The compressive performances of 3D-printed micron-size corrugated sandwich structures

IF 3.5 3区材料科学 Q1 ENGINEERING, MECHANICAL

Journal of Sandwich Structures & Materials Pub Date : 2023-04-07 DOI:10.1177/10996362231169976

Lijun Ji, Weilin Liu, Wensheng Gong, Xiang Qin, Lingling Liu, Liping Luo

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引用次数: 1

Abstract

Micron-scale grid-shaped, V-shaped and U-shaped corrugated sandwich structures are fabricated by 3D printing technology and present different mechanical properties from those made by traditional method. Their peak stresses and elastic moduli could be fitted to cubic functions. The compression performance of the multilayer grid-shaped sandwich can be determined by the relative mechanical strength of layers. Adding a layer on a grid-shaped sandwich has no significant influence on the peak stress, but can enhance the elastic modulus by about 60.9 MPa. The deformation modes of multilayer V-shaped and U-shaped sandwiches can be determined by the load carrying path and the relative mechanical properties between interlayers and cores. The elastic modulus of V-shaped sandwich is enhanced with the increase of layer number, while the elastic modulus of U-shaped sandwich decreases with the increase of layer number. The peak stress and the elastic modulus of a four-layer V-shaped sandwich can reach 9.85 MPa and 261.09 MPa, and those of a four-layer U-shaped sandwich can reach 4.79 MPa and 119.18 MPa. The result reveals the principles that the reduced structural size and suppressed debonding, the structures and the load carrying path, and materials, influence the failure mode and mechanical properties of the corrugated sandwiches. Graphical Abstract

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3d打印微米级波纹夹层结构的压缩性能

采用3D打印技术制备了微米尺度的网格形、v形和u形波纹夹层结构，其力学性能与传统方法不同。它们的峰值应力和弹性模量可以拟合为三次函数。多层网格夹层的抗压性能可由层间的相对机械强度决定。在网格状夹层上加层对峰值应力无显著影响，但可使弹性模量提高约60.9 MPa。多层v形和u形夹层的变形模式可由其承载路径和夹层与岩心之间的相对力学性能决定。v型夹层的弹性模量随层数的增加而增大，u型夹层的弹性模量随层数的增加而减小。四层v型夹层的峰值应力和弹性模量可达9.85 MPa和261.09 MPa，四层u型夹层的峰值应力和弹性模量可达4.79 MPa和119.18 MPa。研究结果揭示了减小结构尺寸和抑制剥离、结构和承载路径、材料等因素对波纹夹层破坏模式和力学性能的影响规律。图形抽象

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来源期刊

Journal of Sandwich Structures & Materials 工程技术-材料科学：表征与测试

CiteScore

9.60

自引率

2.60%

发文量

审稿时长

7 months

期刊介绍： The Journal of Sandwich Structures and Materials is an international peer reviewed journal that provides a means of communication to fellow engineers and scientists by providing an archival record of developments in the science, technology, and professional practices of sandwich construction throughout the world. This journal is a member of the Committee on Publication Ethics (COPE).