Transactions of Materials and Heat Treatment

Title：Influence of friction model on contact zone distribution during upsetting process for disc parts

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ClassificationCode：TG306

year,vol(issue):pagenumber：2023,48(10):215-221

Abstract：

During the upsetting process of disc parts, for the complex friction shear stress changes at different areas of contact area under different deformation degrees, the friction model switable for the disc upsetting was studied, the finite element model of upsetting for the disc parts with an initial diameter-thickness ratio of 5 was established, and the distribution characteristics of contact area and the change characteristics of radius in braking area under different deformation degrees for different friction models were analyzed and compared with the calculated results. Then, the relevant process experiments were carried out to verify. The results show that in the upsetting process of disc parts, the distribution of contact area varies with the diameter-thickness ratio as the deformation degree increases, and the change characteristics of radius in braking area predicted by the modified hybrid friction model are closer to the theoretical value, and the prediction accuracy is higher. The results provide guidance for the setting of friction boundary conditions in finite element simulation of plastic forming for disc parts.

Funds：

国家自然科学基金资助项目（52275369,52005375）；教育部创新团队发展计划项目(IRT_17R83)

陈慧（1997-），女，硕士研究生 E-mail：whut_chenhui@163.com

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