热塑性纤维金属层板的抗低速冲击性能

Low velocity impact resistance of thermoplastic fiber reinforced metal laminates

研究热塑性纤维金属层板(TFMLs)抗低速冲击性能,可为实际结构设计提供参考。采用2024-T3铝合金、连续玻璃纤维增强改性聚酰胺6单向带和聚乙烯胶膜制备TFMLs3/2。对不同铺层角度样件进行122 J落锤低速冲击试验。基于动力学分析软件LS-DYNA建立TFMLs低速冲击有限元仿真模型,仿真与试验结果对比误差控制在10%以内。结果表明:单向铺层样件出现脆性断裂,正交铺层样件仅发生塑性变形,未产生裂纹;冲击器形状与纤维铺层角度对TFMLs低速冲击响应有重要影响;尖头冲击器冲击时碰撞峰值力相较于平头冲击降低46.5%。正交铺层时内部损伤面积最小,相较于斜向铺层降低53.5%。

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)-3/2were prepared by using 2024-T3 aluminum alloy,continuous glass fiber reinforced modified polyamide 6unidirectional 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.