格栅-蜂窝混式芯体夹芯结构的低速冲击性能  

Low-velocity impact performance of grid-honeycomb hybrid core sandwich structure

作　　者：张亚文 陈秉智[1] 石姗姗 毛海涛 ZHANG Yawen;CHEN Bingzhi;SHI Shanshan;MAO Haitao(College of Locomotive and Rolling stock Engineering,Dalian Jiaotong University,Dalian 116021,China;CRRC Qingdao Sifang Co.Ltd.,Qingdao 266109,China)

机构地区：[1]大连交通大学机车车辆工程学院,大连116021 [2]中国中车青岛四方机车车辆股份有限公司,青岛266109

出　　处：《复合材料学报》2022年第1期381-389,共9页Acta Materiae Compositae Sinica

基　　金：大连市青年科技之星项目支持计划(2019RQ045);辽宁省教育厅科学研究经费项目(JDL2020021);中国国家铁路集团有限公司科技研究开发计划(N2020J027);大连市科技创新基金计划(2019J11CY017)。

摘　　要：针对传统复合材料夹芯结构抗冲击性能差的缺陷,提出一种格栅-蜂窝混式芯体,并对其低速冲击性能进行了研究。采用半球头式落锤冲击实验平台对碳纤维铝蜂窝夹芯结构的低速冲击响应进行研究;其次基于蜂窝非线性本构与完美界面假设,建立了碳纤维铝蜂窝夹芯板低速冲击仿真模型,实验与仿真结果吻合良好;最后对不同冲击位置和冲击角度下格栅-蜂窝混式芯体夹芯板的破坏模态及力学响应进行研究。结果表明:不同冲击位置及不同角度冲击下结构损伤模态及吸能模式存在巨大差异;格栅-蜂窝混式芯体可以显著提高结构的抗低速冲击性能,对于冲击损伤具有良好的限制作用。A grid-honeycomb hybrid core was proposed and investigated to address the disadvantage of poor impact resistance of traditional composite sandwich structures.The impact test system of hemisphere-head drop hammer was used to study the low-speed impact response of the carbon fiber aluminum honeycomb sandwich structure.Based on the nonlinear constitutive and perfect interface assumption,the low-speed impact simulation model of the carbon fiber aluminum honeycomb sandwich panel was established and investigated.Research shows that the experimental and simulation results are in good agreement.Finally,the failure mode and mechanical response of grid-reinforced honeycomb hybrid core sandwich panels under different impact positions and impact angles were studied.The results show that there are huge differences in structural damage modes and energy absorption modes under different impact positions and different impact angles.The grid-honeycomb hybrid core can significantly improve the low-speed impact resistance of the structure,and has a good limiting effect on impact damage.

关 键 词：复合材料夹芯结构 低速冲击 混式芯体 力学响应 吸能模式 

分 类 号：TB332[一般工业技术—材料科学与工程]