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Volume 38 Issue 5
Sep 2024
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Chinese Journal of High Pressure Physics  > 2024  >  38(5): 054103.
CHANG Xiaokang, LUO Benyong, CHEN Changhai, CHENG Yuansheng. Study on the Blast-Resistant Performance and Influence Factors of High-Toughness Steel Subjected to Close-Range Air-Blasts[J]. Chinese Journal of High Pressure Physics, 2024, 38(5): 054103. doi: 10.11858/gywlxb.20240732
Citation: CHANG Xiaokang, LUO Benyong, CHEN Changhai, CHENG Yuansheng. Study on the Blast-Resistant Performance and Influence Factors of High-Toughness Steel Subjected to Close-Range Air-Blasts[J]. Chinese Journal of High Pressure Physics, 2024, 38(5): 054103. doi: 10.11858/gywlxb.20240732
shu

Study on the Blast-Resistant Performance and Influence Factors of High-Toughness Steel Subjected to Close-Range Air-Blasts

doi: 10.11858/gywlxb.20240732
  • 1.

    School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Hubei 430074, Wuhan, China

  • 2.

    Marine Design and Research Institute of China, Shanghai 200011, China

  • Received Date: 26 Feb 2024
  • Rev Recd Date: 25 Mar 2024
  • Accepted Date: 17 Jun 2024
    • Available Online: 26 Jul 2024
  • Issue Publish Date: 29 Sep 2024
    Abstract
  • To study the blast-resistant performance and influence factors of high-toughness steel, dynamic response processes of high-toughness (HT) steel flat and stiffened plates were analyzed by numerical simulations and air-blast experiments. Firstly, air-blast experiments for both HT steel and high-strength (HS) steel flat plates were carried out. Comparisons of deformation and damage between HT and HS flat plates for experimental results were performed. Subsequently, deformation and failure processes of HT steel flat plates under close-range air-blast loading were analyzed by nonlinear finite element code LS-DYNA. The validity of numerical simulation method was verified by experimental results. On the basis of verification, the dynamic responses and failure mechanisms of HT steel flat and stiffened plates were further investigated by numerical simulations. Results show that under the close-range air blast of 1 200 g TNT charge and 100 mm stand-off distance, the HT steel flat plate of 10 mm thickness only produces large stretching deformation, whereas the HS steel flat plate of the same thickness appears a big crevasse at its central region. To the same thickness, HT steel flat plates behave obvious superior blast-resistant performance. Under close-range air-blast loading, HT steel flat plates mainly exhibit overall stretching deformation, whereas HT steel stiffened plates produce shear damage along stiffeners. As load intensity increases, three different failure modes occur for HT steel stiffened plates. The local shear stresses in the panel of the HT steel stiffened plate increase with the increase of stiffener’s height. This instead deteriorates the blast-resistant performance of HT steel stiffened plates. This study demonstrates the blast resistance superiority of HT steel, and can provide a technical support for the potential application of HT steel in warship protective structures.

     

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