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A Study on the Dynamic Material's Characteristics of Tungsten Alloy using Split Hopkinson Pressure Bar  

Hwang, Doo-Soon (충남대학교 기계공학과 대학원)
Rho, Beong-Lae (국방과학연구소)
Hong, Sung-In (충남대학교 기계공학과)
Publication Information
Journal of the Korean Society for Precision Engineering / v.22, no.8, 2005 , pp. 92-99 More about this Journal
Abstract
Tungsten heavy metal is characterized by a high density and novel combination of strength and ductility. Among them, 90W-7Ni-3Fe is used for applications, where the high specific weight of the material plays an important role. They are used as counterweights, rotating inertia members, as well as fur defense purposes(kinetic energy Penetrators, etc.). Because of these applications, it is essential to detemine the dynamic characteristics of tungsten alloy. In this paper, Explicit FEM(finite element method) is employed to investigate the dynamic characteristics of tungsten heavy metal under base of stress wave propagation theory for SHPB, and the model of specimen is divided into two parts to understand the phenomenon that stress wave penetrates through each tungsten base and matrix. This simulation results were compared to experimental one and through this program, the dynamic stress-strain curve of tungsten heavy metal can be obtained using quasi static stress-strain curve of pure tungsten and matrix.
Keywords
Tungsten heavy metal; Explicit FEM; SHPB(split Hopkinson pressue bar; Dynamic characteristics;
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Times Cited By KSCI : 2  (Citation Analysis)
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