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碳纤维汽车前地板DV测试对其变形影响研究

2020-10-21刘宾宾王文印

科技创新与应用 2020年30期
关键词:碳纤维

刘宾宾 王文印

摘  要:为了验证碳纤维汽车前地板DV测试对其变形是否有影响,文章以碳纤维预浸料(ACTECH1201/SYT45)为成型材料,以模压成型工艺为基础,选择外型相对复杂、尺寸相对较大的汽车车身前地板作为研究对象,实现一体模压成型前地板,对总成的前地板进行DV测试(耐热老化测试、耐高低温循环测试),在检具上对测试前、后的前地板总成进行全尺寸检测,得到:碳纤维前地板总成的全尺寸检测基本符合汽车车身的装车要求;耐热老化测试对前地板总成的面轮廓度基本无影响,可满足设计要求;耐高低温循环测试对前地板总成的面轮廓度有一定影响,但整体影响较小,可满足设计要求。

关键词:碳纤维;前地板;汽车车身;面轮廓度

中图分类号:TB332 文献标志码:A         文章编号:2095-2945(2020)30-0057-03

Abstract: In order to verify whether the DV test of the carbon fiber automobile front floor has an impact on its deformation, in this paper, the carbon fiber rapid prepreg (ACTECH1201/SYT45) is used as the molding material. Based on the molding process, the front floor of automobile body with relatively complex appearance and large size is selected as the research object to realize the integrated molding front floor, DV test (heat-resistant aging test, and high and low temperature resistance cycle test) is carried out on the front floor of the assembly, and full-scale inspection is carried on the front floor assembly before and after the test on the inspection tool. The following results are obtained: The full-scale test of the carbon fiber front floor assembly basically meets the loading requirements of the automobile body; the heat-resistant aging test has no effect on the surface profile of the front floor assembly, which can meet the design requirements; the high and low temperature resistance cycle test has a certain impact on the surface profile of the front floor assembly, but the overall impact is small, so it can meet the design requirements.

Keywords: carbon fiber; front floor; automobile body; surface profile

1 概述

汽車轻量化作为有效的节能和环保措施,在未来成为汽车行业大力发展的趋势,其中碳纤维复合材料在轻量化上有极大的优势将作为节能和新能源汽车领域的重要发展方向[1],碳纤维复合材料应用在汽车车身零部件中,减轻质量效果尤为明显,比钢铁材料轻50%,比铝材轻30%[2],且有诸多特点:比强度、比模量高、抗疲劳性能好、破损安全性高、减震性好、各向异性、易于成型、耐腐蚀性好等[3],由于其各向异性的力学特性,碳纤维复合材料的结构形式和铺层方式都会对其性能产生影响,合理的结构形式和铺层方式能够在减轻结构重量的情况下提高结构的力学性能[4],同时可减少装配零件数量,使碳纤维零部件实现一体成型。……

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