Analysis of the variation of the cold-rolling characteristics of rolling force, strip shape, stress and temperature, for a three-dimensional strip

3D Analysis of cold rolling using a constitutive model for interface friction

“…Instead of using a constant friction coe cient in connection with the assumption of purely slipping contact Jian and Tieu [5] employed a friction variation model when analysing thin strip rolling. For at rolling of plate, slab or thick strip either purely slipping contact, [6], Lin and Lin [10], Lee [11], or a combination of both slip and no-slip, [7], Richelsen [8,9], have been used for the description of the interfacial contact between the roll and the work piece. While 2D studies of the rolling process are reported in [1][2][3]8,9], the results shown in [7] are for both 2D and 3D studies, and results for 3D studies of the rolling process are given in [4][5][6]10,11].…”

“…Komori [4], and the ÿnite element method, e.g. [5][6][7][8][9][10][11], have been used for two-dimensional as well as three-dimensional studies of the rolling process depending on the assumption for the deformation of the work piece material in the width direction. Whether the plane strain assumption used in 2D rolling analyses is a reasonable approximation highly depends on the width-to-thickness ratio of the work piece, as the width spread during the rolling process increases with decreasing width-to-thickness ratio, e.g.…”

“…In order to illustrate spread, the corresponding shear deformation of the plate and the ÿnal cross-sectional geometry for di erent cross-sections, a number of deformed meshes are shown. Cold rolling is often used as the last pass in a rolling process and thus has large in uence on the quality of the plate, in particular the ÿnal geometry of the surface of the plate [10].…”

Finite-element modeling of thermal aspects in high speed cold strip rolling

“…Accordingly, there are only a few studies conducted taking into account the thermo-mechanical response of strips and work-rolls during cold rolling process. 12–14 It has been documented that although the thermal loading is generally neglected during the mathematical analysis of cold rolling, it might give rise to large localized stresses within the work-roll, which would eventually elevate the level of dimensional inaccuracy of the final product and/or shorten the roll life. 13 Another significance of the thermal analysis of cold rolling, particularly in cold rolling of steels, is in prediction of the thermally activated metallurgical phenomenon dynamic strain aging (DSA).…”

Thermomechanical behaviours of strip and work-rolls in cold rolling process

“…Malinowski and Lenard [16] have used the elastic-plastic finite element method to evaluate stress distribution during cold rolling of aluminium strips. Lin and Lin [17] have employed a combined finite element-finite difference model to predict thermal and mechanical behaviour of aluminium strip during cold rolling processes. Arif et al [18] have developed a thermomechanical model to evaluate stresses and strains within the working rolls in the process of cold strip rolling.…”