仿生BCC结构的准静态压缩数值模拟及吸能性  

Numerical Simulation of Quasi-Static Compression and Energy Absorption of Bionic BCC Structure

作　　者：吴伟 张辉 曹美文 张霞 陈飞 梁清香 常超 WU Wei;ZHANG Hui;CAO Meiwen;ZHANG Xia;CHEN Fei;LIANG Qingxiang;CHANG Chao(Department of Mechanics,College of Applied Science,Taiyuan University of Science and Technology,Taiyuan 030008,Shanxi,China;Shanxi Diesel Engine Industry Co.,Ltd.,Datong 037036,Shanxi,China)

机构地区：[1]太原科技大学应用科学学院力学系,山西太原030008 [2]山西柴油机工业有限责任公司,山西大同037036

出　　处：《高压物理学报》2020年第6期26-33,共8页Chinese Journal of High Pressure Physics

基　　金：山西省高等学校科技创新项目(2019L0624)。

摘　　要：晶格点阵结构因具有质量轻、吸能性好等优点,被广泛应用于航空、航天、军工等领域。研究了仿生体心立方(BCC)结构的吸能性,并探讨了截面形貌对BCC晶格结构吸能性的影响。基于毛竹的宏观结构和细观结构,设计了3种不同的BCC仿竹晶格点阵结构,对3种结构及原始BCC晶格结构进行了轴向准静态压缩数值模拟。结果表明:静载下仿竹BCC结构的吸能性和比吸能均比原始BCC结构提高了25%以上,但3种仿竹BCC结构的吸能性、比吸能相差不大;仿竹BCC结构的相对密度对其吸能性和比吸能的影响较大;在压缩过程中,仿生结构的韧性截面有效保证了塌陷稳定性,这是该结构吸能稳定的重要原因。The lattice structure is widely used in aerospace,military,and other fields due to its lightweight and excellent energy absorption.This article mainly studies the energy absorption of the bionic BCC(bodycentered cubic)structure and discusses its influence by the cross-sectional morphology.In this paper,three different BCC bionic bamboo lattice structures are designed based on the macro-structure and meso-structure of Phyllostachys pubescens.Additionally,the axial compression numerical simulation is carried out on the bionic bamboo lattice structures and original BCC lattice structure,respectively.The results show that both the energy absorption and specific energy absorption of the bionic bamboo lattice structures under quasistatic load are improved by more than 25%compared with the original BCC structure.However,the energy absorption and specific energy absorption of the three bionic bamboo lattice structures are similar.It is also indicated that the relative density of the structure has great influence on its energy absorption and specific energy absorption.During the compression process of the bionic BCC structure,there are wrinkles and collapses inside,which might be an important reason for the stable energy absorption of the bionic structure.

关 键 词：仿竹结构 体心立方晶格结构 能量吸收 数值模拟 

分 类 号：O341[理学—固体力学]