Dynamic Deformation of Clamped Circular Plates Subjected to Confined Blast Loading

Chen, P. W.; Liu, H.; Ding, Yanfen; Guo, Baoqiao; Chen, J. J.; Liu, H. B.

doi:10.1111/str.12190

Cited by 11 publications

(5 citation statements)

References 32 publications

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“…Through mathematical contrasting the sub-images between deformed and un-deformed images, the deformation of the samples can be calculated [ 22 , 24 ]. It has been repeatedly used in Sutton et al [ 25 ], Yan et al [ 26 ], Chen et al [ 27 ] and White et al [ 22 ] to monitor the evolution of the shear strain in the deformation region in real-time during the deformation period. The strain field of the FHS specimen during the deformation process is calculated by 2D-DIC (VIC-2D.…”

Section: Materials and Experimental Techniquesmentioning

confidence: 99%

Dynamic Shear Deformation and Failure of Ti-6Al-4V and Ti-5Al-5Mo-5V-1Cr-1Fe Alloys

Ran

Chen

2018

Materials

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To study the dynamic shear deformation and failure properties of Ti-6Al-4V (Ti-64) alloy and Ti-5Al-5Mo-5V-1Cr-1Fe (Ti-55511) alloy, a series of forced shear tests on flat hat shaped (FHS) specimens for the two investigated materials was performed using a split Hopkinson pressure bar setup. The evolution of shear deformation was monitored by an ultra-high-speed camera (Kirana-05M). Localized shear band is induced in the two investigated materials under forced shear tests. Our results indicate that severe strain localization (adiabatic shear) is accompanied by a loss in the load carrying capacity, i.e., by a sudden drop in loading. Three distinct stages can be identified using a digital image correlation technique for accurate shear strain measurement. The microstructural analysis reveals that the dynamic failure mechanisms for Ti-64 and Ti-55511 alloys within the shear band are of a cohesive and adhesive nature, respectively.

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Section: Materials and Experimental Techniquesmentioning

confidence: 99%

Dynamic Shear Deformation and Failure of Ti-6Al-4V and Ti-5Al-5Mo-5V-1Cr-1Fe Alloys

Ran

Chen

2018

Materials

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“…Chen et al [55] examined the response of thin circular plates to confined explosions. The circular plates were made from ASTM C11000 copper, h62 brass or α-titanium alloy (Ti 50A).…”

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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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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“…These tests are performed in controlled conditions on targets having limited size and simple geometry. For instance, in (Anderson et al, 2011), flat and V-shaped steel plates have been tested against the detonation of cylindrical charges; in (Wang et al, 2017), a cylindrical charge of RDX is suspended above a sandwich panel with honeycomb core to test its response to the blast; circular plates are tested in (Chen et al, 2016) and steel-concrete slabs in (Zhao et al, 2019). These plates and panels are used as components to build blast resistant vehicles and structures (for instance, doors).…”

Section: Introductionmentioning

confidence: 99%

Shock qualification of low-cost blast resistant wheels by in field tests

Silvestri

Adele

Elisa

et al. 2022

International Journal of Protective Structures

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This paper presents the results obtained during an experimental campaign on blast resistant wheels designed for a low-cost demining machine, derived from an agricultural tractor. Such wheels must fulfil two requirements: first, they have to be able to retain their mechanical integrity in case of blast and still work after one or more explosions, in order to be able to drive the machine out of the minefield without human intervention; second, they must reduce as much as possible the amount of energy transferred to the vehicle, to protect the on-board equipment from the effect of the detonation of a landmine. One of the goals of the experimental activity was to compare two wheels characterized by different designs. Mechanical performance and capacity of the wheels to reduce the energy transferred to the vehicle have been assessed to verify whether the wheels were suitable for the task and to identify which wheel performs best. Physical integrity of both wheels was assessed by visual inspection after each explosion. To evaluate the energy transferred to the vehicle, a measurement of the potential energy transferred, by means of a ballistic pendulum, equipped with an encoder, was performed together with a triaxial acceleration measurement in correspondence of the wheel hub. The triaxial accelerometer measurement was then also used to assess the behaviour of the wheels mounted on the vehicle after tests on the ballistic pendulum. Wheel performances have been quantified using specific features and frequency domain functions, related to the damage induced by the vibration at the interface between the hub and the demining machine. The obtained results suggest that the heaviest wheel performs better both in terms of mechanical integrity and of shock response.

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Dynamic Deformation of Clamped Circular Plates Subjected to Confined Blast Loading

Cited by 11 publications

References 32 publications

Dynamic Shear Deformation and Failure of Ti-6Al-4V and Ti-5Al-5Mo-5V-1Cr-1Fe Alloys

Dynamic Shear Deformation and Failure of Ti-6Al-4V and Ti-5Al-5Mo-5V-1Cr-1Fe Alloys

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

Shock qualification of low-cost blast resistant wheels by in field tests

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