Mechanical Performance Comparison of Sandwich Panels with Graded Lattice and Honeycomb Cores

被引：3

作者：

Georges, Hussam ^{[1
]}

Garcia Solera, Diego ^{[1
]}

Aguilar Borasteros, Carlos ^{[1
]}

Metar, Mohmad ^{[1
]}

Song, Gyeongseob ^{[1
]}

Mandava, Rahul ^{[1
]}

Becker, Wilfried ^{[2
]}

Mittelstedt, Christian ^{[1
]}

机构：

[1] Tech Univ Darmstadt, Inst Lightweight Engn & Struct Mech, Dept Mech Engn, Otto Berndt Str 2, D-64287 Darmstadt, Germany

[2] Tech Univ Darmstadt, Inst Struct Mech, Franziska Braun Str 7, D-64287 Darmstadt, Germany

来源：

BIOMIMETICS | 2024年 / 9卷 / 02期

基金：

英国科研创新办公室;

关键词：

sandwich panels; 3D lattice core; honeycomb core; fully stressed design; graded core; design for additive manufacturing; DESIGN; IMPACT; PLATES;

D O I：

10.3390/biomimetics9020096

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The design of graded and multifunctional lattice cores is driven by the increasing demand for high-performance components in lightweight engineering. This trend benefits from significant achievements in additive manufacturing, where the lattice core and the face sheets are fabricated simultaneously in a single print job. This work systematically compares the mechanical performance of sandwich panels comprising various graded lattice cores subjected to concentrated loads. In addition to graded lattice cores, uniform lattices and conventional honeycomb cores are analyzed. To obtain an optimized graded lattice core, a fully stressed design method is applied. Stresses and displacements are determined using a linear elastic analytical model that allows grading the core properties in a layerwise manner through the core thickness. The analysis indicates the superior performance of graded lattice cores compared to homogeneous lattice cores. However, conventional honeycombs outperform graded lattice cores in terms of load-to-weight ratio and stiffness-to-weight ratio. This study provides valuable insights for the design of lattice core sandwich panels and the advantages of several design approaches.

引用

页数：18