Dynamic tests and constitutive model for 7075-T6 aluminum alloy

Can Jun Xie; Ming Bo Tong; Fu Liu; Zhi Gang Li; Ya Zhou Guo; Xiao Chuan Liu

doi:10.13465/j.cnki.jvs.2014.18.018

Dynamic tests and constitutive model for 7075-T6 aluminum alloy

Can Jun Xie, Ming Bo Tong, Fu Liu, Zhi Gang Li, Ya Zhou Guo, Xiao Chuan Liu

School of Aeronautics

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

Dynamic tests for 7075-T6 aluminum alloy under quasi-static, medium strain rate and high strain rate were performed by using an electronic universal testing machine a high velocity hydraulic servo-testing machine and a split Hopkinson tensile bar (SHTB) at room temperature. Stress-strain curves under different strain rates were obtained. The experimental results showed that the strain rate hardening effect of 7075-T6 aluminum alloy is obvious; the necking phenomenon of specimens' fracture is more remarkable with increase in strain rate. A Johnson-Cook constitutive model reflecting strain rate hardening effect of 7075-T6 aluminum alloy was fitted. The term of strain rate hardening in Johnson-Cook equation was modified to make the fitted results agree better with the test ones.

Original language	English
Pages (from-to)	110-114 and 125
Journal	Zhendong yu Chongji/Journal of Vibration and Shock
Volume	33
Issue number	18
DOIs	https://doi.org/10.13465/j.cnki.jvs.2014.18.018
State	Published - 28 Sep 2014

Keywords

7075-T6 aluminum alloy
Constitutive relation
Experiment
Johnson-Cook model
Strain rate

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10.13465/j.cnki.jvs.2014.18.018

Cite this

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title = "Dynamic tests and constitutive model for 7075-T6 aluminum alloy",

abstract = "Dynamic tests for 7075-T6 aluminum alloy under quasi-static, medium strain rate and high strain rate were performed by using an electronic universal testing machine a high velocity hydraulic servo-testing machine and a split Hopkinson tensile bar (SHTB) at room temperature. Stress-strain curves under different strain rates were obtained. The experimental results showed that the strain rate hardening effect of 7075-T6 aluminum alloy is obvious; the necking phenomenon of specimens' fracture is more remarkable with increase in strain rate. A Johnson-Cook constitutive model reflecting strain rate hardening effect of 7075-T6 aluminum alloy was fitted. The term of strain rate hardening in Johnson-Cook equation was modified to make the fitted results agree better with the test ones.",

keywords = "7075-T6 aluminum alloy, Constitutive relation, Experiment, Johnson-Cook model, Strain rate",

author = "Xie, {Can Jun} and Tong, {Ming Bo} and Fu Liu and Li, {Zhi Gang} and Guo, {Ya Zhou} and Liu, {Xiao Chuan}",

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T1 - Dynamic tests and constitutive model for 7075-T6 aluminum alloy

AU - Xie, Can Jun

AU - Tong, Ming Bo

AU - Liu, Fu

AU - Li, Zhi Gang

AU - Guo, Ya Zhou

AU - Liu, Xiao Chuan

PY - 2014/9/28

Y1 - 2014/9/28

N2 - Dynamic tests for 7075-T6 aluminum alloy under quasi-static, medium strain rate and high strain rate were performed by using an electronic universal testing machine a high velocity hydraulic servo-testing machine and a split Hopkinson tensile bar (SHTB) at room temperature. Stress-strain curves under different strain rates were obtained. The experimental results showed that the strain rate hardening effect of 7075-T6 aluminum alloy is obvious; the necking phenomenon of specimens' fracture is more remarkable with increase in strain rate. A Johnson-Cook constitutive model reflecting strain rate hardening effect of 7075-T6 aluminum alloy was fitted. The term of strain rate hardening in Johnson-Cook equation was modified to make the fitted results agree better with the test ones.

AB - Dynamic tests for 7075-T6 aluminum alloy under quasi-static, medium strain rate and high strain rate were performed by using an electronic universal testing machine a high velocity hydraulic servo-testing machine and a split Hopkinson tensile bar (SHTB) at room temperature. Stress-strain curves under different strain rates were obtained. The experimental results showed that the strain rate hardening effect of 7075-T6 aluminum alloy is obvious; the necking phenomenon of specimens' fracture is more remarkable with increase in strain rate. A Johnson-Cook constitutive model reflecting strain rate hardening effect of 7075-T6 aluminum alloy was fitted. The term of strain rate hardening in Johnson-Cook equation was modified to make the fitted results agree better with the test ones.

KW - 7075-T6 aluminum alloy

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KW - Strain rate

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Dynamic tests and constitutive model for 7075-T6 aluminum alloy

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