泡沫填充类蜂窝夹层结构的耐撞性  

Crashworthiness of the foam-filled quasi-honeycomb sandwich structure

作　　者：李响[1,2] 曹祥斌 杨蔚华 李林 Li Xiang;Cao Xiangbin;Yang Weihua;Li Lin(Yichang Key Laboratory of Robot and Intelligent System, China Three Gorges University, Yichang 443002, China;College of Mechanical and Power Engineering, China Three Gorges University, Yichang 443002, China;Hubei Lidi Machine Tool Co., Ltd. ,Yichang 443005, China)

机构地区：[1]三峡大学机器人与智能系统宜昌市重点实验室,湖北宜昌443002 [2]三峡大学机械与动力学院,湖北宜昌443002 [3]湖北力帝机床股份有限公司,湖北宜昌443005

出　　处：《武汉科技大学学报》2021年第1期20-26,共7页Journal of Wuhan University of Science and Technology

基　　金：国家自然科学基金青年科学基金资助项目(51305232);湖北省教育厅科学技术研究计划重点资助项目(D20181206);三峡大学水电机械设备设计与维护重点实验室开放基金资助项目(2018KJX09);三峡大学研究生课程建设资助项目(SDKC201906);三峡大学硕士学位论文培优基金资助项目(2020SSPY034);三峡大学机器人与智能系统宜昌市重点实验室开放基金项目(JXYC00015).

摘　　要：本文创新构型一种聚氨酯泡沫填充类蜂窝夹芯结构,取类蜂窝胞元壁厚分别为0.3、0.5、1.0 mm,运用数值模拟方法对该填充结构在不同冲击速度作用下的耐撞性进行了系统研究,并分析了类蜂窝胞元壁厚对结构耐撞性及变形机制的影响。结果表明,在7、14、33 m/s冲击载荷作用下,类蜂窝胞元壁厚为0.3 mm填充结构的比吸能、载荷稳定性及吸能效率要高于其他两种壁厚结构的相应值,此条件下填充结构的耐撞性最优,胞元壁厚为0.5 mm结构的耐撞性次之。对于该泡沫填充类蜂窝结构而言,减小类蜂窝胞元壁厚能显著提升结构的载荷稳定性,在相同胞元壁厚条件下,填充结构在低速载荷冲击作用下表现出了比中、高速冲击作用下更优的载荷稳定性和吸能效率。In this paper,an innovative configuration of a polyurethane foam-filled quasi-honeycomb sandwich structure was proposed,and the applied wall thickness of the quasi-honeycomb cell was 0.3 mm,0.5 mm and 1.0 mm,respectively.The numerical simulation method was used to systematically study the crashworthiness of the foam-filled structures under different impact velocities,and the influence of the cell wall thickness on the crashworthiness and deformation mechanism of the quasi-honeycomb structure was analyzed.The results show that under the impact velocity of 7 m/s,14 m/s and 33 m/s,respectively,the specific energy-absorption,load stability,and energy absorption efficiency of the structure with the cell wall thickness of 0.3 mm are higher than those of the other two structures with the thickness of 0.5 mm and 1.0 mm.In other words,the foam-filled structure with the cell wall thickness of 0.3 mm has the best crashworthiness,followed by the structure with the cell wall thickness of 0.5 mm.For the quasi-honeycomb structure filled with foam,reducing the wall thickness of the quasi-honeycomb cell can significantly improve the load stability of the structure.Moreover,in the case of the same cell wall thickness,the foam-filled structure exhibits better load stability and energy absorption efficiency at low speed impact than at medium and high speed impacts.

关 键 词：类蜂窝结构 聚氨酯泡沫 泡沫填充 耐撞性 面内冲击 比吸能 有限元分析 

分 类 号：O347.3[理学—固体力学] TB333[理学—力学]