Analysis of explosion resistance of the blast wall with negative Poisson’s ratio Structure

WANG Qianhui; QUAN Guan; LI Qinghua; YAO Pan; XU Shilang

doi:10.11883/bzycj-2025-0072

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WANG Qianhui, QUAN Guan, LI Qinghua, YAO Pan, XU Shilang. Analysis of explosion resistance of the blast wall with negative Poisson’s ratio Structure[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2025-0072

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WANG Qianhui, QUAN Guan, LI Qinghua, YAO Pan, XU Shilang. Analysis of explosion resistance of the blast wall with negative Poisson’s ratio Structure[J]. Explosion And Shock Waves. doi: 10.11883/bzycj-2025-0072

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Analysis of explosion resistance of the blast wall with negative Poisson’s ratio Structure

doi: 10.11883/bzycj-2025-0072

Institute of Advanced Engineering Structures, Zhejing University, Hangzhou 310058, Zhejiang, China

Received Date: 2025-03-10
Rev Recd Date: 2025-05-13

Available Online: 2025-05-14

Abstract

Abstract

In order to improve the explosion resistance of the blast wall, it is proposed to combine the negative Poisson’s ratio structure with ultra-high toughness cementitious composites (UHTCC), and through a combination of the explosion experiment and numerical simulation, the anti-explosive property of the negative Poisson’s ratio slab has been studied, in order to prove the superiority of the anti-explosive properties of the negative Poisson’s ratio UHTCC slab. Firstly, the construction of a negative Poisson’s ratio structural slab was realized by using concrete 3D printing technology and optimizing the printing path, which verified the constructability of the negative Poisson’s ratio structural slab and the negative Poisson’s slab was subjected to a contact explosion test. Using LS-DYNA software, a finite element model of fluid-solid coupling was established in accordance with the explosion test conditions and the finite element model was verified by comparison of the slab damage pattern of the contact explosion test and the slab damage pattern of the simulation. On this basis, the finite element model which has been verified was used to simulate and analyze the effects of different materials of slabs(concrete and UHTCC), different structures of slabs(negative Poisson’s ratio structure, positive Poisson’s ratio structure and solid structure), different cell concave angles and different solid layer thickness ratios on the anti-explosive properties of the negative Poisson’s structural slab under contact explosion. By comparing the slab damage patterns and the ability of energy absorption which was determined by the value of the air overpressure behind the slabs, the design of a negative Poisson’s ratio structure target plate with the best anti-explosive properties was obtained. The results show that: (1) Due to the high toughness, explosion resistance of UHTCC slabs is significantly better than the concrete slabs.The UHTCC slabs all remained intact and the concrete target slabs are all penetrated. (2) Negative Poisson’s ratio slab has the best ability to absorb energy during three kinds of structures, while the solid slab is more able to maintain the structural integrity. (3) When the negative Poisson’s ratio of the cell concave angle is 61°, the structure has optimal explosion resistance, and smaller and larger angle both reduce the explosion resistance of structure. (4) When the thickness of the negative Poisson’s ratio structure is too large as a proportion of the total thickness, the slab is severely damaged. Increasing the solid layer thickness of the backburst surface of the slab or increasing the solid layer thickness of the explosion-facing surface and the backburst surface at the same time is conducive to weakening of the blast shock wave and improving structural integrity. This study confirmed the superiority of the explosion resistance of negative Poisson’s ratio UHTCC slab, and provides a theoretical basis for the design of blast walls based on negative Poisson’s ratio structure.
- negative Poisson’s ratio structure,
- ultra-high toughness cementitious composites,
- explosive load

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References(29)

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