铝蜂窝填充CFRP结构的弯曲性能研究

玻璃钢/复合材料 ›› 2016, Vol. 0 ›› Issue (7): 48-52.

铝蜂窝填充CFRP结构的弯曲性能研究

刘强^1,2, 莫正伟¹

1.中山大学工学院,广州510006;
2.湖南大学机械学院,长沙410082

收稿日期:2016-03-15 出版日期:2016-07-28 发布日期:2016-07-28
作者简介:刘强(1981-),男,博士,副教授,主要从事碳纤维材料轻量化结构开发研究,570542280@qq.com。
基金资助:
国家自然科学基金(51205422);博士后基金(2015M582323);广东省自然科学基金(2015A030313016);珠江科技新星(2014J2200005)

EXPERIMENTAL AND NUMERICAL INVESTIGATION OF THE BENDING CHARACTERISTICS OF CFRP SQUARE TUBE FILLED WITH ALUMINUM HONEYCOMB

LIU Qiang^1,2, MO Zheng-wei¹

1.School of Engineering, Sun Yat-sen University, Guangzhou 510006, China;
2.School of Mechanical Engineering, Hunan University, Changsha 410082, China

Received:2016-03-15 Online:2016-07-28 Published:2016-07-28

摘要/Abstract

摘要： CFRP相对于金属材料更加轻质高强,并且具有良好的抗冲击性能和成型工艺性能,已成为未来汽车轻量化的重要材料。采用三点弯曲实验和有限元仿真相结合的方法,对铝蜂窝填充CFRP结构的侧向力学性能和破坏机理开展了研究。实验结果表明,相对CFRP空管,铝蜂窝填充管件的平均峰值载荷、吸收能量和比吸能率分别提高17.09%、32.31%和0.9%,并且破坏过程也更加稳定。此外,采用了Ls-dyna软件对其受力进行了有限元仿真,获得了与物理实验相吻合的破坏模式和力-位移曲线。研究表明,利用轻质铝蜂窝结构填充CFRP管件,能有效改善CFRP结构的侧向弯曲性能,对指导轻量化汽车结构的设计具有重要意义。

关键词: 轻量化, 铝蜂窝, CFRP, Ls-dyna, 弯曲性能

Abstract: Carbon fiber reinforced plastic (CFRP) has become the very important material for the lightweighting automotive in the future because of its lighter weight, higher strength and better performance compared with metallic materials. Combining the three-point bending experiment and finite element simulation method, the performance and failure mechanisms of CFRP tube filled aluminum honeycomb are carried out. The test results show that the peak load, absorbed energy and specific energy absorption (SEA) of the filled CFRP tube are increased by 17.09%, 32.31% and 0.9%, respectively, compared with the bare CFRP tube, and the failure mode is more stable. In addition, by the finite element simulation using Ls-dyna software, the failure mode and load-displacement curve agreed well with the physical experiments. It indicates that CFRP tube filled with lightweight aluminum honeycomb structure can effectively improve the lateral bending properties of bare CFRP structure, which is useful for the design of lightweight vehicle structure.

Key words: lightweight, aluminum honeycomb, CFRP, Ls-dyna, bending characteristics

中图分类号:

TB332

刘强, 莫正伟. 铝蜂窝填充CFRP结构的弯曲性能研究[J]. 玻璃钢/复合材料, 2016, 0(7): 48-52.

LIU Qiang, MO Zheng-wei. EXPERIMENTAL AND NUMERICAL INVESTIGATION OF THE BENDING CHARACTERISTICS OF CFRP SQUARE TUBE FILLED WITH ALUMINUM HONEYCOMB[J]. Fiber Reinforced Plastics/Composites, 2016, 0(7): 48-52.

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