Regulation Mechanism of the Shock Waves in a Pentamode Lattice-Ring Structure Subjected to Collision
This paper hopes to explore the application potential of pentamode materials in the field of shock protection. Hammer percussion tests revealed that the peak strain of the inner-ring front shock surface of the pentamode lattice-ring structure is 103.9% of that of the inner-ring rear shock surface. A...
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MDPI AG
2022-12-01
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author | Zhenhua Zhang Bangyi Han |
author_facet | Zhenhua Zhang Bangyi Han |
author_sort | Zhenhua Zhang |
collection | DOAJ |
description | This paper hopes to explore the application potential of pentamode materials in the field of shock protection. Hammer percussion tests revealed that the peak strain of the inner-ring front shock surface of the pentamode lattice-ring structure is 103.9% of that of the inner-ring rear shock surface. According to the simulation results, for a solid ring of equal mass made of the same base material, the ratio mentioned above reaches 3385.7%. Compared with the solid ring of equal mass made of the same base material, the pentamode lattice-ring structure saw a decline of 65.5% in the peak strain of its inner-ring front shock surface. The distribution laws of the group velocity characterizing energy-flow characteristics were discovered by calculating cell dispersion curves in various layers of the pentamode lattice-ring structure. The laws governing the effects of cellular structure parameters on group velocity anisotropy and pentamode characteristic parameters were also revealed. It was found that the deflection angle of the energy-flow vector is positively correlated with group velocity anisotropy and that the effects of pentamode characteristic parameters <i>π</i> and <i>μ</i> on the deflection angle of the energy-flow vector vary greatly in different value ranges. The deflection angle of the energy-flow vector has a decisive effect on the protection performance of the pentamode lattice-ring structure. The conclusions of this study can provide some theoretical support for the shock protection of submarine structures. |
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spelling | doaj.art-b630e13228924cce8a3dfa38933b9a642023-11-24T14:10:18ZengMDPI AGCrystals2073-43522022-12-011212174910.3390/cryst12121749Regulation Mechanism of the Shock Waves in a Pentamode Lattice-Ring Structure Subjected to CollisionZhenhua Zhang0Bangyi Han1College of Naval Architecture and Ocean, Naval University of Engineering, Wuhan 430033, ChinaCollege of Naval Architecture and Ocean, Naval University of Engineering, Wuhan 430033, ChinaThis paper hopes to explore the application potential of pentamode materials in the field of shock protection. Hammer percussion tests revealed that the peak strain of the inner-ring front shock surface of the pentamode lattice-ring structure is 103.9% of that of the inner-ring rear shock surface. According to the simulation results, for a solid ring of equal mass made of the same base material, the ratio mentioned above reaches 3385.7%. Compared with the solid ring of equal mass made of the same base material, the pentamode lattice-ring structure saw a decline of 65.5% in the peak strain of its inner-ring front shock surface. The distribution laws of the group velocity characterizing energy-flow characteristics were discovered by calculating cell dispersion curves in various layers of the pentamode lattice-ring structure. The laws governing the effects of cellular structure parameters on group velocity anisotropy and pentamode characteristic parameters were also revealed. It was found that the deflection angle of the energy-flow vector is positively correlated with group velocity anisotropy and that the effects of pentamode characteristic parameters <i>π</i> and <i>μ</i> on the deflection angle of the energy-flow vector vary greatly in different value ranges. The deflection angle of the energy-flow vector has a decisive effect on the protection performance of the pentamode lattice-ring structure. The conclusions of this study can provide some theoretical support for the shock protection of submarine structures.https://www.mdpi.com/2073-4352/12/12/1749pentamode materiallattice materialshock stress waveenergy-flow vectordispersion curve |
spellingShingle | Zhenhua Zhang Bangyi Han Regulation Mechanism of the Shock Waves in a Pentamode Lattice-Ring Structure Subjected to Collision Crystals pentamode material lattice material shock stress wave energy-flow vector dispersion curve |
title | Regulation Mechanism of the Shock Waves in a Pentamode Lattice-Ring Structure Subjected to Collision |
title_full | Regulation Mechanism of the Shock Waves in a Pentamode Lattice-Ring Structure Subjected to Collision |
title_fullStr | Regulation Mechanism of the Shock Waves in a Pentamode Lattice-Ring Structure Subjected to Collision |
title_full_unstemmed | Regulation Mechanism of the Shock Waves in a Pentamode Lattice-Ring Structure Subjected to Collision |
title_short | Regulation Mechanism of the Shock Waves in a Pentamode Lattice-Ring Structure Subjected to Collision |
title_sort | regulation mechanism of the shock waves in a pentamode lattice ring structure subjected to collision |
topic | pentamode material lattice material shock stress wave energy-flow vector dispersion curve |
url | https://www.mdpi.com/2073-4352/12/12/1749 |
work_keys_str_mv | AT zhenhuazhang regulationmechanismoftheshockwavesinapentamodelatticeringstructuresubjectedtocollision AT bangyihan regulationmechanismoftheshockwavesinapentamodelatticeringstructuresubjectedtocollision |