Volume 36 Issue 5
Oct 2022
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LIAO Fang, LI Shiqiang, WU Guiying. Topological Optimization and Dynamic Response of Periodic Porous Sandwich Structure under Impact Load[J]. Chinese Journal of High Pressure Physics, 2022, 36(5): 054201. doi: 10.11858/gywlxb.20220560
Citation: LIAO Fang, LI Shiqiang, WU Guiying. Topological Optimization and Dynamic Response of Periodic Porous Sandwich Structure under Impact Load[J]. Chinese Journal of High Pressure Physics, 2022, 36(5): 054201. doi: 10.11858/gywlxb.20220560

Topological Optimization and Dynamic Response of Periodic Porous Sandwich Structure under Impact Load

doi: 10.11858/gywlxb.20220560
  • Received Date: 07 Apr 2022
  • Rev Recd Date: 17 Apr 2022
  • Accepted Date: 17 Apr 2022
  • Available Online: 31 Aug 2022
  • Issue Publish Date: 11 Oct 2022
  • In this study, under the frame of equivalent static loads (ESL) method structural optimization and based on hard-kill bi-directional evolutionary structural optimization (hard-kill BESO), the topological optimization method for periodic porous sandwich structure under impact load was carried out. The commercial software ABAQUS was used to investigate the deformation patterns of the optimized periodic sandwich structure and the sandwich structures with trapezoidal, rectangular and random Voronoi cores under the impact load imposed by a rigid body with an initial velocity of 100 m/s. In the early stage of load, the upper half of the core layer of the optimized periodic sandwich structure is completely compressed and the energy absorption is higher than the other three structures. However, the total energy absorption of the optimal sandwich structure is slightly less than the other three due to the small plastic deformation at the end stage of load. To study the capabilities of the topologically optimized structure under different load conditions, the energy absorption performance of the four sandwich structures subjected to the rigid body impact loads at different velocities and three impulse loads were compared. After comprehensively considering the deflection at the centers of top and bottom panels, the specific energy absorption, the ratio of energy absorption of core layer, as well as the mean impact load, it shows that the optimized sandwich periodic structure performs higher energy absorption capability and resistance under the rigid body impact. The specific energy absorption of the optimal sandwich structure is less than the sandwich structure with rectangular core under rectangular impulse, losing advantages of the structural optimization. It indicates that the optimization design obtained under a single load condition cannot get the best performance for any load condition, and further research is required for different load conditions.

     

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