Correction of strain rate parameters of Johnson-Cook constitutive model for Ti-based metallic glass composites

Linjiang Zhou; Zhilin Long II; Gang Wei III

doi:10.1117/12.2639041

29 April 2022 Correction of strain rate parameters of Johnson-Cook constitutive model for Ti-based metallic glass composites

Linjiang Zhou, Zhilin Long II, Gang Wei III

Author Affiliations +

Proceedings Volume 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022); 1225522 (2022) https://doi.org/10.1117/12.2639041
Event: 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 2022, Chongqing, China

Abstract

In order to correct the Johnson-Cook (J-C) model strain rate strengthening coefficient of Ti-based metallic glass composites (MGMC), three Ti-based metallic glass composites: Ti₆₀Zr₁₄V₁₂Cu₄Be₁₀, Ti₅₈Zr₁₂Ni₆Ta₁₃Be₁₁ and Ti₄₈Zr₁₈V₁₂Cu₅Be₁₇, referred to as Ti₆₀, Ti₅₈ and Ti₄₈, were selected in this paper. Under the condition of high strain rate, the temperature inside the sample often rises due to adiabatic strain in the split Hopkinson compression bar test. Taking this phenomenon as the research object, the first-order differential equation of temperature and strain is established and solved by the Runge-Kutta method. The multivariate fitting was performed by the square method to correct the strain rate intensification coefficient of the J-C model. The results show that the corrected J-C model can better describe the variation law of flow stress.

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Linjiang Zhou, Zhilin Long II, and Gang Wei III "Correction of strain rate parameters of Johnson-Cook constitutive model for Ti-based metallic glass composites", Proc. SPIE 12255, 2022 International Conference on Optoelectronic Information and Functional Materials (OIFM 2022), 1225522 (29 April 2022); https://doi.org/10.1117/12.2639041

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