Sharif University of Technology Scientia Iranica 1026-3098 23 1 2016 02 01 Numerical and analytical approaches for improving the die design in the radial forging process of tubes without mandrel Numerical and analytical approaches for improving the die design in the radial forging process of tubes without mandrel 167 173 3823 10.24200/sci.2016.3823 EN H. Afrasiab Mechanical Engineering Department, Babol University of Technology, Babol, Iran Journal Article 2015 04 26 Radial forging without a mandrel offers a cost effective method for production of tubular components. However, nonuniform deformation, thickness variation, poor surface quality and undesirable residual stress distribution are the problems which should be overcome in order to achieve an optimal process. In this paper, radial forging dies with curved-shape profiles are proposed to alleviate some of the mentioned difficulties. Finite element simulations are used to prove the advantage of the proposed dies over the conventional linear dies. A novel analytical approach based on the slab method of analysis is developed to verify the finite element modeling. The obtained results provide useful guidelines for design and optimization of the radial forging process without mandrel. https://scientiairanica.sharif.edu/article_3823_bbf2726f13586f99bc63360da32873f2.pdf