摘要
为了研究冲击角度对铝蜂窝夹芯板低速冲击性能的影响,在ABAQUS中参照文献试验过程建立了铝蜂窝夹芯板受低速冲击的有限元模型,将仿真结果与文献试验结果进行对比以验证模型的可靠性,并进一步利用该模型研究了冲击角度对铝蜂窝夹芯板损伤、吸能、接触力峰值和接触时间以及切向滑移粘滞状态的影响。增大冲击角度发现:①铝蜂窝夹芯板的最大损伤深度减小,上蒙皮变形减小,沿着冲头滑动方向的蜂窝芯单元屈曲增多,但损伤减轻,下蒙皮几乎没有变形;②接触力峰值减小,接触时间增大;③铝蜂窝夹芯板吸能减小,其各部件吸能也分别缓慢减小,但始终保持上蒙皮大于蜂窝芯大于下蒙皮的趋势;④滑移时间增大,粘滞时间先减小后增大,粘滞时间占比先减小后快速增大,并在45°时粘滞时间占比最小。
In order to study the effect of impact angle on the low-velocity impact performance of aluminum honeycomb sandwich plate,a finite element model of aluminum honeycomb sandwich plate subjected to low-velocity impact was established in ABAQUS with reference to the literature experiment process.The simulation results were compared with the literature experiment results to verify the reliability of the model.The effects of impact angle on damage and energy absorption of sandwich plate,maximum contact force and contact time between impactor and top face-sheet,the tangential slip-stick state between impactor and top face-sheet were investigated.The results show that with the increase of impact angle,the maximum damage depth of the aluminum honeycomb sandwich plate decreases,the deformation of the top face-sheet decreases,and the buckling of the honeycomb core element along the sliding direction of the impactor increases.But its damage decreases,and the bottom face-sheet almost not deforms.Besides,the maximum contact force decreases,the contact time between impactor and top face-sheet increases.Also,the absorbed energy by total sandwich plate decreases,absorbed energy by every component of plate decreases slowly.But the trend that top face-sheet is larger than honeycomb core than bottom face-sheet is always maintained.In addition,the slip time increases,the stick time decreases first and then increases.The proportion of stick time decreases first and then increases rapidly,and the proportion of stick time is the smallest at 45°.
作者
谢鑫
段玥晨
齐佳旗
XIE Xin;DUAN Yue-chen;QI Jia-qi(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
2020年第4期19-27,共9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
铝蜂窝夹芯板
低速冲击
冲击角度
滑移
粘滞
复合材料
aluminum honeycomb sandwich plate
low-velocity impact
impact angle
slip
stick
composite
