Explosive driven shock tube loading of aluminium plates: experimental study

Louar, Mohamed Abderaouf; Belkassem, Bachir; Ousji, Hamza; Spranghers, Ken; Kakogiannis, Dimitrios; Pyl, Lincy; Vantomme, John

doi:10.1016/j.ijimpeng.2015.07.013

Cited by 39 publications

(29 citation statements)

References 20 publications

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“…Louar et al [52] conducted an experimental study into the loading of thin square aluminium plates, through an explosively driven shock tube (EDST) and free air blast. Initially, the authors used a 15 mm thick plate to determine the reflected pressure in the EDST, to validate the method of producing a shock loading.…”

Section: D Dic In Blast and Shock Loadingmentioning

confidence: 99%

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Visual Methods to Assess Strain Fields in Armour Materials Subjected to Dynamic Deformation—A Review

Ellis

Hazell

2020

Applied Sciences

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When impacted by a projectile, ballistic protection undergoes very large strain rates over very short periods of time. During these impact events, materials will undergo a very short region of elastic deformation, before undergoing significant plastic deformation. Due to the high levels of plastic deformation the samples undergo, strain gauges and other embedded sensors are often ineffective or become damaged before useful data can be obtained. Three-dimensional digital image correlation (3D DIC) is a non-invasive measurement method that uses two high-speed cameras, offset from each other by 15–45° to observe a speckle pattern on the sample material. As the material, and by extension the speckle pattern, deforms, the images taken throughout the deformation can be compared in sequence, to determine the motion and deformation of the sample. Recent advances in camera technology have allowed for frame rates in the hundreds of thousands of frames per-second, allowing for the measurement of very high-strain rate impact events. This paper will describe the premise of 3D DIC and provide a review of the current applications and research into high-speed impact testing using 3D DIC.

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Section: D Dic In Blast and Shock Loadingmentioning

confidence: 99%

“…In comparison, the free air blast causes the stress/strain waves to be generated at the edges and propagate towards the centre. In addition, the EDST provided better reproducibility in terms of distribution, also providing better symmetry, and magnitude of the loading [52].…”

Section: D Dic In Blast and Shock Loadingmentioning

confidence: 99%

Visual Methods to Assess Strain Fields in Armour Materials Subjected to Dynamic Deformation—A Review

Ellis

Hazell

2020

Applied Sciences

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“…In recent years, shock tube has been used to study the dynamic response of thin metallic plates subjected to varying levels of shock loading [12]. Shock tube, driven with explosives, has also been employed as a device to create a shock loading [13]. Diaphragmless shock tube was considered to study the response of the copper, brass, and aluminum plates [14].…”

Section: International Journal Of Aerospace Engineeringmentioning

confidence: 99%

Shock Tube as an Impulsive Application Device

Nanda

Agarwal

Kulkarni

et al. 2017

International Journal of Aerospace Engineering

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Current investigations solely focus on application of an impulse facility in diverse area of high-speed aerodynamics and structural mechanics. Shock tube, the fundamental impulse facility, is specially designed and calibrated for present objectives. Force measurement experiments are performed on a hemispherical test model integrated with the stress wave force balance. Similar test model is considered for heat transfer measurements using coaxial thermocouple. Force and heat transfer experiments demonstrated that the strain gauge and thermocouple have lag time of 11.5 and 9 microseconds, respectively. Response time of these sensors in measuring the peak load is also measured successfully using shock tube facility. As an outcome, these sensors are found to be suitable for impulse testing. Lastly, the response of aluminum plates subjected to impulsive loading is analyzed by measuring the in-plane strain produced during deformation. Thus, possibility of forming tests in shock is also confirmed.

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“…One of the main difficulties related to gas-driven shock tubes is the proper design and modeling of the fracture of diaphragms opening the flow. In explosive-driven shock tubes [10], a blast wave is obtained by an explosion of a charge located in front of the tube. The wave propagates inside the tube, creating a localized planar pressure front.…”

Section: Introductionmentioning

confidence: 99%

“…Various structural components have been already tested and analyzed by means of the EDST technique. The results of a series of tests carried out by means of an EDST are discussed in [10], where the test conditions are analyzed with regard to pressure, load impulse, wave planarity and repeatability of loadings. In this case, the EDST is used to generate a blast loading on fully clamped square aluminum plates.…”

Section: Introductionmentioning

confidence: 99%

Blast-Induced Compression of a Thin-Walled Aluminum Honeycomb Structure—Experiment and Modeling

Stanczak

Frąś

Blanc

et al. 2019

Metals

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The presented discussion concerns the behavior of a thin-walled hexagonal aluminum honeycomb structure subjected to blast loading. The shock wave affecting the structure is generated by detonation of the C4 charge in an explosive-driven shock tube (EDST). The EDST set-up is an instrumented device that makes it possible to study blast effects in more stable and repeatable conditions than those obtained in a free-air detonation. The formation of folds characteristic of a honeycomb deformation in the axial compression distributes the initial loading over a time period, which is considered as an efficient method of energy dissipation. The test configuration is modeled in the Ls-Dyna explicit code, which enables analysis of the mechanisms of energy absorption that accompanies structural deformation under a blast loading. The conclusions reached in the performed experimental and numerical investigation can be applied to the modeling and optimization of cellular structures used to mitigate blast loadings.

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Explosive driven shock tube loading of aluminium plates: experimental study

Cited by 39 publications

References 20 publications

Visual Methods to Assess Strain Fields in Armour Materials Subjected to Dynamic Deformation—A Review

Visual Methods to Assess Strain Fields in Armour Materials Subjected to Dynamic Deformation—A Review

Shock Tube as an Impulsive Application Device

Blast-Induced Compression of a Thin-Walled Aluminum Honeycomb Structure—Experiment and Modeling

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