正弦曲边负泊松比蜂窝结构面内冲击性能研究  

In plane impact performance of honeycomb structure with sinusoidal curved edge and negative Poisson’s ratio YU Kejiong1,2,XU Fengxiang1,2,HUA Lin1,2

作　　者：虞科炯 徐峰祥[1,2] 华林[1,2] YU Kejiong;XU Fengxiang;HUA Lin(Hubei Provincial Key Lab of Advanced Technology of Automotive Components,Wuhan University of Technology,Wuhan 430070,China;Hubei Provincial Collaborative Innovation Center for Automotive Components Technology,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学现代汽车零部件技术湖北省重点实验室,武汉430070 [2]武汉理工大学汽车零部件技术湖北省协同创新中心,武汉430070

出　　处：《振动与冲击》2021年第13期51-59,共9页Journal of Vibration and Shock

基　　金：国家自然科学基金(51975438);高等学校学科创新引智计划(B17034)。

摘　　要：提出了一种引入正弦函数曲线的负泊松比蜂窝结构,通过改变振幅、胞壁厚度等微结构几何参数,建立了参数化的正弦曲线负泊松比蜂窝结构模型。研究了冲击速度和微结构几何参数对正弦曲线蜂窝结构面内冲击变形模式、动态响应和吸能特性的影响。研究表明:正弦曲线负泊松比蜂窝结构的面内冲击性能主要与其振幅、壁厚以及冲击速度有关。中低速冲击时,振幅越大,胞壁越厚,结构面内变形越均匀。随着冲击速度的提高,增大振幅、壁厚均可一定程度增加冲击端的平台应力。对结构吸能特性的分析表明,振幅较小的正弦曲线负泊松比蜂窝结构具有更强的能量吸收能力,相对于内凹六边形蜂窝结构,能够显著降低峰值冲击力。Here,a negative Poisson’s ratio honeycomb structure with sinusoidal function curve was proposed.By changing amplitude,cell wall thickness and other microstructure geometric parameters,a parametric sinusoidal negative Poisson’s ratio honeycomb structure model was established.Effects of impact velocity and microstructure geometric parameters on in-plane impact deformation mode,dynamic response and energy absorption characteristics of the sinusoidal honeycomb structure were studied.The study results showed that in-plane impact performance of honeycomb structure with sinusoidal negative Poisson’s ratio is mainly related to its amplitude,wall thickness and impact velocity;during impacting with medium-low speed,the larger the amplitude,the thicker the cell wall,the more uniform the deformation in structural plane;with increase in impact velocity,increasing amplitude and wall thickness can increase platform stress at impact end to a certain extent;the sinusoidal negative Poisson honeycomb structure with smaller amplitude has stronger energy absorption capacity,it can significantly reduce peak impact force compared with concave hexagonal honeycomb structure.

关 键 词：负泊松比(NPR) 正弦曲线 面内冲击 微结构参数 能量吸收 

分 类 号：TH212[机械工程—机械制造及自动化] TH213.3