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Mechanical behaviors of SLM additive manufactured octet-truss and truncated-octahedron lattice structures with uniform and taper beams

文献类型：期刊论文

作者Qi DX4; Yu HB4; Liu M4; Huang H3; Xu SC3; Xia Y3; Qian GA(钱桂安)2; Wu WW1,4
刊名INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
出版日期2019-11-01
卷号163页码:16
ISSN号0020-7403
关键词Lattice structures Homogenization theory Mechanical properties SLM additive manufacturing
DOI10.1016/j.ijmecsci.2019.105091
通讯作者Qian, Guian(qianguian@imech.ac.cn) ; Wu, Wenwang(wuww05@mit.edu)
英文摘要In this paper, three-dimensional lattice structures composed of octet-truss and truncated-octahedron unit cells with regular and tapered beams are proposed, and their mechanical properties are investigated through experiments and simulation comparisons. Firstly, analytical closed form expressions of the relative density functions are derived for different lattice structures. Secondly, in-situ compression samples are fabricated via Selective Laser Melting (SLM) 3D printing technique, monotonic compression experiments are performed for studying the effects of tapered beams on the mechanical properties of lattice structures with ordinary uniform beams, and SEM characterizations of fracture surface morphology are performed for understanding the underlying failure mechanisms. Afterwards, asymptotic homogenization (AH) method is used for evaluating the anisotropy properties of these lattice structures, closed form expression of the mechanical behaviors of unit cells is derived and solved with ABAQUS (R) using surface traction method. Asymptotic homogenization analysis shows that node enforcement can significantly enhance the modulus and reduce the anisotropy of the lattice.
分类号一类
WOS关键词ASYMPTOTIC HOMOGENIZATION ; FINITE-ELEMENT ; COMPRESSION BEHAVIOR ; SANDWICH STRUCTURES ; ENERGY-ABSORPTION ; REENTRANT ; STIFFNESS ; METAMATERIALS ; DESIGN ; IMPACT
资助项目National Natural Science Foundation of China[11702023] ; National Natural Science Foundation of China[11632010] ; National Natural Science Foundation of China[11972081] ; State Key Laboratory of Automotive Safety and Energy[KF1808] ; State Key Laboratory of Automotive Safety and Energy[KF1810]
WOS研究方向Engineering ; Mechanics
语种英语
WOS记录号WOS:000496866200001
资助机构National Natural Science Foundation of China ; State Key Laboratory of Automotive Safety and Energy
其他责任者Qian, Guian ; Wu, Wenwang
源URL[http://dspace.imech.ac.cn/handle/311007/81198]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.MIT, Dept Mech Engn, Cambridge, MA 02139 USA
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
3.Tsinghua Univ, State Key Lab Automot Safety & Energy, Beijing 100084, Peoples R China;
4.Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China;
推荐引用方式
GB/T 7714		 Qi DX,Yu HB,Liu M,et al. Mechanical behaviors of SLM additive manufactured octet-truss and truncated-octahedron lattice structures with uniform and taper beams[J]. INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES,2019,163:16.
APA Qi DX.,Yu HB.,Liu M.,Huang H.,Xu SC.,...&Wu WW.(2019).Mechanical behaviors of SLM additive manufactured octet-truss and truncated-octahedron lattice structures with uniform and taper beams.INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES,163,16.
MLA Qi DX,et al."Mechanical behaviors of SLM additive manufactured octet-truss and truncated-octahedron lattice structures with uniform and taper beams".INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES 163(2019):16.

入库方式： OAI收割

来源：力学研究所

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