Ultralight X-type lattice sandwich structure (Ⅱ):Micromechanics modeling and finite element analysis  

作　　者：ZHANG QianCheng1,CHEN AiPing 2,CHEN ChangQing2,3 & LU TianJian2 1 State Key Laboratory for Mechanical Behavior of Materials,School of Material Science and Engineering,Xi’an Jiaotong University,Xi’an 710049,China 2 MOE Key Laboratory for Strength and Vibration,School of Aerospace,Xi’an Jiaotong University,Xi’an 710049,China 3 Department of Engineering Mechanics,AML,Tsinghua University,Beijing 100084,China 

出　　处：《Science China(Technological Sciences)》2009年第9期2670-2680,共11页中国科学（技术科学英文版）

基　　金：Supported by the National Basic Research Program of China ("973" Project) (Grant No. 2006CB601202);the National Natural Science Foundation of China (Grant Nos. 10632060, 10825210);the National "111" Project of China (Grant No. B06024);the National High-Tech Research and Development Program of China ("863" Project) (Grant No. 2006AA03Z519)

摘　　要：The methods of homogenization and finite elements are employed to predict the effective elastic constants and stress-strain responses of a new type of lattice structure,the X-structure proposed by the authors in a companion paper. It is shown that in most cases the predictions by the equivalent homogenization theory agree well with the experimental and 3-dimensional finite element calculated results. The theoretical and numerical study supports the argument that the X-structure is superior to the pyramid lattice structure in terms of mechanical strength.The methods of homogenization and finite elements are employed to predict the effective elastic constants and stress-strain responses of a new type of lattice structure,the X-structure proposed by the authors in a companion paper. It is shown that in most cases the predictions by the equivalent homogenization theory agree well with the experimental and 3-dimensional finite element calculated results. The theoretical and numerical study supports the argument that the X-structure is superior to the pyramid lattice structure in terms of mechanical strength.

关 键 词：SANDWICH PANEL LATTICE structure EQUIVALENT HOMOGENIZATION FINITE element model 

分 类 号：O342[理学—固体力学]