Mohr–Coulomb 파단모델을 이용한 텅스텐 합금의 충격 파단 예측Prediction of Impact Fracture for Tungsten Alloy Using the Mohr–Coulomb Fracture Model

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A new concept of ammunition without the use of explosive gunpowder has been recently studied, which achieves performance equal to or higher than that of high explosives. Frangible Armor Piercing (FAP) is one of the concepts, which utilizes a tungsten alloy penetrator specialized for fragmentation. To investigate the fracture behavior of the tungsten alloy penetrator, Taylor impact tests were conducted at various impact velocities. Additionally, finite element analysis was performed to predict the fracture behavior of the tungsten alloy. Compression tests were also carried out at six strain rates for dynamic material properties and the dynamic hardening behavior was successfully predicted with the Lim–Huh model. Finally, the Mohr–Coulomb fracture model based on the mean stress was adopted to predict impact failure in Taylor impact simulation. The analysis predicts the deformation and fracture behaviors of the tungsten alloy successfully
Publisher
한국소성가공학회
Issue Date
2021-02
Language
Korean
Citation

소성가공, v.30, no.1, pp.16 - 21

ISSN
1225-696X
DOI
10.5228/KSTP.2021.30.1.16
URI
http://hdl.handle.net/10203/290014
Appears in Collection
ME-Journal Papers(저널논문)
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