3D打印多孔金属结构在压缩载荷作用下的力学行为及响应机制

蔡宣明; 侯阳; 张伟; 范志强; 高玉波; 王俊元; 孙河洋; 张柱军; 杨文澍

doi:10.1007/s12613-024-2865-0

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文章导航 > 矿物冶金与材料学报（英文） > 2024 > 31(4): 737-749

Xuanming Cai, Yang Hou, Wei Zhang, Zhiqiang Fan, Yubo Gao, Junyuan Wang, Heyang Sun, Zhujun Zhang, and Wenshu Yang, Mechanical behavior and response mechanism of porous metal structures manufactured by laser powder bed fusion under compressive loading, Int. J. Miner. Metall. Mater., 31(2024), No. 4, pp. 737-749. https://doi.org/10.1007/s12613-024-2865-0

Cite this article as:

Xuanming Cai, Yang Hou, Wei Zhang, Zhiqiang Fan, Yubo Gao, Junyuan Wang, Heyang Sun, Zhujun Zhang, and Wenshu Yang, Mechanical behavior and response mechanism of porous metal structures manufactured by laser powder bed fusion under compressive loading, Int. J. Miner. Metall. Mater., 31(2024), No. 4, pp. 737-749. https://doi.org/10.1007/s12613-024-2865-0

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研究论文

3D打印多孔金属结构在压缩载荷作用下的力学行为及响应机制

1)
中北大学航空宇航学院，太原 030051，中国
2)
中北大学材料科学与工程学院，太原 030051，中国
3)
哈尔滨工业大学航天学院，哈尔滨 150080，中国
4)
中北大学机械工程学院, 太原 030051，中国
5)
中国人民解放军陆军工程大学，石家庄 050003，中国
6)
65589部队91分队，大庆 163411，中国
7)
哈尔滨工业大学材料科学与工程学院，哈尔滨 150080，中国

通讯作者:
蔡宣明 E-mail: caixm@nuc.edu.cn

杨文澍 E-mail: yws001003@163.com

文章亮点

(1) 明确了三种不同积分数AlSi10Mg多孔结构的力学行为。

(2) 获得了AlSi10Mg多孔结构同时具有韧性和脆性双重力学特性损伤模式。

(3) 确定了沿斜截面相对错动而发生剪切破坏是导致结构损坏的最直接原因。

(4) 文中构建的多孔结构归一化能量吸收模式较好地诠释了多孔结构能量吸收状态。

中文摘要

为全面认识AlSi10Mg多孔结构在压缩载荷作用下的力学行为、损伤模式及吸能机制，从而展开了一系列的实验和数值模拟研究。对标高冲击、强吸能、轻量化特性需求，设计优化了三种体积分数AlSi10Mg多孔结构。通过不同加载速率下的实验研究，获得了不同体积分数AlSi10Mg多孔结构的力学行为，包括应力–应变关系、结构承载状态、变形破坏模式及能量吸收特性。损伤断面细观结构损伤模式指出该AlSi10Mg多孔结构同时具有韧性和脆性双重力学特性。数值模拟研究表明，该AlSi10Mg多孔结构沿斜截面相对错动而发生剪切破坏，且破坏位置与轴向加载方向几乎呈45°，这一破坏模式是导致其结构损坏的最直接原因，揭示了AlSi10Mg多孔结构在压缩载荷作用下的损伤破坏机理。文中构建的多孔结构归一化能量吸收模式，较好地诠释了该AlSi10Mg多孔结构能量吸收状态，并给出了其结构敏感位置，研究结果为同行在结构设计及优化时提供了重要的参考依据。

关键词:

Research Article

Mechanical behavior and response mechanism of porous metal structures manufactured by laser powder bed fusion under compressive loading

+ Author Affiliations

1)
School of Aerospace Engineering, North University of China, Taiyuan 030051, China
2)
School of Materials Science and Engineering, North University of China, Taiyuan 030051, China
3)
School of Astronautics, Harbin Institute of Technology, Harbin 150080, China
4)
School of Mechanical Engineering, North University of China, Taiyuan 030051, China
5)
Shijiazhuang Campus, Army Engineering University of PLA, Shijiazhuang 050003, China
6)
65589 Unit 91 Detachment, Daqing 163411, China
7)
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China

All authors declare that they have no conflict of interest.

Corresponding authors:
Xuanming Cai E-mail: caixm@nuc.edu.cn

Wenshu Yang E-mail: yws001003@163.com
Received: 30 November 2023; Revised: 17 January 2024; Accepted: 26 February 2024; Available online: 27 February 2024

Abstract

Abstract

AlSi10Mg porous protective structure often produces different damage forms under compressive loading, and these damage modes affect its protective function. In order to well meet the service requirements, there is an urgent need to comprehensively understand the mechanical behavior and response mechanism of AlSi10Mg porous structures under compressive loading. In this paper, AlSi10Mg porous structures with three kinds of volume fractions are designed and optimized to meet the requirements of high-impact, strong-energy absorption, and lightweight characteristics. The mechanical behaviors of AlSi10Mg porous structures, including the stress–strain relationship, structural bearing state, deformation and damage modes, and energy absorption characteristics, were obtained through experimental studies at different loading rates. The damage pattern of the damage section indicates that AlSi10Mg porous structures have both ductile and brittle mechanical properties. Numerical simulation studies show that the AlSi10Mg porous structure undergoes shear damage due to relative misalignment along the diagonal cross-section, and the damage location is almost at 45° to the load direction, which is the most direct cause of its structural damage, revealing the damage mechanism of AlSi10Mg porous structures under the compressive load. The normalized energy absorption model constructed in the paper well interprets the energy absorption state of AlSi10Mg porous structures and gives the sensitive location of the structures, and the results of this paper provide important references for peers in structural design and optimization.
- AlSi10Mg;
- additive manufacture;
- energy absorption characteristics;
- damage by deformation;
- mechanical behavior

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