不同复合材料板簧的性能比较及结构优化

复合材料科学与工程 ›› 2020, Vol. 0 ›› Issue (6): 35-45.

不同复合材料板簧的性能比较及结构优化

陈广豪, 梁智洪, 张芝芳^*

广州大学广州大学-淡江大学工程结构灾害与控制联合研究中心,广州510006

收稿日期:2020-03-24 出版日期:2020-06-28 发布日期:2020-06-28
通讯作者: 张芝芳(1985-),女,博士,副研究员,主要从事复合材料结构设计和复合结构损伤评估方面的研究,zfzhang@gzhu.edu.cn。
作者简介:陈广豪(1995-),男,硕士生,主要从事复合材料结构设计方面的研究。
基金资助:
国家自然科学基金项目(51508118);广东省自然科学基金项目(2019A1515011116);广州大学研究生创新研究资助计划(2018GDJC-M37)

PERFORMANCE COMPARISON AND STRUCTURAL OPTIMIZATION OF LEAF SPRINGS OF DIFFERENT COMPOSITES

CHEN Guang-hao, LIANG Zhi-hong, ZHANG Zhi-fang^*

Guangzhou University-Tamkang University Joint Research Center for Engineering Structure
Disaster Prevention and Control, Guangzhou 510006, China

Received:2020-03-24 Online:2020-06-28 Published:2020-06-28

摘要/Abstract

摘要： 随着汽车行业日益激烈的竞争和环境问题的不断凸显,有必要对汽车部件进行优化减重设计。本文利用CATIA三维软件建立了某轻型汽车的板簧几何模型,并导入ANSYS 15.0有限元软件中,分别赋予其五种材料属性,包括传统金属材料和四种新型纤维增强复合材料(E玻纤、S玻纤、碳纤、凯夫拉增强纤维)。计算并对比双片钢板板簧、双片复合材料板簧和单片复合材料板簧的应力、挠度、刚度及重量,所得结果表明,在满足板簧性能指标的前提下,单片E玻纤复合材料板簧具有最优的性价比,重量相比传统钢材板簧减轻了80%。为进一步减轻单片E玻纤复合材料板簧的重量,对其应力较小区域进行变截面宽度的结构优化。结果表明优化后的单片变宽度E玻纤复合材料板簧重量相比优化前板簧,进一步减重5.2%。对钢板板簧及优化前后的单片E-玻纤复合材料板簧的安全系数、振动频率及应变能等进行综合比较,结果表明,结构优化后的单片变宽度E玻纤复合材料板簧性能符合要求,性价比高,且减重效果显著。

关键词: 复合材料, 板簧, 结构优化, 有限元分析

Abstract: With the increasing competition in the automotive industry and the growing demands of environmental protection, it is necessary to optimize and reduce the weight of vehicle components design. In this paper, the geometry model of the leaf spring of a typical vehicle was established using CATIA 3D. Then it was imported into ANSYS 15.0 for construction of the finite element model (FEM). Five different material properties were defined in the FE model including steel and four types of fiber reinforced composites (E-glass/epoxy, S-glass/epoxy, Carbon/epoxy and Kevlar/epoxy). The stress, deformation, stiffness and weight of the leaf spring were obtained from FEM and then were compared to each other for the double-leaf steel spring, double-leaf composite springs (of four composite properties) and mono-leaf composite spring (of four composite properties). The results show that the mono E-glass/epoxy composite leaf spring has the best performance price ratio, and the weight is reduced by 80% compared to the traditional steel leaf spring. In regard to the fact that there is section in leaf spring with very low stress under vehicle loading, the structural optimization was conducted to develop a mono E-glass/epoxy composite leaf spring with varied section width. The component weight, the safety factor, natural frequency and strain energy of the mono E-glass/epoxy composite leaf spring before and after the optimization were compared, and the results show that the mono E-glass/epoxy composite leaf spring with variable width after the optimization has satisfactory performance, with low cost and further 5% weight reduction.

Key words: FRP composite, leaf spring, structural optimization, finite element analysis

中图分类号:

TB332

陈广豪, 梁智洪, 张芝芳. 不同复合材料板簧的性能比较及结构优化[J]. 复合材料科学与工程, 2020, 0(6): 35-45.

CHEN Guang-hao, LIANG Zhi-hong, ZHANG Zhi-fang. PERFORMANCE COMPARISON AND STRUCTURAL OPTIMIZATION OF LEAF SPRINGS OF DIFFERENT COMPOSITES[J]. Composites Science and Engineering, 2020, 0(6): 35-45.

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