Effect of micro-porosity distribution on property of metallic hollow sphere under quasi-static compression

被引：0

作者：

Song J. ^{[1
,2
]}

Liu W. ^{[1
]}

Sun Q. ^{[1
]}

Yang J. ^{[3
]}

机构：

[1] School of Civil Engineering, Northeast Forestry University, Harbin

[2] State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan

[3] College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin

来源：

Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2020年 / 48卷 / 08期

关键词：

Compression deformation; Failure mode; Metallic hollow sphere; Micro-porosity; Numerical simulation; Quasi-static compression test;

D O I：

10.13245/j.hust.200805

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A scanning electron microscope (SEM) and X-ray tomography (XCT) were conducted to probe the morphology of the thin wall and get the range of the microporosity, as well as the deformation process and failure of single metallic hollow sphere (MHS) with different distributions of microporosities on the thin wall were analyzed by finite element modelling (FEM) simulation and experimental tests. The results show that the deformation process is summarized into four stages, elasticity, buckling and yielding, collapse and densification, separately. And for the effect of the microporosity, when there exist weak regions on the local partitions of the single MHS thin wall, the weak regions will buckle first and generate buckling lines on the single MHS if they are adjacent. The buckling failures will occur along these buckling lines on the MHS under the quasi-static compression, among the buckling lines will generate hinges which make contributions on load capacity during the densification process. The results provide some theoretical guidance on the design and manufacturing of metallic hollow sphere foams. © 2020, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.

引用

页码：26 / 32

页数：6

共 19 条

[1] LIU Y, ZHANG X C., The influence of cell micro-topology on the in-plane dynamic crushing of honey-combs, International Journal of Impact Engineering, 36, 1, pp. 98-109, (2009)
[2] RABIEI A, VENDRA L J., A comparison of composite metal foam's properties and other comparable metal foams, Materials Letters, 63, 5, pp. 533-536, (2009)
[3] ZHANG X C, AN L Q, DING H M, Et al., The influence of cell micro-structure on the in-plane dynamic crushing of honeycombs with negative Poisson's ratio, Journal of Sandwich Structures and Materials, 17, 1, pp. 26-55, (2015)
[4] 8
[5] WU H X, LIU Y, ZHANG X C., In-plane crushing behavior and energy absorption design of composite honeycombs, Acta Mechanica Sinica, 34, 6, pp. 1108-1123, (2018)
[6] 32, pp. 1-4
[7] VESENJAK M, FIEDLER T, REN Z, Et al., Behaviour of syntactic and partial hollow sphere structures under dynamic loading, Advanced Engineering Materials, 10, 3, pp. 185-191, (2008)
[8] AUGUSTIN C, HUNGERBACH W., Production of hollow spheres (HS) and hollow sphere structures(HSS), Materials Letters, 63, 13, pp. 1109-1112, (2009)
[9] LIM T J, SMITH B, DOWELL D L., Behavior of a random hollow sphere metal foam, Acta Materialia, 50, 11, pp. 2867-2879, (2002)
[10] KARAGIOZOVA D, YU T X, GAO Z Y., Modelling of MHS cellular solid in large strains, International Journal of Mechanical Sciences, 48, 11, pp. 1273-1286, (2006)

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