General Considerations for Blast‐Resistant Design

Dusenberry, Donald O.

doi:10.1002/9780470549070.ch1

Cited by 12 publications

(16 citation statements)

References 3 publications

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“…Spherical Nylon casing filled with 1 kg of liquid Nitromethane (NM) was used as a high explosive spherical charge to overcome the practical difficulties associated with manufacturing spherical TNT charges with central detonation. NM explosives were selected due to its advantages over the safety, handling, and well-formed shock front [49]. The 1 kg NM spherical charge was suspended by strings over the centre of the steel plates to achieve the required standoff distance.…”

Section: Specimen Preparation and Experimental Set-upsmentioning

confidence: 99%

Close-in blast resistance of large-scale auxetic re-entrant honeycomb sandwich panels

Kalubadanage

Remennikov

Ngo

et al. 2020

Jnl of Sandwich Structures & Materials

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The protection of critical infrastructure, including government buildings, airports, religious buildings, military buildings and military vehicles, which are at risk to blast loads, has become important due to increasing terrorist activities in recent years. Sacrificial cladding systems based on negative Poisson’s ratio core topologies have recently received more attention as a protective technology due to its excellent energy absorption capability. In this study, field blast tests were performed on metallic re-entrant honeycomb-cored sacrificial cladding systems as protective structures for steel plate structures. This study focused on the near-field blast loading conditions where liquid Nitromethane (NM) spherical charges were detonated in close proximity to the main structure. Two 6 mm thick mild steel plates and two steel plates protected with re-entrant honeycomb-cored sacrificial cladding systems were among the specimens tested. The proposed auxetic cladding system was fabricated from aluminium sheets using a novel in-house built folding machine. Numerical simulations were conducted utilising LS-DYNA software and the Blast Impact Impulse Model (BIIM). The results obtained from the numerical simulations are in good agreement with the experimental results. It was found that the deformation pattern of the sacrificial auxetic cladding system varies with the intensity of the blast loading, and there is a limit at which the proposed protective system ceases to effectively absorb the applied blast loading. The variation of negative Poisson’s ratio of the system with blast loading was studied. It was found that the auxetic cladding system could become a solid projectile leading to damage amplification for very close-range blast loads due to rapid densification of the auxetic core. The proposed cladding systems with narrow re-entrant angles performed well under blast loads due to relatively low stiffness of the panels. Finally, the optimisation study was performed for the protective system. Overall, the experimental and numerical results assure that auxetic-based cladding systems are suitable for applications requiring blast protection such as armoured vehicles and critical physical infrastructure but need to be carefully designed for the given blast threat to prevent overloading of the protected structures.

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Section: Specimen Preparation and Experimental Set-upsmentioning

confidence: 99%

Close-in blast resistance of large-scale auxetic re-entrant honeycomb sandwich panels

Kalubadanage

Remennikov

Ngo

et al. 2020

Jnl of Sandwich Structures & Materials

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“…The support rotate angle of 2° was adopted as the failure criterion for bending failure mode of RC beam columns according to Dusenberry (2010). The support shear slip of 0.6 mm was adopted as the failure criterion for shear failure mode according to Dragos and Wu (2014) and Low and Hao (2002).…”

Section: The Simplified Damage Process Of Rc Component Under Blast Loadmentioning

confidence: 99%

Non-dimensional pressure–impulse diagrams for blast-loaded reinforced concrete beam columns referred to different failure modes

Zhang

Chen

et al. 2018

Advances in Structural Engineering

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The pressure–impulse diagram is commonly used to assess the damage level of structural components under explosion. Non-dimensional pressure–impulse diagrams referred to different failure modes was obtained using a new methodology in this article. Nine non-dimensional key parameters were first proposed on basis of the Euler beam theory. Considering the shear failure, an elastic–plastic method to calculate the dynamic response of reinforced concrete beam columns was then proposed for different failure modes. Three failure categories, for example, bending failure, shear failure, and combined shear and bending failure, were considered. The threshold between the three failure modes was determined using non-dimensional pressure–impulse curves. A systematic parametric study was conducted to investigate the effects of different non-dimensional parameters on the dynamic response and the failure modes of reinforced concrete beam column. Parametric study shows that the nine non-dimensional key parameters are sufficient to calculate the dynamic response of reinforced concrete beam columns. Moreover, present study shows that the tangent modulus of direct shear stress–slip relation has a great influence on the failure modes. Beam columns with a smaller tangent modulus are more likely to generate combined shear and bending failure mode.

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“…Manufacturing of perfectly spherical charges from TNT or other solid explosives is not a trivial task. To overcome difficulties with manufacturing spherical charges, it was suggested [10] to use sensitized Nitromethane (NM) as the high explosive material considering that its TNT equivalency is 1.0 as given in [11].…”

Section: Explosive Chargesmentioning

confidence: 99%

“…Nitromethane is relatively insensitive and must be initiated by a strong ignition source. The shock front produced by Nitromethane is well formed and produces blast loads with approximately 100% TNT equivalency [11].…”

Section: Explosive Chargesmentioning

confidence: 99%

Experimental investigation and simplified modeling of response of steel plates subjected to close-in blast loading from spherical liquid explosive charges

Remennikov

Ngo

Mohotti

et al. 2017

International Journal of Impact Engineering

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General Considerations for Blast‐Resistant Design

Cited by 12 publications

References 3 publications

Close-in blast resistance of large-scale auxetic re-entrant honeycomb sandwich panels

Close-in blast resistance of large-scale auxetic re-entrant honeycomb sandwich panels

Non-dimensional pressure–impulse diagrams for blast-loaded reinforced concrete beam columns referred to different failure modes

Experimental investigation and simplified modeling of response of steel plates subjected to close-in blast loading from spherical liquid explosive charges

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