Energy-based strut stress analysis of 3D lattice cores in sandwich panels

被引:6
作者
Georges, H. [1 ,2 ]
Mittelstedt, C. [2 ]
Becker, W. [1 ]
机构
[1] Tech Univ Darmstadt, Inst Struct Mech, Franziska Braun Str 7, D-64287 Darmstadt, Germany
[2] Tech Univ Darmstadt, Inst Lightweight Engn & Struct Mech, Otto Berndt Str 2, D-64287 Darmstadt, Germany
关键词
Sandwich panels; 3D lattice core; Core design; Core modeling; Core indentation; Core failure; Localized load; OF-THE-ART; MECHANICAL-PROPERTIES; LAMINATED COMPOSITE; IMPACT RESPONSE; FAILURE; DESIGN; OPTIMIZATION; PLATE; PERFORMANCE; TRENDS;
D O I
10.1016/j.euromechsol.2023.105007
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
3D strut-based lattices consisting of periodic representative volume elements (RVE) have gained more importance over the last few years since they provide outstanding mechanical performance and an efficient design in lightweight engineering. In sandwich panels, strut-based lattices may replace the established honeycomb cores. In this study, an analytical model is introduced to investigate 3D strut-based lattice cores of sandwich panels. Body-centered cubic and face-centered cubic RVEs reinforced by vertical struts (BCCZ and F2CCZ) are considered as sandwich cores. Since the core stiffness is generally low in comparison with the face sheet stiffness, the derived model considers through the thickness stresses in the core caused by transverse concentrated loads, which are not obtained by the common sandwich theories. Furthermore, stress concentrations near the support points are sufficiently captured thanks to higher-order displacement representations. The analysis of the core behavior is based on the homogenization and dehomogenization of the lattice core methods. Compared with the finite element analysis, the stresses in the lattice struts are determined by the proposed model with ten times less computational effort and adequate accuracy, particularly in the highly loaded vertical struts.
引用
收藏
页数:13
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共 92 条
[31]   Experimental and Computational Investigation of Lattice Sandwich Structures Constructed by Additive Manufacturing Technologies [J].
Kladovasilakis, Nikolaos ;
Charalampous, Paschalis ;
Tsongas, Konstantinos ;
Kostavelis, Ioannis ;
Tzetzis, Dimitrios ;
Tzovaras, Dimitrios .
JOURNAL OF MANUFACTURING AND MATERIALS PROCESSING, 2021, 5 (03)
[32]   Development of lattice structure with selective laser melting process: A state of the art on properties, future trends and challenges [J].
Korkmaz, Mehmet Erdi ;
Gupta, Munish Kumar ;
Robak, Grzegorz ;
Moj, Kevin ;
Krolczyk, Grzegorz M. ;
Kuntoglu, Mustafa .
JOURNAL OF MANUFACTURING PROCESSES, 2022, 81 :1040-1063
[33]   Failure mode map for E-PBF manufactured Ti6Al4V sandwich panels [J].
Kotzem, D. ;
Tazerout, D. ;
Arold, T. ;
Niendorf, T. ;
Walther, F. .
ENGINEERING FAILURE ANALYSIS, 2021, 121
[34]   Evaluation of compressive properties of SLM-fabricated multi-layer lattice structures by experimental test and μ-CT-based finite element analysis [J].
Lei, Hongshuai ;
Li, Chuanlei ;
Meng, Jinxin ;
Zhou, Hao ;
Liu, Yabo ;
Zhang, Xiaoyu ;
Wang, Panding ;
Fang, Daining .
MATERIALS & DESIGN, 2019, 169
[35]   Design optimization of truss-cored sandwiches with homogenization [J].
Liu, T. ;
Deng, Z. C. ;
Lu, T. J. .
INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, 2006, 43 (25-26) :7891-7918
[36]   Mechanical performances of metal-polymer sandwich structures with 3D-printed lattice cores subjected to bending load [J].
Liu, Zhaobing ;
Chen, Hantang ;
Xing, Shuaiqi .
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING, 2020, 20 (03)
[37]   Mechanical and failure behaviors of lattice-plate hybrid structures [J].
Liu, Zhigang ;
Liu, Ping ;
Huang, Wei ;
Wong, Wei Hin ;
Commillus, Athanasius Louis ;
Zhang, Yong-Wei .
MRS COMMUNICATIONS, 2020, 10 (01) :42-54
[38]   A review of the recent trends on core structures and impact response of sandwich panels [J].
Ma, Quanjin ;
Rejab, M. R. M. ;
Siregar, J. P. ;
Guan, Zhongwei .
JOURNAL OF COMPOSITE MATERIALS, 2021, 55 (18) :2513-2555
[39]   SLM lattice structures: Properties, performance, applications and challenges [J].
Maconachie, Tobias ;
Leary, Martin ;
Lozanovski, Bill ;
Zhang, Xuezhe ;
Qian, Ma ;
Faruque, Omar ;
Brandt, Milan .
MATERIALS & DESIGN, 2019, 183
[40]   A new higher order shear deformation theory for sandwich and composite laminated plates [J].
Mantari, J. L. ;
Oktem, A. S. ;
Guedes Soares, C. .
COMPOSITES PART B-ENGINEERING, 2012, 43 (03) :1489-1499