Experiment and Application Research of Arc Side Structure with Negative Poisson's Ratio
-
摘要: 以某弧边负泊松比结构为研究对象, 进行静态压缩试验, 对比分析试验与仿真的变形及载荷数据, 试验与仿真承载力峰值误差小, 整体变形形式一致, 模型可靠。基于该结构建立填充芯, 填充于某小型电动汽车前端结构, 进行正面碰撞应用研究。通过B柱加速度、吸能量、前端压溃量、驾驶室侵入量等参数对比分析该负泊松比结构在纵梁前端、后端两种填充方式的差异; 比较其与传统结构在后填充方式下耐碰撞效果的优劣。结果表明, 纵梁后填充方式较前填充方式具有更加优越的耐撞应用效果, 弧边负泊松比结构后端填充后, 较传统结构可以在得到较低的加速度峰值的同时具有更少的驾驶室侵入量。Abstract: Taking an arc-side negative Poisson's ratio structure as the research object, the static compression was completed, the deformation and load data of the analysis test and simulation were compared. The peak error of the test and simulation bearing capacity was small, the overall deformation form was basically the same, and the model is reliable. Based on this structure, a filling core was established and filled in the front-end structure of a small electric vehicle for frontal collision application research. The difference between the two filling methods of the negative Poisson's ratio structure at the front end and the rear end of the longitudinal beam was analyzed by comparing the parameters of B-pillar acceleration, energy absorption, front-end collapse, and cab intrusion, and the traditional structure in the post-filling mode, the advantages and disadvantages of the impact resistance effect were compared. The results show that the rear filling method of the longitudinal beams has a superior impact resistance application effect than the front filling method. After the rear end of the arc-edge negative Poisson's ratio structure is filled, it can obtain lower acceleration peaks and less room invasion volume than the traditional structure.
-
表 1 填充芯数据
填充芯方式 长/mm 宽/mm 高/mm 弧边填充芯 282.09 55.636 55.636 传统结构填充芯 277.20 54.043 54.043 表 2 吸能数据
能量 前填充 后填充 传统结构 填充芯吸能量/kJ 0.468 1.325 0.463 填充芯比吸能/(kJ·kg-1) 0.633 1.793 0.768 表 3 前端碰撞数据
名称 未填充 前填充 后填充 传统结构 前端压溃量/mm 301.317 309.154 310.626 309.617 驾驶室侵入量/mm 25.594 21.271 20.071 22.736 -
[1] 杨智春, 邓庆田. 负泊松比材料与结构的力学性能研究及应用[J]. 力学进展, 2011, 41(3): 335-350 https://www.cnki.com.cn/Article/CJFDTOTAL-LXJZ201103007.htmYANG Z C, DENG Q T. Mechanical property and application of materials and structures with negative Poisson's ratio[J]. Advances in Mechanics, 2011, 41(3): 335-350 (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-LXJZ201103007.htm [2] 于靖军, 谢岩, 裴旭. 负泊松比超材料研究进展[J]. 机械工程学报, 2018, 54(13): 1-14 https://www.cnki.com.cn/Article/CJFDTOTAL-JXXB201813001.htmYU J J, XIE Y, PEI X. State-of-art of metamaterials with negative Poisson's ratio[J]. Journal of Mechanical Engineering, 2018, 54(13): 1-14 (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-JXXB201813001.htm [3] 岑神德. 一种新型负泊松比蜂窝结构的冲击动力学研究[D]. 广州: 暨南大学, 2018CEN S D. Study on impact dynamics of a new auxetic honeycomb structure[D]. Guangzhou: Jinan University, 2018 (in Chinese) [4] QIANG G C, GAO Q, WANG L M. Dynamic crushing behaviors of four kinds of auxetic structures[R]. SAE Technical Paper, 2019 [5] WANG C Y, WANG W W, ZHAO W Z, et al. Reliability optimization of a novel negative Poisson's ratio forepart for pedestrian protection[J]. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2018, 232(17): 2998-3012 doi: 10.1177/0954406217730441 [6] 周冠. 新型负泊松比结构关键技术研究及其在车身设计中的应用[D]. 长沙: 湖南大学, 2015: 91-94ZHOU G. Study on key techniques of NPR structure and its application in vehicle body design[D]. Changsha: Hunan University, 2015: 91-94 (in Chinese) [7] 刘宇, 郝琪, 田钰楠, 等. 负泊松比基元蜂窝结构研究[J]. 机械科学与技术, 2021, 40(10): 1629-1635 doi: 10.13433/j.cnki.1003-8728.20200237LIU Y, HAO Q, TIAN Y N, et al. Study on honeycomb structure of negative Poisson's ratio element[J]. Mechanical Science and Technology for Aerospace Engineering, 2021, 40(10): 1629-1635 (in Chinese) doi: 10.13433/j.cnki.1003-8728.20200237 [8] LI C, SHEN H S, WANG H. Nonlinear dynamic response of sandwich beams with functionally graded negative Poisson's ratio honeycomb core[J]. The European Physical Journal Plus, 2019, 134(2): 79 doi: 10.1140/epjp/i2019-12572-7 [9] QIN H X, YANG D Q. Vibration reduction design method of metamaterials with negative Poisson's ratio[J]. Journal of Materials Science, 2019, 54(22): 14038-14054 doi: 10.1007/s10853-019-03903-z [10] TAN H L, HE Z C, LI K X, et al. In-plane crashworthiness of re-entrant hierarchical honeycombs with negative Poisson's ratio[J]. Composite Structures, 2019, 229: 111415 doi: 10.1016/j.compstruct.2019.111415 [11] 崔世堂, 王波, 张科. 负泊松比蜂窝面内动态压缩行为与吸能特性研究[J]. 应用力学学报, 2017, 34(5): 919-924 https://www.cnki.com.cn/Article/CJFDTOTAL-YYLX201705018.htmCUI S T, WANG B, ZHANG K. Mechanical behavior and energy absorption of honeycomb with negative Poisson's ratio under in-plane dynamic compression[J]. Chinese Journal of Applied Mechanics, 2017, 34(5): 919-924 (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-YYLX201705018.htm [12] 张新春, 祝晓燕, 李娜. 六韧带手性蜂窝结构的动力学响应特性研究[J]. 振动与冲击, 2016, 35(8): 1-7+26 https://www.cnki.com.cn/Article/CJFDTOTAL-ZDCJ201608001.htmZHANG X C, ZHU X Y, LI N. A study of the dynamic response characteristics of hexagonal chiral honeycombs[J]. Journal of Vibration and Shock, 2016, 35(8): 1-7+26 (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-ZDCJ201608001.htm [13] 郝琪, 刘卫斌, 肖琪, 等. 小型纯电动汽车正面碰撞分析[J]. 汽车技术, 2019(9): 58-62 https://www.cnki.com.cn/Article/CJFDTOTAL-QCJS201909014.htmHAO Q, LIU W B, XIAO Q, et al. Analysis of frontal impact of a mini battery electric vehicle[J]. Automobile Technology, 2019(9): 58-62 (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-QCJS201909014.htm [14] WANG C Y, ZOU S C, ZHAO W Z. Multi-objective optimization of a novel crash box with a three-dimensional negative Poisson's ratio inner core[J]. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 2019, 233(2): 263-275 [15] 王国春, 成艾国, 高晖, 等. 材料应变率对汽车碰撞性能影响的研究[J]. 汽车工程, 2010, 32(6): 482-485 https://www.cnki.com.cn/Article/CJFDTOTAL-QCGC201006004.htmWANG G C, CHENG A G, GAO H, et al. A study on the effects of strain rate on the crashworthiness of vehicle[J]. Automotive Engineering, 2010, 32(6): 482-485 (in Chinese) https://www.cnki.com.cn/Article/CJFDTOTAL-QCGC201006004.htm