NDLI: Ductile fracture model in the shearing process of zircaloy sheet for nuclear fuel spacer grids

Content Provider	Springer Nature Link
Author	Wang, Jaeyoon Kim, Naksoo Lee, Hyungyil
Copyright Year	2012
Abstract	Features of sheared edges are predicted based on material properties of Zircaloy obtained from the tensile test and ductile fracture model such as the Gurson-Tvergaard-Needleman (GTN) and Johnson-Cook models. The sheared edges formations are numerically analyzed in each ductile model. An appropriate ductile fracture model is selected to study the relative depth of sheared edges with respect to process parameters. The tendency of failure parameters that are affected by sheared edges and fracture duration is investigated. We applied changes on parameters of failure models to show that the punch force curve and the ratio of characteristic lengths could be coincided, which led us to conclude that the GTN and Johnson-Cook models are equivalent. In the Johnson-Cook model, however, the characteristic length of the sheared edges does not change as each failure parameter reaches a critical value. Hence, the FE prediction model for forming defects is developed using the GTN failure model. Finally, the characteristic length of sheared edges have been measured using the FE prediction model for shearing process parameters such as punch velocities, clearance, and tool wear. Our results showed that the punch-die clearance is the most significant factor that affects forming defects when compared to other factors.
Starting Page	303
Ending Page	316
Page Count	14
File Format	PDF
ISSN	15989623
Journal	Metals and Materials
Volume Number	18
Issue Number	2
e-ISSN	20054149
Language	English
Publisher	The Korean Institute of Metals and Materials
Publisher Date	2012-04-27
Publisher Place	Springer
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	defects zircaloy ductile damage model features of sheared edge fracture Continuum Mechanics and Mechanics of Materials Characterization and Evaluation of Materials Engineering Thermodynamics, Heat and Mass Transfer Operating Procedures, Materials Treatment Metallic Materials Magnetism, Magnetic Materials
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Mechanics of Materials Metals and Alloys Condensed Matter Physics

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