Research on Contact Pressure Model of Cold Rolled Deformation Zone of Thin Strip Based on Anisotropy

doi:10.3901/JME.2025.08.127

Abstract

Abstract: In the traditional thin strip rolling deformation zone theory, the rolling parts are often assumed to be ideal isotropic materials, without considering the anisotropy problem introduced in the material itself or the subsequent processing, which significantly reduces the accuracy of theoretical predictions and creates significant challenges for the rational formulation of the subsequent process. Therefore, to investigate the influence of the differences in yield criteria and the rationality of yield stress on the contact characteristics of the deformation zone, a combination of the theoretical analysis, numerical simulation, and experimental verification is used. The results show that the unreasonable value of yield stress and the difference of yield criterion will result in a significant deviation from the reality of the deformation zone profile, the coordinates of the critical point of each zone, and the actual compression rate. The neutral zone of the rolled piece with higher yield stress value appears earlier and the width proportion is larger, and the discrimination result of the equivalent stress of the MISES isotropic yield criterion reaches the yield of the rolled piece earlier than that of the HILL48 orthotropic criterion. The contact characteristics of the rolling deformation zone of the anisotropic thin strip can be more accurately predicted by the contact pressure model of the deformation zone modified by the anisotropy coefficient, using the RD tensile yield stress as a reference.

Key words: thin strip, rolling, deformation zone theory, yield criterion, anisotropy

CLC Number:

TG331

LI Wei, HUANG Ziteng, LI Songsong, YU Hui, LUO Xu. Research on Contact Pressure Model of Cold Rolled Deformation Zone of Thin Strip Based on Anisotropy[J]. Journal of Mechanical Engineering, 2025, 61(8): 127-137.

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