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Dynamic Deformation Behaviors and Constitutive Relations of High-Strength Weldox700E Steel

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Abstract

High-strength Weldox700E steel has been increasingly applied to dynamic environment because of its high strength and good toughness. The plastic deformation behaviors of Weldox700E steel at strain rates ranging from \(10^{-4}\) to \(6200~ \hbox {s}^{-1}\) are investigated by the quasi-static and dynamic uniaxial compression tests. The Weldox700E steel exhibits rate-related plastic behavior, work hardening and thermal softening behaviors. Due to the nonlinear strain rate effect of the material and the adiabatic temperature rise caused by high-speed impact compression, the properties of material are greatly affected. By improving the strain rate enhancement term and temperature term in the Johnson–Cook constitutive model, a new constitutive model was proposed to describe the dynamic mechanical behavior of Weldox700E steel. This constitutive equation was implemented into the finite element software, ABAQUS, via an explicit user material subroutine utilizing the stress update algorithm. The simulation results at different strain rates were in good agreement with the experimental data, verifying the validity of the constitutive model.

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Acknowledgements

This work was supported by the National Key R&D Program of China (2016YFC0801200).

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Authors and Affiliations

  1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing, 100081, China

    Xianzhe Zhong & Qingming Zhang

  2. Institute for Special Steels, Central Iron and Steel Research Institute, Beijing, 100081, China

    Yongming Yan

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  1. Xianzhe Zhong
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Correspondence to Qingming Zhang.

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Zhong, X., Yan, Y. & Zhang, Q. Dynamic Deformation Behaviors and Constitutive Relations of High-Strength Weldox700E Steel. Acta Mech. Solida Sin. 32, 431–445 (2019). https://doi.org/10.1007/s10338-019-00098-3

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  • DOI: https://doi.org/10.1007/s10338-019-00098-3

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