性能评价提供了基础。

关键词: 超薄, 热塑性复合材料, 碳纤维, 人形杆, 可展开

Abstract: Thin-ply prepreg composites show great potential applications in space deployable antenna, solar sail and photovoltaic surface owing to their good elastic strain energy regulation, storage characteristics, and folding deployable structures. This paper introduces ultra-thin carbon fiber reinforced polyamide 6 (CF/PA6) composites and fabricate into TRAC boom using vacuum-assisted hot pressing in an asymmetric ply sequence. Firstly, 1 mm thick one-way laminate was prepared with CF/PA6 composites with a thickness of 0.045 mm and 0.105 mm, respectively, and the flexural performance test and the comparative analysis of the micromorphology after bending failure were carried out. Then, the composite TRAC boom was prepared by asymmetric layup design method and vacuum hot pressing primary molding process. Experimental tests were carried out on the unfolding behavior of the TRAC boom flange and the folding and flexural bearing behavior. The results show that the thickness of the single layer is reduced by 57%, and the bending strength and bending modulus of the laminate are increased by 24.8% and 17%, respectively, which effectively inhibits the interlayer crack propagation of the composite material. The layup structure directly affects the unfolding and closing deformation behavior of the TRAC boom, increasing the proportion of 0° paving, and the specific stiffness and specific strength of the TRAC boom are improved. The experimental results provide a basis for the design and performance evaluation of the deployable structure of thermoplastic composites.

Key words: ultra-thin, thermoplastic composites, carbon fiber, TRAC boom, deployable

中图分类号:

TB332

马心旗, 宗文波, 张竹青, 蒋林, 桑琳, 吴海宏. 超薄热塑性复合材料人形杆制备及其性能研究[J]. 复合材料科学与工程, 2023, 0(7): 65-71.

MA Xinqi, ZONG Wenbo, ZHANG Zhuqing, JIANG Lin, SANG Lin, WU Haihong. Preparation and research of ultra-thin thermoplastic composite TRAC boom[J]. COMPOSITES SCIENCE AND ENGINEERING, 2023, 0(7): 65-71.

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