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Determination of Johnson–Cook Material Parameters for Armour Plate Using DIC and FEM

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Abstract

Understanding of material behavior of armour steel under large deformations and high strains during loading is very crucial in designing steel structures for various applications. Johnson–Cook flow stress and Johnson–Cook failure models were adopted for modeling and predicting the material flow behavior of armour plate. The material parameters of Johnson–Cook flow stress have been determined experimentally from tests performed at different strain rates (10−4–1550 s−1) and temperatures (25–600 °C). The damage parameters of Johnson–Cook failure model were determined through experiments on flat tensile specimens in combination with finite element simulation. Using these materials parameters, finite element simulations were performed on notch specimens of different radii between 2 mm and 20 mm loaded under tension. Load-strain curves were in good agreement with the experimentally obtained data. Triaxiality obtained from simulation were matched against the reported values from the literature.

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Acknowledgements

This research was supported by Tata Steel, Jamshedpur (RD/PROP/COL/273/2017). The authors are thankful to TBRL,DRDO, Chandigarh for conducting high strain rate tests and to NML-CSIR, Jamshedpur for conducting high temperature tests. Dr. Mohit Gupta is thankfully acknowledged for useful discussions.

Funding

This research was supported by Tata Steel, Jamshedpur, India (RD/PROP/COL/273/2017).

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Authors and Affiliations

  1. Department of Applied Mechanics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India

    Sangeeta Khare, Krishna Kumar & Puneet Mahajan

  2. Research and Development, Tata Steel Limited Jamshedpur, Jamshedpur, 831007, India

    Shashank Choudhary, Pundan Kumar Singh & Rahul Kumar Verma

Authors
  1. Sangeeta Khare
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  2. Krishna Kumar
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  3. Shashank Choudhary
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  4. Pundan Kumar Singh
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  5. Rahul Kumar Verma
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  6. Puneet Mahajan
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Contributions

The specific contributions made by each author are listed below. SK: Conceptualization, Methodology, Investigation, Roles/Writing—original draft. KK: Software, Validation, Formal analysis. SC: Resources, Investigation. PKS: Resources, Investigation. RKV: Project administration. PM: Conceptualization, Methodology, Supervision, Writing—review and Editing, Funding Acquisition.

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Correspondence to Sangeeta Khare.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Khare, S., Kumar, K., Choudhary, S. et al. Determination of Johnson–Cook Material Parameters for Armour Plate Using DIC and FEM. Met. Mater. Int. 27, 4984–4995 (2021). https://doi.org/10.1007/s12540-020-00895-3

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