基于等刚度原理的碳纤维汽车B柱抗撞性分析
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摘要
采用吸能比更高的碳纤维增强复合材料(CFRP)替代原有金属汽车B柱是实现整车轻量化的有益探索。基于等刚度原理设计碳纤维增强复合材料汽车B柱,建立B柱与移动柱的有限元碰撞模型,对比分析移动柱在7. 2 km/h冲击速度下撞击B柱不同部位处的侵入量以及侵入速度的差异性。结果表明:与原高强度钢B柱相比,碳纤维复合材料B柱在低速冲击时变形更小,能量吸收性能更好,具有更好的抗撞性;同时相对于高强钢B柱质量减小了26. 27%,更好地满足了汽车B柱轻量化的要求。
The use of carbon fiber reinforced composites( CFRP) with higher energy absorption ratio to replace the original metal automobile B-pillar is a useful exploration to realize the lightweight of the whole vehicle,and is of great significance for the replacement of automobile structural parts. The carbon fiber reinforced composite material B-pillar was designed based on the principle of equal stiffness,and the finite element collision model of B-pillar and moving column was established. By comparing and analyzing the intrusion amount and the intrusion speed difference of the moving column at different impact points of the B-pillar at the impact velocity of 7. 2 km/h. The results show that compared with the original high-strength steel B-pillar,the carbon fiber composite B-pillar has less deformation at low speed impact,more energy absorption and better crashworthiness. At the same time,compared with the high-strength steel B-pillar,a mass reduction of 26. 27% is realized,which could better meet the automotive Bpillar lightweight requirements.
The use of carbon fiber reinforced composites( CFRP) with higher energy absorption ratio to replace the original metal automobile B-pillar is a useful exploration to realize the lightweight of the whole vehicle,and is of great significance for the replacement of automobile structural parts. The carbon fiber reinforced composite material B-pillar was designed based on the principle of equal stiffness,and the finite element collision model of B-pillar and moving column was established. By comparing and analyzing the intrusion amount and the intrusion speed difference of the moving column at different impact points of the B-pillar at the impact velocity of 7. 2 km/h. The results show that compared with the original high-strength steel B-pillar,the carbon fiber composite B-pillar has less deformation at low speed impact,more energy absorption and better crashworthiness. At the same time,compared with the high-strength steel B-pillar,a mass reduction of 26. 27% is realized,which could better meet the automotive Bpillar lightweight requirements.
引文
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[14]赵娣,陈晓磊.汽车B柱轻量化设计及碰撞分析[J].上海汽车,2014(1):25-27.
[15]陈伟,朱小镇.碳纤维复合材料汽车B柱中部支撑板设计与分析[J].汽车材料与涂装,2018(15):221-223.
[2]钭李昕.碳纤维复合材料赛车车身覆盖件设计及原型制作[D].杭州:浙江工业大学,2016.
[3]李贝.纤维增强型复合材料保险杠轻量化设计与优化[D].长沙:湖南大学,2016.
[4]丁小马.碳纤维复合材料汽车前地板成型工艺及性能研究[D].上海:东华大学,2015.
[5]Castanos A,Mills A. Analysis of multicell braided composite joints[C]//Future Car Congress. 2002:109-114(6).
[6]Koricho E G,Belingardi G. An experimental and finite element study of the transverse bending behaviour of CFRP composite T-joints in vehicle structures[J]. Composites Part B,2015,79(1):430-443.
[7]Lescheticky J,Barnes G,Schrank M. System level design simulation to predict passive safety performance for CFRP automotive structures[C]//SAE 2013 World Congress. 2013.
[8]高翔,范体强,赵清江,等.基于有限元分析的高强钢B柱零件的应用研究[J].汽车工艺与材料,2014(9):10-14.
[9]郭永奇,黄小征,王帅,等.基于等刚度原理的碳纤维发动机罩开发[J].汽车实用技术,2017(19):100-103.
[10]郭炳斌,陈良斌,成强.复合材料等效模量的计算[J].科技创新导报,2014(16):195-195.
[11]徐娟.碳纤维复合材料发动机罩轻量化设计研究[J].上海汽车,2015(3):54-56.
[12]雷刚,刘意,徐杰,等.轿车侧门碰撞强度仿真分析及优化[J].机械设计与制造,2011(4):194-196.
[13]高哲,蒋高明.多轴向经编曲面复合材料汽车门低速碰撞数值模拟[J].纺织学报,2018(2):43-48.
[14]赵娣,陈晓磊.汽车B柱轻量化设计及碰撞分析[J].上海汽车,2014(1):25-27.
[15]陈伟,朱小镇.碳纤维复合材料汽车B柱中部支撑板设计与分析[J].汽车材料与涂装,2018(15):221-223.