Near Field Underwater Explosion Response of Polyurea Coated Composite Plates

LeBlanc, James; Shillings, C.; Gauch, Erin; Livolsi, F.; Shukla, Arun

doi:10.1007/s11340-015-0071-8

Cited by 38 publications

(19 citation statements)

References 18 publications

(20 reference statements)

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“…Whilst this information may enable researchers to develop relationships between basic parameters, it is often more desirable for validation of numerical modelling approaches to have a more detailed description of the transient displacement profile of the plate. Digital image correlation (DIC) was first introduced in 1983 [28] and has recently been used to more accurately study fullfield transient deformations of blast loaded plates [29][30][31][32][33][34][35][36][37][38][39][40][41][42].…”

Section: Literature Reviewmentioning

confidence: 99%

Experimental Measurement of Specific Impulse Distribution and Transient Deformation of Plates Subjected to Near-Field Explosive Blasts

et al. 2018

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The shock wave generated from a high explosive detonation can cause significant damage to any objects that it encounters, particularly those objects located close to the source of the explosion. Understanding blast wave development and accurately quantifying its effect on structural systems remains a considerable challenge to the scientific community. This paper presents a comprehensive experimental study into the loading acting on, and subsequent deformation of, targets subjected to nearfield explosive detonations. Two experimental test series were conducted at the University of Sheffield (UoS), UK, and the University of Cape Town (UCT), South Africa, where blast load distributions using Hopkinson pressure bars and dynamic target deflections using digital image correlation were measured respectively. It is shown through conservation of momentum and Hopkinson-Cranz scaling that initial plate velocity profiles are directly proportional to the imparted impulse distribution, and that spatial variations in loading as a result of surface instabilities in the expanding detonation product cloud are significant enough to influence the transient displacement profile of a blast loaded plate.

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Section: Literature Reviewmentioning

confidence: 99%

Experimental Measurement of Specific Impulse Distribution and Transient Deformation of Plates Subjected to Near-Field Explosive Blasts

et al. 2018

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“…A computational finite element analysis (FEA) model similar to previous work (Leblanc et al 2015) was created with the LS-DYNA code from the Livermore Software Technology Corp. The model uses a CEL formulation that is capable of capturing the fluid-structure interaction between the fluid and composite plate as well as an accurate representation of the explosive's detonation.…”

Section: Numerical Modelmentioning

confidence: 99%

“…The explosive's physical and JWL EOS parameters are provided in Table 3. More details about EOS models and assumptions can be found in previous work (Leblanc et al 2015). The composite plate is modeled using 3D continuum solid elements through the thickness of the plate.…”

Section: Numerical Modelmentioning

confidence: 99%

“…Recently, there has been a study that analyzes the shock response of weathered composites plates within an air medium (Shillings et al 2017). Moreover, many experimental and numerical studies analyze the dynamic response of non-weathered composite plates subjected to underwater explosives (Batra and Hassan 2007;Wei and Espinosa 2013;Shukla 2010, 2013;Leblanc et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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Underwater nearfield blast performance of hydrothermally degraded carbon–epoxy composite structures

Matos

Javier

LeBlanc

et al. 2018

Multiscale and Multidiscip. Model. Exp. and Des.

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An experimental and computational study was conducted to evaluate the dynamic response of weathered biaxial composite plates subjected to near-field explosive/blast loadings. Naval structures are subjected to aggressive marine environments during their service life that can significantly degrade their performance over time. The composite materials in this study are carbonepoxy composite plates with [0, 90]s and [45, − 45]s layups. The composites were aged rapidly through submersion in 65 • C seawater for 35 and 70 days, which through Arrhenius' methodology, simulates approximately 10 and 20 years of operating conditions, respectively. Experiments were performed by clamping the composite plates to an air-backed enclosure inside an underwater blast facility. During the experiments, an RP-503 explosive was submerged, behind the composite specimen, and detonated. Meanwhile, transducers measured the pressure emitted by the explosive, and three high-speed cameras captured the event. Two of the cameras were placed facing the specimen to measure full field displacement, velocities, and strains through a 3D digital image correlation analysis. The third high-speed camera was used to record the explosive's behavior and bubble-to-specimen interaction. Additional experiments were performed to obtain the non-weathered and weathered material properties as well as the residual strength post the blast experiments. Additionally, a coupled Eulerian-Lagrangian finite element simulation was conducted to complement the experimental findings. Results show that the diffusion of water into the composite material leads to a more prominent blast response as well as the degradation of mechanical properties, especially shear properties which are dominated by the epoxy matrix. Residual strength experiments also show a substantial decrease in the structural integrity post-blast loading for the weathered composites. Lastly, the numerical simulations showed substantial increase in maximum strains with relatively small decreases in mechanical stiffness. Hence, even past the saturation point, incremental changes in material properties can have a significant impact on mechanical performance.

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“…Moreover, the dynamic response of di®erent forms of storage tank under the implosion and explosion loads was studied. LeBlanc et al 15,16 used the TNT equivalent method for the numerical simulation of the shock load generated by underwater explosion and the e®ect of the presence of liquid on structural deformation. Also, studies have been conducted on load distribution and coupled response for other forms of container under explosion load measured by TNT equivalent.…”

Section: Introductionmentioning

confidence: 99%

Coupled Dynamic Analysis of Liquid Storage Tanks Under Implosion-Generated Overpressure

Ding

et al. 2019

Int. J. Str. Stab. Dyn.

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To deal with the effect of liquid storage on the distribution of implosion, a fluid–solid coupling model is built for the shared nodes of implosion in the liquid storage tank. The displacement compatibility and acceleration and speed coupling are achieved between the implosion field (gas, liquid) and liquid storage tank. First, using this model, the implosion-generated overpressure distribution and structural response under the working condition of half filled tank are obtained. The results show that the overpressure, displacement and stress are high on the shell near the liquid level. Then, the effects of both the TNT equivalent and liquid level on implosion in the liquid storage tank are studied. As the TNT equivalent increases, the maximum overpressure, displacement and stress on the shell near the liquid level increase. Consequently, the maximum overpressure and displacement on the shell near the liquid level exceed those at the roof-to-shell connection of the tank. In contrast, as the liquid level increases, the maximum stress and displacement first increase near the shell. After reaching the peaks near half filled level, they begin to decrease. Only when the liquid reaches a certain level, it can have an attenuating effect on the overpressure at the bottom-to-shell connection. However, if the liquid level continues to rise beyond a certain threshold, the attenuating effect is no longer prominent.

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Near Field Underwater Explosion Response of Polyurea Coated Composite Plates

Cited by 38 publications

References 18 publications

Experimental Measurement of Specific Impulse Distribution and Transient Deformation of Plates Subjected to Near-Field Explosive Blasts

Experimental Measurement of Specific Impulse Distribution and Transient Deformation of Plates Subjected to Near-Field Explosive Blasts

Underwater nearfield blast performance of hydrothermally degraded carbon–epoxy composite structures

Coupled Dynamic Analysis of Liquid Storage Tanks Under Implosion-Generated Overpressure

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