碳纤维增强复合材料包裹强化形式对钢管横向冲击性能的影响

doi:10.13229/j.cnki.jdxbgxb20200939

摘要/Abstract

摘要：

针对碳纤维增强复合材料（CFRP）非全包裹可以在提高钢管性能的前提下实现进一步的轻量化，对CFRP强化钢管进行了横向冲击仿真研究，获得了CFRP包裹钢管的强化形式和尺寸对钢管横向冲击性能的影响规律。基于Hashin复合材料失效准则和Ductile金属失效准则，建立了CFRP全包裹钢管的落锤横向冲击仿真模型并验证模型的有效性。研究CFRP在钢管表面轴向粘贴、冲击侧环向粘贴和冲击侧背面环向粘贴时，CFRP粘贴尺寸与CFRP强化钢管抗冲击性能的关系。进行落锤横向冲击仿真，研究冲击作用下钢管损伤的分布规律，对比不同粘贴长度下强化钢管的最大位移和CFRP的吸能量。结果表明，增大CFRP轴向粘贴尺寸对钢管的强化作用更为明显；当环向全部粘贴、轴向粘贴长度为50%钢管跨距和轴向全部粘贴、环向粘贴长度为87.5%圆管外部周长时，CFRP强化钢管抗冲击性能与CFRP全包裹钢管基本一致。

关键词: 车辆工程, 碳纤维增强复合材料, 强化钢管, 抗冲击

Abstract:

In view of the fact that carbon fiber reinforced polymer（CFRP） partially wrapped steel tube can realize further lightweight on the premise of improving the performance of steel tube， the transverse impact simulation of CFRP reinforced steel tube was carried out， and the influence of strengthening form and size of CFRP wrapped steel tube on the transverse impact performance of steel tube was obtained. Based on the Hashin composite failure criterion and Ductile metal failure criterion， the simulation model of the drop hammer transverse impact of CFRP fully wrapped steel tube was established， and the validity of the model was verified. The relationship between the size of CFRP and the impact strength of steel tube was studied when CFRP was pasted axially on the steel tube surface， circumferentially on the impact side and circumferentially on the back of the impact side. The transverse impact simulation of drop hammer was carried out and the distribution of steel tube damage under impact was studied，the maximum displacement of the strengthened steel tube and the energy absorption of CFRP were compared under different bonding lengths. The results show that the strengthening influence of CFRP axial bonding size is more obvious；the impact resistance of the steel tube strengthened by CFRP is basically the same as that of the steel tube fully wrapped by CFRP， when the length of CFRP is pasted axially half of the span and the full length of the steel tube circumference or the length of CFRP is pasted axially 87.5% of the circumference and full length of span.

Key words: vehicle engineering, carbon fiber reinforced polymer, strengthened steel tube, impact resistance

中图分类号:

TB33

庄蔚敏,陈沈,吴迪. 碳纤维增强复合材料包裹强化形式对钢管横向冲击性能的影响[J]. 吉林大学学报(工学版), 2022, 52(4): 819-828.

Wei-min ZHUANG,Shen CHEN,Di WU. Influence of strengthening form of CFRP on transverse impact performance of steel tube[J]. Journal of Jilin University(Engineering and Technology Edition), 2022, 52(4): 819-828.

图/表 23

图1

图2

图3

图4

表1

钢管材料参数"

参数	数值
密度 $ρ / (k g ? m - 3)$	7850
弹性模量 $E / G P a$	210
泊松比 $υ$	0.3
屈服强度 $σ s / M P a$	317
拉伸强度 $σ b / M P a$	366

表1

表2

CFRP材料参数"

参数	数值
密度 $ρ / (k g ? m - 3)$	1500
纵向弹性模量 $E 1 / G P a$	75
横向弹性模量 $E 2 / G P a$	8.42
12方向剪切模量 $G 12 / G P a$	4.48
13方向剪切模量 $G 13 / G P a$	4.48
23方向剪切模量 $G 23 / G P a$	4
主泊松比 $υ 12$	0.307
纵向拉伸强度 $X t / M P a$	987
纵向压缩强度 $X c / M P a$	500
横向拉伸强度 $Y t / M P a$	42
横向压缩强度 $Y c / M P a$	172
剪切强度 $S 12 / M P a$	90

表2

表3

粘接剂材料参数"

参数	数值
密度 $ρ / (k g ? m - 3)$	1400
弹性模量 $E / G P a$	3
拉伸强度 $N m a x / M P a$	30
剪切强度 $S m a x 、 T m a x / M P a$	45

表3

图5

图6

表4

实验和仿真圆管截面尺寸对比"

截面尺寸	实验/mm	仿真/mm	误差/%
$d$	115.9	104.37	9.95
$d'$	80.0	80.13	0.16

表4

图7

图8

图9

图10

图11

图12

图13

图14

图15

图16

图17

图18

图19

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