• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2022, Vol. 58 ›› Issue (6): 194-201.doi: 10.3901/JME.2022.06.194

• 运载工程 • 上一篇    下一篇

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复合材料包裹十二直角薄壁梁弯曲理论分析方法

陈光1, 魏晨阳1, 解东旋2, 郑楠纤1, 冯玉鹏1, 陈勇1   

  1. 1. 河北工业大学天津市新能源汽车传动与安全重点实验室 天津 300130;
    2. 长春工业大学计算机科学与工程学院 长春 130000
  • 收稿日期:2021-04-11 修回日期:2021-10-20 出版日期:2022-03-20 发布日期:2022-05-19
  • 通讯作者: 解东旋,男,1989年出生,博士,讲师。主要研究方向为智能网联汽车,曾开展过车身结构设计与优化、有限元分析和金属成形技术等研究工作。E-mail:xiedx_jlu@163.com
  • 作者简介:陈光,女,1987年出生,博士,讲师。主要研究方向为汽车车身抗撞性与轻量化。E-mail:chenguang@hebut.edu.cn
  • 基金资助:
    河北省自然基金资助项目(E2019202201)。

Theoretical Study of Glass Fibre Reinforced Polymer-steel Hybrid Thin-walled Twelve-right-angle-section Beams under Bending Loading

CHEN Guang1, WEI Chenyang1, XIE Dongxuan2, ZHENG Nanxian1, FENG Yupeng1, CHEN Yong1   

  1. 1. Tianjin Key Laboratory of Power Transmission and Safety Technology for New Energy Vehicles, Hebei University of Technology, Tianjin 300130;
    2. School of Computer Science & Engineering, Changchun University of Technology, Changchun 130000
  • Received:2021-04-11 Revised:2021-10-20 Online:2022-03-20 Published:2022-05-19

摘要: 复合材料包裹金属十二直角薄壁梁具有良好的弯曲特性,应用于车身安全构件中可兼顾抗撞性和轻量化的需求。开发了一种适合应用于车身结构设计早期阶段的理论分析方法和程序,来获得该种薄壁梁的弯曲特性。首先,将复合材料包裹十二直角薄壁梁弯曲失效区域中的变形特征简化为塑性铰、滚动铰和平面拉伸三种能量耗散机制。进而,考虑了滚动铰运动方向和复合材料纤维方向夹角的瞬时变化的影响,推导了滚动铰塑性极限弯矩和滚动铰的能量耗散的理论表达式,建立整个薄壁梁的弯曲能量耗散平衡方程。最后,基于能量最小原则,求解弯曲变形区域特征长度,获得了复合材料包裹十二直角薄壁梁的弯曲特性(弯曲力矩-转角)曲线。与有限元分析的结果比较表明,所提出的理论分析方法可以准确地预测复合材料包裹十二直角薄壁梁的弯曲特性。

关键词: 复合材料包裹金属薄壁梁, 十二直角截面, 弯曲特性, 理论分析, 塑性极限弯矩

Abstract: The twelve-right-angled-section thin-walled beams wrapped by composites have excellent bending characteristics and can be used in vehicle body bending safety components that take into account both crashworthiness and lightweight. A theoretical method and process is developed to get the bending characteristics of the twelve-right-angled-section thin-walled beams wrapped by composites for the design of automobile body. Firstly, the deformation characteristics in the bending failure area of the hybrid thin-walled beams are simplified into three kinds of energy dissipation mechanism:plastic hinge, rolling hinge and plane tension. Furthermore, the angle between the composite fiber direction and the rolling hinge motion direction is considered as instantaneous, the plastic limit bending moment and the energy dissipation expressions of these rolling hinges in the bending failure area of the hybrid thin walled beam is deduced theoretically, and the entire bending energy dissipation balance equation of the thin-walled beams is established. Finally, based on the minimum energy principle, the bending moment-rotation angle curve of the wrapped beam is gained. Comparison with the results of finite element analysis demonstrates that the theoretical analysis method employed in this study can accurately predict the performance of thin-walled beams.

Key words: composites wrapping metal thin-walled beams, twelve-right-angled-section, bending characteristics, theoretical analysis, plastic limit bending moment

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