PMI泡沫夹层碳纤维复合材料的制备及力学表征

doi:10.19936/j.cnki.2096-8000.20210428.013

复合材料科学与工程 ›› 2021, Vol. 0 ›› Issue (4): 89-92.DOI: 10.19936/j.cnki.2096-8000.20210428.013

PMI泡沫夹层碳纤维复合材料的制备及力学表征

原崇新¹, 董青海^1*, 何斌²

1.中国商飞上海飞机制造有限公司复合材料中心,上海200123;
2.湖南兆恒材料科技有限公司,长沙410200

收稿日期:2020-06-24 出版日期:2021-04-28 发布日期:2021-04-30
通讯作者: 董青海(1987-),男,硕士,工程师,主要从事复合材料技术方面的研究。
作者简介:原崇新(1984-),博士,高级工程师,研究方向为复合材料工艺和试验分析。
基金资助:
国家自然科学基金面上项目(51875159)

MANUFACTURING AND VIRTUAL TEST MODEL OF PMI FOAM SANDWICH COMPOSITE STRUCTURES

YUAN Chong-xin¹, DONG Qing-hai^1*, HE Bin²

1. Composite Center, Shanghai Aircraft Manufacturing Co., Ltd., Shanghai 200123, China;
2. Hunan Zhaoheng Material Technology Ltd., Changsha 410200, China

Received:2020-06-24 Online:2021-04-28 Published:2021-04-30

摘要/Abstract

摘要： 由于具有较好的力学性能和工艺稳定性,聚甲基丙烯酰亚胺(PMI)泡沫夹层结构在航空领域得到了大量的应用。目前飞机上通常采用预浸料与泡沫热压罐固化制造夹层结构,这种工艺成本较高且只能保证贴模面的表面质量。本文中采用闭模液体成型工艺制备了质量稳定的泡沫夹层结构,对比了同时注胶与交替注胶的制备方法,结果表明交替注胶可以得到更好的成型质量。并对泡沫芯材的力学性能进行了测试,在此基础上建立了泡沫材料的失效模型,并通过有限元分析了其三点弯曲、侧压屈曲等力学性能,有限元模型分析结果与实际测试结果基本一致,有限元模型可揭示在这些加载条件下夹层结构的破坏机理及渐进损伤过程,研究结果可推动高性能的航空用复合材料夹层结构的低成本化制备以及结构服役的虚拟试验。

关键词: PMI泡沫, 夹层结构, 闭模RTM, 后屈曲, 有限元, 复合材料

Abstract: Due to its high mechanical properties and processing stability, the polyimide foam sandwich structure has been widely used in aerospace. At present, the sandwich structure is mainly manufactured using the prepreg and is cured in the autoclave. This process is relatively high-cost and only provides the surface quality of the die surface. In this paper, a closed-mold liquid molding process is used to manufacture a foam sandwich structure. The simultaneous injection and alternate injection are compared. The results show that alternate injection can obtain better molding quality. In addition, the mechanical properties of the foam were tested. On this basis, the failure model of the foam was established, and its mechanical properties such as three-point bending and lateral compression buckling were carried out by finite element method. These finite element models have been verified by actual experiments and revealed the failure mechanism of the sandwich structure under these loading conditions. The research results can promote the low-cost preparation of high-performance aviation composite sandwich structures and the prediction of structural performance.

Key words: PMI foam, foam sandwich structure, closed-mold RTM, post-buckling, finite element, composites

中图分类号:

TB332

原崇新, 董青海, 何斌. PMI泡沫夹层碳纤维复合材料的制备及力学表征[J]. 复合材料科学与工程, 2021, 0(4): 89-92.

YUAN Chong-xin, DONG Qing-hai, HE Bin. MANUFACTURING AND VIRTUAL TEST MODEL OF PMI FOAM SANDWICH COMPOSITE STRUCTURES[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(4): 89-92.

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PMI泡沫夹层碳纤维复合材料的制备及力学表征

MANUFACTURING AND VIRTUAL TEST MODEL OF PMI FOAM SANDWICH COMPOSITE STRUCTURES

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