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Predicting polygonal-shaped defects during hot ring rolling using a rigid-viscoplastic finite element method |
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| Authors: | Ho Keun Moon Min Cheol Lee Man Soo Joun |
| Affiliation: | aR&D Center, FAG Bearings Korea Ltd., Changwon 641-020, Republic of Korea;bDepartment of Mechanical Engineering, Gyeongsang National University, GyeongNam 660-701, Republic of Korea;cSchool of Mechanical and Aerospace Engineering, Gyeongsang National University, Gazwa-dong 900, Jinju-City, GyeongNam 660-701, Republic of Korea;dResearch Center for Aircraft Parts Technology, Gyeongsang National University, GyeongNam 660-701, Republic of Korea |
| Abstract: | We applied a rigid-viscoplastic finite element method to investigate polygonal-shaped defects that occur during ring rolling and developed an improved analysis model with relatively fine finite elements near the roll gap to reduce the computational time, along with a scheme to minimize the volume change. We also simulated the formation of a polygonal-shaped defect during hot ring rolling of a ball bearing outer race. The results were in good qualitative agreement with actual experimental phenomena. |
| Keywords: | Ring rolling Finite element method Computer simulation Polygonal-shaped defect Ball bearing race |
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