摘要
Nomex蜂窝夹芯结构的抗平头冲击性能常见于高速高能冲击下的弹道特性研究,且多为冲头与板面垂直的形式,而不是更为常见的斜冲击。为研究铝面板Nomex蜂窝结构低速抗平头冲击性能,采用ABAQUS建立了Nomex蜂窝夹芯结构的精细化模型,搭建半球头低速冲击试验平台进行冲击试验,通过冲击力-时间曲线和冲头速度-时间曲线对比验证了仿真模型的准确性。仿真计算了该结构在0°、15°、30°和45°平头冲击下的损伤形貌、力学响应和能量吸收情况。结果表明斜冲击时随着平头冲击角度增大,Nomex蜂窝夹芯面板最大凹深减小,水平滑移距离增大但脱黏面积几乎不变;冲击角度从0°增大到45°,接触时间增大34.88%,冲击接触力峰值下降12.79%,蜂窝芯吸能减少63.28%。
The anti-flat punch impact performance of Nomex honeycomb sandwich structure is studied on the ballistic characteristics under high-speed or high-energy impact,and it is mostly in the form of the punch perpendicular to the plate surface,rather than the common oblique impact.In order to study the low-speed flat-head impact resistance of the aluminum panel Nomex honeycomb structure,a detailed model of the Nomex honeycomb sandwich structure was established in ABAQUS.A hemispherical head low-velocity impact test platform was built for impact test.The accuracy of the simulation model was verified by comparing the impact force-time curve and punch velocity-time curve.The damage morphology,mechanical response and energy absorption of the structure under 0°,15°,30° and 45° flat head impact were discussed by simulation.The results show that as the impact angle increases during oblique impact,the maximum concave depth of the surface decreases,and the horizontal slip distance increases but the debonding area is the same.The impact angle increases from 0° to 45°,the contact time increases by 34.88%,and the peak contact force drops by 12.79%,and the honeycomb wicking can be reduced by 63.28%.
作者
黄贵宾
段玥晨
谢鑫
HUANG Gui-bin;DUAN Yue-chen;XIE Xin(School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China)
出处
《复合材料科学与工程》
CAS
北大核心
2022年第10期25-32,共8页
Composites Science and Engineering
基金
国家自然科学基金项目(11402234,U1833116)
河南省高等学校重点科研项目(16A130005)。
关键词
NOMEX蜂窝
低速平头冲击
精细模型
斜冲击
Nomex honeycomb
low speed flat head impact
detailed model
oblique impact
