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Effect of Time Step Scale Factor Value on the Low Velocity Impact Numerical Simulation Results in LS-DYNA

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Dynamic Behavior of Soft and Hard Materials Volume 1 (IMPLAST 2022)

Part of the book series: Springer Proceedings in Materials ((SPM,volume 34))

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Abstract

The major focus of this investigation is to analyze the effect of the time step scale factor (TSSFAC) parameter value on the numerical simulation results obtained by LS-DYNA for glass fiber reinforced polymer (GFRP) composite laminates subjected to low velocity impact. The TSSFAC is a parameter in the CONTROL_TIMESTEP keycard. The numerical simulations are conducted for two impact velocities 1.5 m/s and 4 m/s. At 1.5 m/s impact velocity, the impactor rebounded, whereas at an impact velocity 4 m/s, the impactor perforated the GFRP composite laminate. The TSSFAC values considered for the numerical simulation are 0.001, 0.01, 0.1, 0.5, 0.6, 0.7, and 0.9. The TSSFAC values affected both numerical simulation accuracy and numerical simulation time. However, the extent of influence of TSSFAC is high for simulation time compared to the numerical simulation accuracy. The simulation time increased as the TSSFAC value decreased. It was found that the TSSFAC value 0.6 yielded minimum simulation time compared to other TSSFAC values. Further, the best correlation between experimental and simulation results is found for 0.6 TSSFAC value.

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Authors and Affiliations

  1. Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India

    Mahesh & Kalyan Kumar Singh

  2. Indian Institute of Technology Madras, Chennai, 600036, India

    Shivank Kumar & Prashant Rawat

Authors
  1. Mahesh
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  2. Shivank Kumar
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  3. Kalyan Kumar Singh
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  4. Prashant Rawat
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Corresponding author

Correspondence to Prashant Rawat .

Editor information

Editors and Affiliations

  1. Department of Aerospace Engineering, Indian Institute of Technology Madras, Chennai, India

    R. Velmurugan

  2. Department of Mechanical Engineering, Indian Institute of Technology Madras, Chennai, India

    G. Balaganesan

  3. Department of Materials Science and Engineering, University of California, Irvine, CA, USA

    Naresh Kakur

  4. Department of Mechanical Engineering, Durban University of Technology, Durban, South Africa

    Krishnan Kanny

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© 2024 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

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Mahesh, Kumar, S., Singh, K.K., Rawat, P. (2024). Effect of Time Step Scale Factor Value on the Low Velocity Impact Numerical Simulation Results in LS-DYNA. In: Velmurugan, R., Balaganesan, G., Kakur, N., Kanny, K. (eds) Dynamic Behavior of Soft and Hard Materials Volume 1. IMPLAST 2022. Springer Proceedings in Materials, vol 34. Springer, Singapore. https://doi.org/10.1007/978-981-99-6030-9_45

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