Field Tests of Cementitious Materials Suitable for Force Protection and Critical Infrastructure Protection

Štoller, Jiří; Zezulová, Eva

doi:10.1109/miltechs.2019.8870067

Cited by 8 publications

(6 citation statements)

References 37 publications

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“…Various research on blast wave propagation was conducted by Stoller in [5,6] and resistance of structures against such loads was researched in [7][8][9]. A field test that focused on overpressure measurements of various types of explosives was described in [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Dependency of the Blast Wave Pressure on the Amount of Used Booster

2021

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Most of the damage caused by an explosion is caused by a pressure effect. The magnitude of the pressure generated by the explosion is influenced by the external characteristics of the environment (surrounding objects, their arrangement, geometry, etc.) and internal characteristics (type of explosive, type of charge, booster and others). An effective combination of internal factors creates a symmetry that results in the highest possible value of pressure generated by the charge explosion. The paper focuses on the influence of the booster reaction on this symmetry. The scope of the paper is to understand the dependency of the blast wave pressure on the amount of used blaster to increase the efficacy of explosions on the environment and structures to increase the protection of affected structures. The open-air field tests were conducted using different types of explosives: trinitrotoluene and three different types of industrially made ANFO explosives (pure ammonium nitrate and fuel oil, ammonium nitrate and fuel oil plus aluminum powder, ammonium nitrate and fuel oil mixed with trinitrotoluene). The obtained data were compared with the analytical approach for setting the generated maximal pressure on the front of the blast wave.

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Section: Introductionmentioning

confidence: 99%

Dependency of the Blast Wave Pressure on the Amount of Used Booster

2021

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“…On the side of the structure, the final result typically takes the form of a complex mathematical problem that must account for high strain loading effects and dynamic nonlinearities. A number of literature studies can be found on the blast performance analysis of various constructional systems and materials, including metal sandwich panels [12][13][14][15][16][17][18][19][20][21], aluminium panels [22][23][24][25] and steel structures [26][27][28][29], reinforced concrete (RC) and RC-strengthened slabs and components [30][31][32][33][34][35][36][37][38][39], and glass assemblies and systems [40][41][42][43].…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of the Blast Wave Propagation due to Various Explosive Charges

Figuli

Čekerevac

Bedon

et al. 2020

Advances in Civil Engineering

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Blast events and scenarios, as known, represent extreme phenomena that may result in catastrophic consequences, both for humans and structures. Accordingly, for engineering applications, the reliable description of expected blast waves is a crucial step of the overall design process. Compared to ideal theoretical formulations, however, real explosive events can be strongly sensitive to a multitude of parameters and first of all to the basic features (size, type, shape, etc.) of the charge. In this regard, several advanced computer codes can be used in support of design and research developments. Besides, the input parameters and solving assumptions of refined numerical methods are often available and calibrated in the literature for specific configurations only. In this paper, with the support of the ANSYS Autodyn program, special care is dedicated to the numerical analysis of the blast wave propagation in the air due to several charges. Five different explosives are taken into account in this study, including RDX, DAP-2, DAP-E, Polonit-V, and homemade ANFO. The effects of different mixtures are thus emphasized in terms of the predicted blast wave, as a function of a given control point, direction, explosive mass, and composition. As shown, relatively scattered peak pressure estimates are collected for a given explosive. Comparative results are hence proposed towards selected experimental data of the literature, as well as based on simple analytical predictions. The collected overpressure peak values are thus discussed for the selected explosive charges.

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“…Determination of the sample size is one of the critical moments of testing. It is necessary to make decision whether the samples will be small sized 500x500x50 mm larger size 1000x1000x50 (100, 150 mm) [4,5,6,7,8,10], or large format example 1500x6000x300 mm [9]. Furthermore, it is necessary to read a large amount of literature relating to explosives properties and their effects on various structures such as [11, 12, 13 and 14].…”

Section: Introductionmentioning

confidence: 99%