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Cited 2 time in webofscience Cited 4 time in scopus
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The effects of theoretical models of materials and die on finite element predictions in a forging process of aluminum scroll

Authors
Song, H. N.Kim, Y. S.Joun, M. S.
Issue Date
Apr-2021
Publisher
Professional Engineering Publishing Ltd.
Keywords
Thermo-mechanical; FE predictions; forging; material model; die fracture; scroll; aluminum
Citation
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering, v.235, no.2, pp 274 - 284
Pages
11
Indexed
SCIE
SCOPUS
Journal Title
Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering
Volume
235
Number
2
Start Page
274
End Page
284
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/3873
DOI
10.1177/0954408920958106
ISSN
0954-4089
2041-3009
Abstract
In this paper, the effects of theoretical models of materials and dies on finite element (FE) predictions of a hot forging process are presented, to provide process design engineers and researchers with some useful insight into the theoretical approaches on which they rely. The material was assumed to be rigid-viscoplastic or rigid-thermoviscoplastic and the dies were assumed to be rigid or elastic. The problem of die fracture occurring during the hot forging of aluminum fixed scroll was studied. This process is particularly sensitive to theoretical models, mostly because the die-stress component causing the die fracture has a relatively weak relationship with the forming load. A fully thermo-mechanically coupled FE analysis considered die elastic deformation and was first conducted to reveal die fracture with emphasis on the maximum die stress and forming load. The predictions for four simulated cases using different theoretical assumptions of the material and die were then compared. These were also compared with experiments,undertaken to observe the relationship between maximum die stress component and forming load, to reveal the effects of material and die models in FE predictions. The differences in forming load, die stress and their variation with time among the four cases were clarified quantitatively for different die and material models, to provide some insight into metal forming for engineers and researchers.
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Joun, Man Soo
대학원 (기계항공우주공학부)
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