Numerical investigation on attenuation of stress waves in concrete induced by cylindrical cased charge explosion

YANG Yaozong; KONG Xiangzhen; FANG Qin; HONG Zhijie; GAO Chu

doi:10.11883/bzycj-2023-0342

Volume 44 Issue 11

Nov. 2024

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YANG Yaozong, KONG Xiangzhen, FANG Qin, HONG Zhijie, GAO Chu. Numerical investigation on attenuation of stress waves in concrete induced by cylindrical cased charge explosion[J]. Explosion And Shock Waves, 2024, 44(11): 112202. doi: 10.11883/bzycj-2023-0342

Citation:

YANG Yaozong, KONG Xiangzhen, FANG Qin, HONG Zhijie, GAO Chu. Numerical investigation on attenuation of stress waves in concrete induced by cylindrical cased charge explosion[J]. Explosion And Shock Waves, 2024, 44(11): 112202. doi: 10.11883/bzycj-2023-0342

Citation:

YANG Yaozong, KONG Xiangzhen, FANG Qin, HONG Zhijie, GAO Chu. Numerical investigation on attenuation of stress waves in concrete induced by cylindrical cased charge explosion[J]. Explosion And Shock Waves, 2024, 44(11): 112202. doi: 10.11883/bzycj-2023-0342

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Numerical investigation on attenuation of stress waves in concrete induced by cylindrical cased charge explosion

doi: 10.11883/bzycj-2023-0342

State Key Laboratory of Disaster Prevention & Mitigation of Explosion & Impact, PLA Army Engineering University, Nanjing 210007, Jiangsu, China

Received Date: 2023-09-15
Rev Recd Date: 2024-05-15

Available Online: 2024-05-16

Publish Date: 2024-11-15

Abstract

Abstract

Based on the Kong-Fang concrete material model and the multi-material arbitrary Lagrangian-Eulerian (MM-ALE) algorithm available in the LS-DYNA, the attenuation law of stress waves in CF120 concrete subjected to cylindrical cased charge explosion was numerically investigated in this paper. Firstly, the numerical algorithm and material model parameters were validated against two sets of cylindrical charge explosion tests. Then a series of fully enclosed and partially buried cylindrical charge explosion numerical models were established, in which different aspect ratios, shell thicknesses, and charge buried depths were considered to analyze the influence of charge shape and shell thickness on stress waves in concrete. Finally, an empirical formula for peak stress of compression wave in concrete induced by cylindrical cased charge explosion was presented based on curve-fitting the numerical data. Numerical results demonstrate that the larger the aspect ratio, the higher the peak stress in the near region, while the opposite law takes on in the far region. Besides, increasing the shell thickness will make the peak stress higher, but there is a threshold. The influence of charge shape, shell thickness, and charge buried depth on the peak stress can be quantified by defining the length-diameter ratio, thickness-diameter ratio, and coupling factor of peak stress. The empirical formula for peak stress of compression wave in concrete is valid for varied aspect ratio, shell thickness, and charge buried depth, which can provide a reliable estimation the peak stress induced by cylindrical cased charge explosion.
- concrete,
- cylindrical cased charge,
- explosion wave,
- peak stress

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References(34)

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