Experimental and numerical investigation of v-shape plates subjected to blast loadings

Hafizi, M. N.; Risby, M. S.; Umar, Sarehati; Sohaimi, Arif S.M.; Khalis, S.; Tan, Keai Sinn

doi:10.4314/jfas.v9i3s.18

Cited by 3 publications

(3 citation statements)

References 3 publications

(3 reference statements)

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“…This is important because the 140°–154° range is stated by Zhao et al (2014 (citing Genson, 2006, for support) to be the optimum internal angle for V-plates subjected to buried charge explosions. The sensitivity of the 150° V-plate configuration was later confirmed (Hafizi et al, 2017; Hazrati and Singh, 2016).…”

Section: Introductionmentioning

confidence: 85%

The effect of the bend radius on the impulse transfer characteristics of V-hulls: Numerical simulations

Langdon

Shekhar

2019

International Journal of Protective Structures

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A study was performed to investigate the effects of geometry on impulse transfer to V-plates subjected to localised air-blast loading. The V-plates were designed to be 1:8 scale compared to the full-scale V-hulls used in landmine-protected vehicles. Simulations were performed using LS-DYNA and validated using results from blast experiments on scaled rigid V-plated structures of varying internal angle. The validated numerical models were then used to ascertain the influence of including the clamp, varying the stand-off distance, internal angle and V-tip radius on impulse transfer. The simulations showed that, in general, the impulse increased as V-tip radius increased. For the 90° and 120° V-plates, the impulse transferred was observed to plateau for bend radii greater than 160 mm. The increase in impulse was attributed to changes in the spatial and temporal load distribution due to the higher V-tip radius. There was no significant variation in the pressure distributions for larger bend radii (above 160 mm). For both the 90° and 120° V-plates, a dip in impulse was observed when the V-tip radii was between 0 and 20 mm. This was caused by reduced peak pressures and an increase in gas flow. Fixing the clearance height and increasing the V-tip radius (and therefore the stand-off distance) had no discernible effect on impulse transfer. However, it was shown to increase the arrival time and load duration, while decreasing the peak total force.

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Section: Introductionmentioning

confidence: 85%

The effect of the bend radius on the impulse transfer characteristics of V-hulls: Numerical simulations

Langdon

Shekhar

2019

International Journal of Protective Structures

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“…If a higher-order damage function is desired, interpolation values can be obtained with Taguchi-like approaches after the analyses at intermediate velocity values, and the results obtained from them can be added. The explosion protection performance of the structure protected with a single Vshaped plate was investigated in (Hafizi et al 2017) and (Behera et al 2021). In an earlier study (Panowicz et al 2013), the protection of the V-shaped lower guard plate from land mines was investigated.…”

Section: Comparison Between Fea and Experimental Resultsmentioning

confidence: 99%

“…For example, Shou-hong and Zhen-hua (2011) investigated deflector plate designs for the protection of truck cabins from explosions. Hafizi et al (2017) experimentally and numerically investigated the behavior of a V-shaped deflector design against bomb explosions. Clayton (2015) numerically investigated the ballistic behavior of a composite sheet consisting of ceramic-polymer-metal layers.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental investigation of the ballistic performance of the armor structure with in-layer deflector against bullets

ÇALIŞKAN

Camcı

Fındık

2022

Lat. Am. j. solids struct.

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This is a study to investigate ballistics performance of armor structures with in-layer deflector against projectiles. For this purpose, the armor structure, which consists of a v-cross section sheet metal array covered with aluminum and steel plates, has been designed and optimized. Firstly, numerical simulations were studied using the finite-element method (FEM). The ANSYS LS-DYNA FE software is used for the ballistic analysis. The Johnson-Cook constitutive equation and damage model were used to model the behavior of metal armors under impact in the ballistic simulations. In the next step, experimental studies were carried out. Penetration depths were measured; including the magnitude of plate bending in front of the target plate and bulging behind it. Comparisons between the results of the finite element analysis (FEA) and the tests reveal that a bullet with a velocity of 868 m/s penetrated the target, but the target could not be penetrated at a firing speed of 631 m/s Furthermore the experimental and numerical results were in good agreement.

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Design optimization and structural integrity simulation of aluminum foam sandwich construction for armored vehicle protection

Pratomo

Santosa

Gunawan

et al. 2021

Composite Structures

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Experimental and numerical investigation of v-shape plates subjected to blast loadings

Cited by 3 publications

References 3 publications

The effect of the bend radius on the impulse transfer characteristics of V-hulls: Numerical simulations

The effect of the bend radius on the impulse transfer characteristics of V-hulls: Numerical simulations

Numerical and experimental investigation of the ballistic performance of the armor structure with in-layer deflector against bullets

Design optimization and structural integrity simulation of aluminum foam sandwich construction for armored vehicle protection

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