Study of the explosion process in a small scale experiment—structural loading

Zyskowski, Adam; Sochet, Isabelle; Mavrot, Guy; Bailly, Patrice; Renard, J.

doi:10.1016/j.jlp.2004.05.003

Cited by 42 publications

(17 citation statements)

References 4 publications

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“…The approach is more complex, and was mostly investigated by using numerical tools. Among others, numerical codes, such as AUTODYN [30], LS-DYNA [11], EUROPLEXUS [17], CONWEP [23] or self-developed CFD (computational uid dynamics) codes as used by [2], require substantial computer resources to provide realistic simulations. In the dierent tunnel studies, many authors have focused on the mechanical eects of an explosion on the structure of the tunnels whereas a few have presented the behavior of the blast wave in the tunnel.…”

Section: Introductionmentioning

confidence: 99%

Numerical and reduced-scale experimental investigation of blast wave shape in underground transportation infrastructure

Pennetier

William-Louis

Langlet

2015

Process Safety and Environmental Protection

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When an explosion occurs in a tunnel, the study of the blast wave quickly becomes complicated, owing to the multiple propagation patterns of the blast wave (Incident wave, regular and Mach reections) and to the geometrical conditions. Considering this problem, two patterns can be revealed. Near the explosive, the well known freeeld pressure wave can be observed. After multiple reections on the tunnel's walls, this overpressure behaves like a one-dimensional (1D) wave. One aim of this paper is to determine the position of this transition spherical-to-planar wave propagation in a tunnel using both numerical and reduced-scale experiments, and thereby validate the dedicated law established in a previous work.For this purpose, a detonation of TNT in a tunnel with a cross-section of up to 55 m 2 is considered. Results show good agreement between the numerical simulations and experiments. The transition zone between the three-dimensional (3D) and the 1D wave is well detected. An application to a simplied subway station is also investigated which shows that signicant planar waves can be transmitted to the neighboring stations via the junction tunnels.

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Section: Introductionmentioning

confidence: 99%

Numerical and reduced-scale experimental investigation of blast wave shape in underground transportation infrastructure

Pennetier

William-Louis

Langlet

2015

Process Safety and Environmental Protection

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“…In order to explore the actual characteristics of confined explosion and validate the accuracy of numerical methods, experimental tests were carried out by researchers [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Numerical Method for Predicting the Blast Wave in Partially Confined Chamber

Kong

Cheng

et al. 2018

Mathematical Problems in Engineering

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Blast waves generated by cylindrical TNT explosives in partially confined chamber were studied numerically and experimentally. Based on the classical fifth-order weighted essentially nonoscillatory finite difference schemes (fifth-order WENO schemes), the 1D, 2D, and 3D codes for predicting the evolution of shock waves were developed. A variety of benchmark-test problems, including shock tube problem, interacting blast wave, shock entropy wave interaction, and double Mach reflection, were studied. Experimental tests of explosion events in a partially confined chamber were conducted. Then, the 3D code was employed to predict the overpressure-time histories of certain points of chamber walls. Through comparing, a good agreement between numerical prediction and experimental results was achieved. The studies in this paper provide a reliable means to predict the blast load in confined space.

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“…Although a large number of different structures have been used in industry [2], the conventional cords are mainly used for energy transfer and the cord itself does not need to provide sufficient energy for explosion. Therefore, it is not applicable for the cases where the cord is required to release impulse energies in a specific direction during explosion [3]. On the other hand, the linear shaped charges are able to provide explosion energy along a specific direction, but the size and the function of shaped charges are not suitable for thin and long tubes to form a complex profile during explosion [4].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of Sn–Cu alloys for detonating and explosive cords

Liu

Grechcini³

et al. 2017

Materials Science and Technology

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In order to develop alloys as the substitute of Pb-based materials for shielding materials in detonating and explosive cords, the materials requirement was analyzed and Sn-Cu based alloys were selected as candidates for this purpose. Four alloys including Sn-0.3wt.%Cu, Sn-0.5wt.%Cu, Sn-0.7wt.%Cu, and Sn-1.0wt.%Cu were processed from melting, casting, rolling, and annealing. The microstructure and mechanical properties of the alloys were investigated under as-cast, as-rolled and as-annealed conditions. The results confirmed that Sn-Cu based alloys are the appropriate substitute of Pb-based alloys for the application of detonating and explosive cords. The advantages of Sn-Cu alloys include resource abundant, low materials cost, non-toxicity for health and environment, relatively high density for supplying sufficient impulse energy and momentum for penetration, acceptable mechanical properties, and easy in melting, casting, extrusion, rolling and drawings. The microstructure of hypoeutectic Sn-Cu alloys was characterized by Sn-Cu solution and Sn-Cu6Sn5 eutectic phase. The annealing heat treatment was not able to modify the microstructure. The Sn-Cu based alloys with 0.3 to 1.0wt.%Cu offered the yield strength from 26.1 to 50.8MPa, ultimate tensile strength from 30.1 to 51.5MPa and elongation from 87.5 to 56.0%, which were comparable with the mechanical properties of the currently used Pb-based alloys. More importantly, Sn-Cu alloys exhibited strain softening under tensile stress, which was critically beneficial to the shielding manufacture and subsequent processing after assembly with high-energy explosive materials.

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Study of the explosion process in a small scale experiment—structural loading

Cited by 42 publications

References 4 publications

Numerical and reduced-scale experimental investigation of blast wave shape in underground transportation infrastructure

Numerical and reduced-scale experimental investigation of blast wave shape in underground transportation infrastructure

Numerical Method for Predicting the Blast Wave in Partially Confined Chamber

Microstructure and mechanical properties of Sn–Cu alloys for detonating and explosive cords

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