Low velocity impact resistance of thermoplastic fiber reinforced metal laminates

doi:10.3969/j.issn.1674-8484.2022.03.002

Abstract

Abstract:

The low-velocity impact resistance of thermo-plastic fiber metal laminates (TFMLs) was investigated to provide references for the actual structural design. Some thermoplastic fiber metal laminates (TFMLs)-3/2 were prepared by using 2024-T3 aluminum alloy, continuous glass fiber reinforced modified polyamide 6 unidirectional tape and polyethylene film. Some 122 J drop weight low-speed impact tests were carried out on the samples with different layup angles. Based on the dynamic analysis software LS-DYNA, a finite element simulation model of TFMLs low-speed impact was established, and the comparison error between simulation and test results was controlled within 10%. The results show that the unidirectional layup samples have brittle fracture, and the orthogonal layup samples only have plastic deformation without cracks; And the shape of the impactor and the angle of fiber layup have an important influence on the low-speed impact response of TFMLs; And the peak impact force of the pointed impactor is 46.5% lower than that of the flat impact. The internal damage area is the smallest in the orthogonal layup, which is 53.5% lower than that of the oblique layup.

Key words: structural design, thermoplastic fiber reinforced metal laminates (TFMLs), low velocity impact, finite element analysis, impact response

CLC Number:

TB333
O 341

QI Chang, FU Lirong, SUN Yong, WEI Wentao, YANG Shu. Low velocity impact resistance of thermoplastic fiber reinforced metal laminates[J]. Journal of Automotive Safety and Energy, 2022, 13(3): 421-428.

Figures/Tables 17

References 19

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密度,ρ	2.77 g/cm³
初试屈服应力,σ₀	369 MPa
应变变化幂指数,N	0.730
应变速率常数,C	0.008 30
应变率归一化因子,EPSO	0.001 00

密度,ρ	2.77 g/cm³
初试屈服应力,σ₀	369 MPa
应变变化幂指数,N	0.730
应变速率常数,C	0.008 30
应变率归一化因子,EPSO	0.001 00

密度, ρ	1.72 g/cm³
Poisson比, μ₁₂	0.33
剪切模量	5.6 GPa
纤维方向弹性模量	19.7 GPa
基体方向弹性模量	8.5 GPa
纤维方向压缩强度	329 MPa
纤维方向拉伸强度	929 MPa
基体方向压缩强度	285 MPa
基体方向拉伸强度	26 MPa
剪切强度	73 MPa

密度, ρ	1.72 g/cm³
Poisson比, μ₁₂	0.33
剪切模量	5.6 GPa
纤维方向弹性模量	19.7 GPa
基体方向弹性模量	8.5 GPa
纤维方向压缩强度	329 MPa
纤维方向拉伸强度	929 MPa
基体方向压缩强度	285 MPa
基体方向拉伸强度	26 MPa
剪切强度	73 MPa

	单向铺层			正交铺层
	f_max kN	t_max ms	Δt ms	f_max kN	t_max ms	Δt ms
试验	14.48	6.15	23.69	28.98	9.14	14.57
仿真	15.46	5.49	22.63	29.04	7.96	13.31
误差 / %	6.8	10.7	4.5	0.2	12.9	8.6