| 热模压预成型工艺参数对复合材料帽型长桁质量的影响 |
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| 引用本文： | 李哲夫,谈源,张俭,岳广全,刘卫平,孙宝忠. 热模压预成型工艺参数对复合材料帽型长桁质量的影响[J]. 复合材料学报, 2021, 38(10): 3270-3280. DOI: 10.13801/j.cnki.fhclxb.20201215.004 |
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| 作者姓名： | 李哲夫 谈源 张俭 岳广全 刘卫平 孙宝忠 |
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| 作者单位： | 东华大学 纺织学院,上海201620;东华大学 民用航空复合材料协同创新中心,上海201620;常州市新创智能科技有限公司,常州213135;东华大学 民用航空复合材料协同创新中心,上海201620;上海飞机制造有限公司,上海201324 |
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| 基金项目： | 上海市科技创新行动计划项目(19DZ1100300)；国家商用飞机制造工程技术研究中心创新基金项目(COMAC-SFGS-2019-344) |
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| 摘 要： | 本文采用热模压预成装置将碳纤维单向预浸料层板制备成帽型结构长桁预成型体，通过对不同工艺条件下制备的帽型长桁预成型体的表观质量、厚度和纤维偏转角度进行检测，考察和分析了成型温度和速度对预成型体质量的影响规律。当成型温度较低时，由于树脂的黏度较高，预浸料层间摩擦力较大。预成型体表面出现褶皱现象，并且纤维由于受到层间剪切的作用而出现角度偏转。当成型温度较高时，树脂受到压力作用更易流动。这不仅降低了预成型体的厚度，同时也减弱了树脂束缚纤维的能力，使纤维偏转角度增加。而当成型速度增加时，预浸料层间的摩擦力使纤维的偏转角度增大。因此在预成型过程中，为了提高预成型质量，工艺温度和成型速度应控制在一定范围内。
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| 关 键 词： | 复合材料预成型体 帽型长桁 预浸料 成型质量 纤维变形 |
| 收稿时间： | 2020-10-14 |
Effects of hot stamp forming process parameters on quality of the hat-shaped structure preforms of composites |
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| Affiliation: | 1.College of Textiles, Donghua University, Shanghai 201620, China2.Changzhou New Intelligent Technology CO. LTD., Changzhou 213135, China3.Center for Civil Aviation Composites, Donghua University, Shanghai 201620, China4.Shanghai Aircraft Manufacturing CO. LTD., Shanghai 201324, China |
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| Abstract: | In this paper, the hat-shaped structure preforms of carbon fiber unidirectional prepreg laminate were pre-formed with the hot stamp forming device. The effects of temperature and forming speed were investigated by measuring the apparent mass, thickness and fiber deflection angle of preforms. A relatively great friction force between prepreg layers is observed at low temperatures due to the low viscosity of the resin, which causes the wrinkle on the surface of hat-shaped structure preforms and angle deflection of fiber by the inter-ply shearing. At high temperature, the fluidity of the resin is enhanced under the pressure. Not only the thickness of preforms are reduced, but also the deflection angle of fiber is increased due to the ability of resin to bind the fiber being diminished. As the increase of forming speed, the deflection angle of the fiber shows an increasing trend. Therefore, the temperature and forming speed must be controlled to improve the preforming quality. |
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