Title: 3D-FE simulation of inhomogeneous stress and strain distributions in cold profiled ring rolling process under different hardening coefficients

Authors: Lanyun Li; Xiao Li; Zhi He

Addresses: Key Laboratory of Materials Processing Engineering, School of Material Science and Engineering, Xi'an Shiyou University, Xi'an, 710065, China. ' Key Laboratory of Materials Processing Engineering, School of Material Science and Engineering, Xi'an Shiyou University, Xi'an, 710065, China. ' Key Laboratory of Materials Processing Engineering, School of Material Science and Engineering, Xi'an Shiyou University, Xi'an, 710065, China

Abstract: Cold profiled ring rolling is an advanced continuous local metal forming technology widely used for manufacturing various seamless complex-section rings. Investigating the stress and strain distributions (SSD) is very significant for rapidly predicting the defects and improving the quality of deformed rings. The non-uniform SSD in T-shaped cold ring rolling with different hardening exponents are investigated based on 3D-FE simulation. The results show: 1) despite the difference in hardening exponent, the compressive effect of stress is larger near the outer-surface and decreases toward the core; it increases from the core to contact inner-surface but decreases from the core to the non-contact inner surface; 2) the deformation around the groove fillet is larger and more non-uniform; 3) the surface layer of the filling part near the fillet deforms a little smaller but still non-uniformly, the tensile principal stress components increases and the hydrostatic stress is positive, resulting in poor plasticity.

Keywords: cold profiled ring rolling; stress distribution; strain distribution; hardening coefficient; 3D simulation; finite element method; FEM; deformed rings; ring quality; deformation; plasticity.

DOI: 10.1504/IJMPT.2012.048192

International Journal of Materials and Product Technology, 2012 Vol.44 No.1/2, pp.47 - 66

Published online: 17 Sep 2014 *

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