Static and Dynamic Mechanical Properties of ZL114A Aluminum Alloy and Establishment of J-C Constituent Model

LU Zuchao; LU Laixiao; SUN Jie; SHI Qilong; ZHAN Hong; SHU Dayu

doi:10.3969/j.issn.1674-6457.2026.02.019

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Journal of Netshape Forming Engineering ›› 2026, Vol. 18 ›› Issue (2) : 208-217. DOI: 10.3969/j.issn.1674-6457.2026.02.019

Light Alloy Forming

Static and Dynamic Mechanical Properties of ZL114A Aluminum Alloy and Establishment of J-C Constituent Model

LU Zuchao¹, LU Laixiao^1,*, SUN Jie², SHI Qilong¹, ZHAN Hong³, SHU Dayu³

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Abstract

The work aims to study the static and dynamic mechanical properties of ZL114A aluminum alloy under different strain rates and temperature, and combine quasi-static tensile tests and dynamic Hopkinson bar tests to systematically analyze its flow stress behavior and establish a Johnson-Cook constitutive model. Quasi-static tensile tests were conducted with an electronic universal testing machine to obtain the stress-strain curve of the material under quasi-static conditions. Combined with a Split Hopkinson Pressure Bar (SHPB) equipped with an electromagnetic heating device, dynamic compression tests were conducted to obtain stress-strain curves of the material under different temperature and strain rates. The effects of temperature (20-420 ℃) and strain rate (1 500-5 800 s^-1) on the mechanical properties of the material were investigated. Through the method of least squares fitting of the experimental data, a Johnson-Cook constitutive model applicable under high temperature and high strain rate conditions was established. The results indicated that the material exhibited relatively weak strain rate sensitivity under room temperature and low strain rate conditions; It showed higher temperature sensitivity under high-temperature conditions; The flow stress of the material significantly increased with strain, while an increase in temperature led to a thermal softening effect, resulting in a decrease in flow stress. The established J-C constitutive model, fitted using the least squares method, can effectively couple the effects of strain, strain rate, and temperature, and its predictions are generally consistent with the experimental data within a certain range of error. In conclusion, the established Johnson-Cook constitutive model can effectively predict the mechanical response of materials under complex working conditions, providing a theoretical basis for structural design and optimization in the fields of aerospace, automotive, and mechanical engineering.

Key words

ZL114A aluminum alloy / static and dynamic mechanical properties / split hopkinson pressure bar tests / Johnson-Cook constitutive model / least squares method

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LU Zuchao, LU Laixiao, SUN Jie, SHI Qilong, ZHAN Hong, SHU Dayu. Static and Dynamic Mechanical Properties of ZL114A Aluminum Alloy and Establishment of J-C Constituent Model[J]. Journal of Netshape Forming Engineering. 2026, 18(2): 208-217 https://doi.org/10.3969/j.issn.1674-6457.2026.02.019

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