Failure mechanism for metal cylinder under explosive loading

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This paper presents the numerical study of dynamic fracture for metal cylinder under internal explosive loading. Also, the effects of fracture models and groove designs on fracture behavior are investigated. For the dynamic hardening behavior, the Lim-Huh model including the thermal softening effect is adopted [1, 2]. Also, the Lou-Huh fracture model considering the strain rate dependency is used for fracture prediction [3]. The tensile fracture occurs first at the outer surface, and the shear fracture is observed near the inner surface. In addition, finite element analyses are performed to study the effect of various groove designs on dynamic fracture; single U-groove and V-groove at the outer surface. The tensile and shear fracture lines are predicted near the groove tip and inner surface, respectively. It is concluded that the stress triaxiality parameter is one of the critical factors in the dynamic fracture prediction of the metal cylinder.
Publisher
KOREAN SOC MECHANICAL ENGINEERS
Issue Date
2022-09
Language
English
Article Type
Article
Citation

JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY, v.36, no.9, pp.4463 - 4474

ISSN
1738-494X
DOI
10.1007/s12206-022-0811-5
URI
http://hdl.handle.net/10203/298564
Appears in Collection
ME-Journal Papers(저널논문)
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