2026-04-23T04:37:57Zhttps://ebiltegia.mondragon.edu/oai/request

oai:ebiltegia.mondragon.edu:20.500.11984/16412024-03-05T11:40:58Zcom_20.500.11984_1143col_20.500.11984_1148

00925njm 22002777a 4500 dc Silvestre Soriano, Elena author GALDOS, Lander author Sáenz de Argandoña, Eneko author Mendiguren, Joseba author 2016 Roll levelling is a primary manufacturing process used to remove residual stresses and imperfections of metal strips in order to make them suitable for subsequent forming operations. In the last years the importance of this process has been evidenced with the apparition of Ultra High Strength Steels with strength > 900 MPa. The optimal setting of the machine as well as a robust machine design has become critical for the correct processing of these materials. Finite Element Method (FEM) analysis is the widely used technique for both aspects. However, in this case, the FEM simulation times are above the admissible ones in both machine development and process optimization. In the present work, a semi-analytical model based on a discrete bending theory is presented. This model is able to calculate the critical levelling parameters i.e. force, plastification rate, residual stresses in a few seconds. First the semi-analytical model is presented. Next, some experimental industrial cases are analyzed by both the semi-analytical model and the conventional FEM model. Finally, results and computation times of both methods are compared. 1742-6588 https://katalogoa.mondragon.edu/janium-bin/janium_login_opac.pl?find&ficha_no=124963 https://hdl.handle.net/20.500.11984/1641 Analytical models Computation theory High strength steel Machine design Metal forming Numerical model Optimization Process control Residual stresses Sheet metal Strip metal Wear of materials Roll levelling semi-analytical model for process optimization