Purpose

The purpose of this study is focused on the mechanical properties of multi-materials porous structures manufactured by selective laser melting (SLM).

Design/methodology/approach

The Diamond structure was designed by the triply periodic minimal surface function in MATLAB, and multi-materials porous structures were manufactured by SLM. Compression tests were applied to analyze the anisotropy of mechanical properties of multi-materials porous structures.

Findings

Compression results show that the multi-materials porous structure has a strong anisotropy behavior. When the compression force direction is parallel to the material arrangement, multi-materials porous structure was compressed in a layer-by-layer way, which is the traditional deformation of the gradient structure. However, when the compression force direction is perpendicular to the material arrangement, the compression curves show a near-periodic saw-tooth waveform characteristic, and this kind of structure was compressed consistently. It is demonstrated that the combination with high strength brittle material and low strength plastic material improves compression mode, and plastic material plays a role in buffering fracture.

Originality/value

This research provides a new method for the design and manufacturing of multi-materials porous structures and an approach to change the compression behavior of the porous structure.

中文翻译：

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基于增材制造的三重周期最小表面的多材料多孔结构的力学性能

目的

本研究的目的是研究通过选择性激光熔化 (SLM) 制造的多材料多孔结构的机械性能。

设计/方法/方法

Diamond结构由MATLAB中的三重周期最小表面函数设计，多材料多孔结构由SLM制造。应用压缩试验来分析多材料多孔结构力学性能的各向异性。

发现

压缩结果表明，多材料多孔结构具有很强的各向异性行为。当压缩力方向平行于材料排列时，多材料多孔结构被逐层压缩，这是梯度结构的传统变形。然而，当压缩力方向垂直于材料排列时，压缩曲线呈现近周期锯齿波形特征，这种结构被一致压缩。结果表明，高强度脆性材料和低强度塑性材料的结合改善了压缩模式，塑性材料起到缓冲断裂的作用。

原创性/价值

该研究为多材料多孔结构的设计和制造提供了一种新方法，并为改变多孔结构的压缩行为提供了一种途径。