Roll forming process of automotive seat rail with 980 DP steel using Yoshida-Uemori kinematic hardening model

Cold roll forming process pdf

Parameters Determination of Yoshida Uemori Model Through Optimization Process of Cyclic Tension-Compression Test and V-Bending Springback

In recent years, the studies on the enhancement of the prediction capability of the sheet metal forming simulations have increased remarkably. Among the used models in the finite element simulations, the yield criteria and hardening models have a great importance for the prediction of the formability and springback. The required model parameters are determined by using the several test results,...

Issues associated with the use of Yoshida nonlinear isotropic/kinematic hardening material model in Advanced High Strength Steels

The Yoshida nonlinear isotropic/kinematic hardening material model is often selected in forming simulations where an accurate springback prediction is required. Many successful application cases in the industrial scale automotive components using advanced high strength steels (AHSS) have been reported to give better springback predictions. Several issues have been raised recently in the use of ...

Stress Analysis and Energy Estimation in Cold-Roll Forming Process

In this article, stress analysis and energy estimation during cold-roll forming of symmetrical channel sections have been discussed. Geometry of sheet strip is pre-estimated by a shape function. Then longitudinal, transversal and shear strains have been calculated. Using both the Levy-Mises and the Prandtl Reuss equations, and also considering the Bauschinger effect, stress distributions have b...

Process Planning and Metallurgical Issues for Laser Assisted Spin Forming of Dual Phase Automotive Steel

Laser assisted spin forming is used to process a galvanized Dual Phase steel with minimum damage to coating, microstructure and material properties. Effective increase in formability was achieved, but no evidence of recrystalization, neither drop in forming force was detected. The paper discusses the possible mechanism of formability improvement through the analysis by EBDS of laser assisted fo...