Multiscale simulation of the compress behavior on single crystal copper microstructure based on quasicontinuum method

Qingshun Bai, Xiangqian Zhang, Zhen Tong, Yingchun Liang, Hongmin Pen

Research output: Contribution to journalArticle

Abstract

Based on quasicontinuum (QC) multiscale simulation method, a series of simulation models were set up for compressing rod-shaped microstructure of single crystal Cu. The effects of structural parameters on typical mechanics parameters were analyzed, such as elastic modulus, ultimate elastic stress, yield strength and Poisson's ratio. The mechanisms of crush and compressed deformation were also revealed according to the analysis of displacement, inner stress and strain energy. It can be shown that the size effects of elastic modulus, ultimate elastic stress and yield strength in compression of microstructure are more obvious than that in macro scale. However, the size effect of Poisson's ratio is not remarkable in the simulation results. The dimension change in one direction cannot influence the mechanics parameters greatly. Mechanical twins and dislocation contribute mainly to the compression behavior. Meanwhile, stress concentration can also be found in the inner partial area and the stain energy decreases instantly after the crush of rod-shaped microstructure.

LanguageEnglish
Pages810-815
Number of pages6
JournalJixie Qiangdu/Journal of Mechanical Strength
Volume35
Issue number6
Publication statusPublished - Dec 2013
Externally publishedYes

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Multiscale Simulation
Single Crystal
Copper
Microstructure
Poisson's Ratio
Size Effect
Elastic Modulus
Single crystals
Poisson ratio
Yield stress
Mechanics
Compression
Elastic moduli
Multiscale Methods
Stress Concentration
Yield Stress
Structural Parameters
Strain Energy
Strain energy
Dislocation

Cite this

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title = "Multiscale simulation of the compress behavior on single crystal copper microstructure based on quasicontinuum method",
abstract = "Based on quasicontinuum (QC) multiscale simulation method, a series of simulation models were set up for compressing rod-shaped microstructure of single crystal Cu. The effects of structural parameters on typical mechanics parameters were analyzed, such as elastic modulus, ultimate elastic stress, yield strength and Poisson's ratio. The mechanisms of crush and compressed deformation were also revealed according to the analysis of displacement, inner stress and strain energy. It can be shown that the size effects of elastic modulus, ultimate elastic stress and yield strength in compression of microstructure are more obvious than that in macro scale. However, the size effect of Poisson's ratio is not remarkable in the simulation results. The dimension change in one direction cannot influence the mechanics parameters greatly. Mechanical twins and dislocation contribute mainly to the compression behavior. Meanwhile, stress concentration can also be found in the inner partial area and the stain energy decreases instantly after the crush of rod-shaped microstructure.",
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Multiscale simulation of the compress behavior on single crystal copper microstructure based on quasicontinuum method. / Bai, Qingshun; Zhang, Xiangqian; Tong, Zhen; Liang, Yingchun; Pen, Hongmin.

In: Jixie Qiangdu/Journal of Mechanical Strength, Vol. 35, No. 6, 12.2013, p. 810-815.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Multiscale simulation of the compress behavior on single crystal copper microstructure based on quasicontinuum method

AU - Bai, Qingshun

AU - Zhang, Xiangqian

AU - Tong, Zhen

AU - Liang, Yingchun

AU - Pen, Hongmin

PY - 2013/12

Y1 - 2013/12

N2 - Based on quasicontinuum (QC) multiscale simulation method, a series of simulation models were set up for compressing rod-shaped microstructure of single crystal Cu. The effects of structural parameters on typical mechanics parameters were analyzed, such as elastic modulus, ultimate elastic stress, yield strength and Poisson's ratio. The mechanisms of crush and compressed deformation were also revealed according to the analysis of displacement, inner stress and strain energy. It can be shown that the size effects of elastic modulus, ultimate elastic stress and yield strength in compression of microstructure are more obvious than that in macro scale. However, the size effect of Poisson's ratio is not remarkable in the simulation results. The dimension change in one direction cannot influence the mechanics parameters greatly. Mechanical twins and dislocation contribute mainly to the compression behavior. Meanwhile, stress concentration can also be found in the inner partial area and the stain energy decreases instantly after the crush of rod-shaped microstructure.

AB - Based on quasicontinuum (QC) multiscale simulation method, a series of simulation models were set up for compressing rod-shaped microstructure of single crystal Cu. The effects of structural parameters on typical mechanics parameters were analyzed, such as elastic modulus, ultimate elastic stress, yield strength and Poisson's ratio. The mechanisms of crush and compressed deformation were also revealed according to the analysis of displacement, inner stress and strain energy. It can be shown that the size effects of elastic modulus, ultimate elastic stress and yield strength in compression of microstructure are more obvious than that in macro scale. However, the size effect of Poisson's ratio is not remarkable in the simulation results. The dimension change in one direction cannot influence the mechanics parameters greatly. Mechanical twins and dislocation contribute mainly to the compression behavior. Meanwhile, stress concentration can also be found in the inner partial area and the stain energy decreases instantly after the crush of rod-shaped microstructure.

KW - Compress

KW - Mechanics property

KW - Multiscale simulation

KW - Rod-shaped microstructure

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