Transient response of steel plates subjected to close proximity explosive detonations in air

Curry, R.J.; Langdon, G.S.

doi:10.1016/j.ijimpeng.2016.12.004

Cited by 49 publications

(52 citation statements)

References 15 publications

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“…membrane or combine bending and membrane). In the second category, the results of each pattern of motion were compared against the available experimental data on the effect of stand-off on blast phenomenon by Jacob et al [57], using mild steel plates, as well as those of Langdon et al [58], [59] on blast protection armour steel plates. In addition, the numerical results of [60] are investigated for a comparative study.…”

Section: Validations Of the Theoretical Modelsmentioning

confidence: 99%

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Inelastic dynamic response of square membranes subjected to localised blast loading

Mehreganian

Fallah

Louca

2018

International Journal of Mechanical Sciences

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Extensive shock and highly localised blast waves generated by detonation of near field explosives (such as Improvised Explosive Devices (IED's)) are catastrophic to structures and detrimental to humans and may result in injury or death, penetration and progressive damage, or perforation through the structure and collapse. Mitigating the effects of such waves is paramount in various aspects of design in Structural, Aeronautical, and Defense engineering, as well as being useful in Forensic Sciences. A theoretical model is presented here to predict the large inelastic deformation of ductile thin square membranes induced by a generic short duration localised pressure pulse load. The pulse loading was idealised as a multiplicative decomposition of spatial and temporal functions. The spatial part is a piecewise continuous function of axisymmetric distribution of constant pressure over a central zone of the target, then exponentially decaying beyond this zone. The temporal part may assume various shapes. Using the constitutive framework of limit analysis and incorporating the influence of finite displacements, two patterns of kinematically admissible, time dependent velocity profiles were investigated. These patterns included stationery and moving plastic hinges. The results were investigated in two cases: once with the interaction between bending moment and membrane forces retained in the analyses, and then when the response was solely governed by membrane forces. For blast loads of high magnitude, the pressure was replaced by an impulsive velocity and the results were cast as functions of dimensionless form of initial kinetic energy. The theoretical results corroborated well with the available experimental results on high strength ARMOX steel, a class of steel impervious to the phenomenon of rate sensitivity.

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Section: Validations Of the Theoretical Modelsmentioning

confidence: 99%

“…Both studies employed PE4 disc explosive to generate the blast wave pressure. Details of these studies have been discussed elsewhere [58], [59], thus only the results of interest are presented here for validations.…”

Section: Validations Of the Theoretical Modelsmentioning

confidence: 99%

Inelastic dynamic response of square membranes subjected to localised blast loading

Mehreganian

Fallah

Louca

2018

International Journal of Mechanical Sciences

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“…'s [33], and [35] in Blast Impact and Survivability Research Unit at the University of Cape Town the details of which could be found in the literature, however; a brief description of the tests is given here. Air blast load was generated by the blast chamber facility through detonating disk explosives of PE4 using MA2A3 electrical detonator, which was in turn mounted on a polystyrene bridge to provide the desired stand-off by varying the lengths of bridge legs (Fig.…”

Section: Description Of Experimental Setupmentioning

confidence: 99%

“…Full description of the experimental setup is given in Ref. 's [7], and [35], including experimental tests with various charge masses and with a horizontal pendulum. Table 2 summarises the experimental tests selected for this study.…”

Section: Description Of Experimental Setupmentioning

confidence: 99%

Response of Armour Steel Plates to localised Air Blast Load – A Dimensional Analysis

Fallah

Mehreganian

Boiger

et al. 2017

IJM

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“…As the existing finding's shown, structures subjected to unconfined and confined explosion bears different blast loads and their dynamic responses are different [1]. Under unconfined blast, the structure performs different dynamic response which hugely depends on the explosive source distance (i.e., close-in airblast [2], and faraway airblast), shield materials (i.e. thin aluminium, steel plates [3]) as well as the structure patterns.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Response Mechanism of Thin-Walled Metallic Defensive Structure from Explosion in Transportation

Yao¹,

Zhao²,

Zhang³

et al. 2020

Preprint

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Defensive structure is important in transportation field for kinds of intentional or unintentional explosion. Structures subjected to unconfined and confined explosion will bear different blast loads and their dynamic responses are different. The present work focus on the dynamic response mechanism of steel plate under unconfined and confined blast loads through both numerical and experimental studies. In the experiment, Digital Image Correlation (DIC) technique was applied to record and analyze the dynamic response process of large-scale field blast test. The DIC measured curve and the numerical calculated curves agrees well in both the trends and the peak values. Then, the dynamic response mechanism of steel plate under unconfined blast (UB) load and confined blast (CB) load were compared and discussed. Results show that the dynamic response of plate can be divided into three phases under both UB and CB loads, while with different mechanism. In phase I, plastic hinge starts from the center and moves to the boundary in UB condition, while in case of CB, plastic hinge occurs close to the boundary and moves in the opposite direction. In phase II, two plastic hinge lines propagates towards each other, and a platform exists between the boundary and the central area remains undeformed in UB condition, while in CB condition, larger deformation in peripheral region rather than central area produces.

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Transient response of steel plates subjected to close proximity explosive detonations in air

Cited by 49 publications

References 15 publications

Inelastic dynamic response of square membranes subjected to localised blast loading

Inelastic dynamic response of square membranes subjected to localised blast loading

Response of Armour Steel Plates to localised Air Blast Load – A Dimensional Analysis

Dynamic Response Mechanism of Thin-Walled Metallic Defensive Structure from Explosion in Transportation

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