3D-FE simulation of inhomogeneous stress and strain distributions in cold profiled ring rolling process under different hardening coefficients
by Lanyun Li; Xiao Li; Zhi He
International Journal of Materials and Product Technology (IJMPT), Vol. 44, No. 1/2, 2012

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.

Online publication date: Wed, 17-Sep-2014

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