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不同制备方法下金字塔晶格结构的压缩和能量吸收特性

Compressive and Energy Absorption Properties of Pyramidal Lattice Structures by Various Preparation Methods.

作者信息

Zhang Hairi, Wang Xingfu, Shi Zimu, Xue Jintao, Han Fusheng

机构信息

Key Laboratory of Materials Physics, Institute of Solid State Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China.

Science Island Branch, Graduate School of USTC, Hefei 230026, China.

出版信息

Materials (Basel). 2021 Oct 28;14(21):6484. doi: 10.3390/ma14216484.

DOI:10.3390/ma14216484
PMID:34772009
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8585465/
Abstract

Metallic three-dimensional lattice structures exhibit many favorable mechanical properties including high specific strength, high mechanical efficiency and superior energy absorption capability, being prospective in a variety of engineering fields such as light aerospace and transportation structures as well as impact protection apparatus. In order to further compare the mechanical properties and better understand the energy absorption characteristics of metal lattice structures, enhanced pyramidal lattice structures of three strut materials was prepared by 3D printing combined with investment casting and direct metal additive manufacturing. The compressive behavior and energy absorption property are theoretically analyzed by finite element simulation and verified by experiments. It is shown that the manufacturing method of 3D printing combined with investment casting eliminates stress fluctuations in plateau stages. The relatively ideal structure is given by examination of stress-strain behavior of lattice structures with varied parameters. Moreover, the theoretical equation of compressive strength is established that can predicts equivalent modulus and absorbed energy of lattice structures.

摘要

金属三维晶格结构具有许多良好的力学性能，包括高比强度、高机械效率和卓越的能量吸收能力，在诸如轻型航空航天和交通结构以及冲击保护装置等各种工程领域具有广阔前景。为了进一步比较金属晶格结构的力学性能并更好地理解其能量吸收特性，通过3D打印结合熔模铸造和直接金属增材制造制备了三种支柱材料的增强金字塔晶格结构。通过有限元模拟对其压缩行为和能量吸收特性进行了理论分析，并通过实验进行了验证。结果表明，3D打印结合熔模铸造的制造方法消除了平台阶段的应力波动。通过研究不同参数晶格结构的应力-应变行为给出了相对理想的结构。此外，建立了抗压强度理论方程，该方程可以预测晶格结构的等效模量和吸收能量。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a617/8585465/ca384f4b41ea/materials-14-06484-g014.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a617/8585465/52bf91be2f0d/materials-14-06484-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a617/8585465/d53e4d1ecf3f/materials-14-06484-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a617/8585465/184127e6f2bc/materials-14-06484-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a617/8585465/bec06c22e42c/materials-14-06484-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a617/8585465/55fe9c244962/materials-14-06484-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a617/8585465/748ba4feb7b2/materials-14-06484-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a617/8585465/4ca1b2e2ade5/materials-14-06484-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a617/8585465/c98f554e6543/materials-14-06484-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a617/8585465/3fc55d6611e1/materials-14-06484-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a617/8585465/0f24042432b4/materials-14-06484-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a617/8585465/975898affeeb/materials-14-06484-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/a617/8585465/ca384f4b41ea/materials-14-06484-g014.jpg

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