Monitoring transient strains on a gun barrel using fibre Bragg-grating sensors

James, Stephen W.; Tatam, Ralph P.; Fuller, Stephen R.; Crompton, Colin

doi:10.1088/0957-0233/10/2/002

Cited by 12 publications

(6 citation statements)

References 13 publications

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“…We can assume that the parts are cylindrical tubes, from the general shape of the barrel. The system of differential equations for heat conduction through the barrel wall is the system of differential equations for the heat conduction of a cylinder tube [11][12][13]. (1)…”

Section: Determination Of the Temperature Range Of The Barrelmentioning

confidence: 99%

STUDY ON METHOD TO DETERMINE THE LIFE OF TESTING GUN THAT FIRES 7.62x25mm AMMUNITION

Phu¹,

Vo²,

Hung³

2023

adeletters

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The article presents a method to determine the life of a testing gun that fires 7.62x25mm ammunition. The scientific basis for determining the life of the test barrel is based on the wear of the rifling lands corresponding to the number of shots. The wear of the barrel is determined by the thermal and mechanical effects of the bullet’s driving band on the lands and the grooves. The results show that: With the number of fires being 1000, 2000, 3000, 4000, 5000, and 6000 respectively, the barrel wear is 0.334mm, 0.668mm, 1.002mm, 1.337mm, 1.671mm, 2.005mm, and the muzzle velocity is reduced respectively by 1.15%, 2.06%, 2.98%, 3.67%, 4.36%, 5.28%. The accuracy of the 7.62x25mm ammunition test results is reduced due to this change. In addition, to ensure the accuracy of the measurements, the barrel needs to be replaced when the number of shots is more than 5000 shots. The paper is an important theoretical basis for determining the gun life used to test infantry ammunition.

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Section: Determination Of the Temperature Range Of The Barrelmentioning

confidence: 99%

STUDY ON METHOD TO DETERMINE THE LIFE OF TESTING GUN THAT FIRES 7.62x25mm AMMUNITION

Phu¹,

Vo²,

Hung³

2023

adeletters

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“…31 Some FBG sensors have been tentatively applied to targets that generate high-speed strains, such as gun barrel, and the results show that FBG can accurately measure the strain in harsh environments of strong electromagnetic radiation. 32 Ayers et al 33 present a study using FBG sensors under high-strain-rate loading in a Hopkinson bar experiment, in which one-dimensional (1D) and two-dimensional (2D) strain measurements were carried out, and the viability of these sensors under more complex dynamic loading was evaluated. This article describes dynamic strain measurement under explosive load on a special subway door.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and identification of dynamic strain on a blast door subjected to blast loading using fibre Bragg grating sensors

Xiong

Zhang

Lü

et al. 2018

International Journal of Distributed Sensor Networks

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Tunnels and subway blast doors are effective barriers to terrorist attacks and emergencies, and research into the mechanical properties of blast doors under explosive dynamic loads can improve and enhance the performance thereof. In this article, surface strain measurements on subway blast door models under dynamic load are carried out using quasi-distributed fibre Bragg grating sensors. The principle underpinning fibre Bragg grating sensing is introduced before the experiment. In the experiment, a model of an explosion-proof door was designed, and the experimental foundation pit was designed to be used to fix the explosion-proof door. Then, eight fibre Bragg grating sensors are placed at different positions on the surface of the explosion door to measure the strain at the time of explosion. Through the experiment we found that the optical fibre grating sensing system can be used under explosive loading surface strain: the strain distribution on the surface of the protective door is revealed under large dynamic strain. At the same time, the rebound effect of the protective door in the explosion was found through the strain phenomenon in double peak phenomenon. The strain distribution and rebound effect in the test results can provide a useful reference for the mechanical design of the blasting door and the strain monitoring of reinforced concrete structures under dynamic load.

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“…If the FBG is designed to be perturbed by only one particular measurand, then monitoring changes in the wavelength allows one to determine changes in that measurand. FBGs have been applied widely to measure temperature [7,8], strain [9][10][11][12][13] and pressure [14,15], while a variety of other measurands can be measured by using specially packaged FBGs [16,17]. FBG sensors offer many advantages such as localized sensing, high signal to noise ratio and the ability to multiplex a large number of sensors along a single length of optical fibre by fabricating the sensor elements such that each has a distinct centre wavelength.…”

Section: Introductionmentioning

confidence: 99%

On-line monitoring of multi-component strain development in a tufting needle using optical fibre Bragg grating sensors

Chehura

Dell’Anno

Huet

et al. 2014

Smart Mater. Struct.

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Dynamic loadings induced on a tufting needle during the tufting of dry carbon fibre preform via a commercial robot-controlled tufting head were investigated in situ and in real-time using optical fibre Bragg grating (FBG) sensors bonded to the needle shaft. The sensors were configured such that the axial strain and bending moments experienced by the needle could be measured. A study of the influence of thread and thread type on the strain imparted to the needle revealed axial strain profiles which had equivalent trends but different magnitudes. The mean of the maximum axial compression strains measured during the tufting of a 4-ply quasi-isotropic carbon fibre dry preform were −499 ± 79 µε, −463 ± 51 µε and −431 ± 59 µε for a needle without thread, with metal wire and with Kevlar R thread, respectively. The needle similarly exhibited bending moments of different magnitude when the different needle feeding configurations were used.

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Monitoring transient strains on a gun barrel using fibre Bragg-grating sensors

Cited by 12 publications

References 13 publications

STUDY ON METHOD TO DETERMINE THE LIFE OF TESTING GUN THAT FIRES 7.62x25mm AMMUNITION

STUDY ON METHOD TO DETERMINE THE LIFE OF TESTING GUN THAT FIRES 7.62x25mm AMMUNITION

Evaluation and identification of dynamic strain on a blast door subjected to blast loading using fibre Bragg grating sensors

On-line monitoring of multi-component strain development in a tufting needle using optical fibre Bragg grating sensors

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