Abstract
In this article, a series of analysis were performed on a two-dimensional structure of steel and rubber-covered rollers. First, a hyperelastic–viscoelastic composite constitutive model based on a dynamic mechanical experiment of rubber was formulated to accurately describe rubber properties. Meanwhile, a hyperelastic constitutive model not considering viscoelasticity was set as the control group. The material used in this article was the nitrile rubber with the Shore hardness of 40. Then, the effects of viscoelasticity on the von Mises stress were analyzed by comparing results of two models. The influences of working conditions (roller speeds/compression displacement) on the von Mises stress and the area of hysteresis loop were also studied. Next, the contact characteristics under different working conditions and constitutive models were analyzed combining viscoelasticity. A verification experiment of contact width was carried out, and the theoretical and simulated values were calculated and compared. Finally, the relation of “low peak” phenomenon with viscoelasticity was studied, and the effects of working conditions and rubber viscoelasticity on contact feature of rollers were summarized. The conclusions of the article can help engineers to better optimize dynamic working conditions and judge the working state of the structure.
Highlights
The effects of viscoelasticity on the von Mises stress were analyzed by comparing results of two models
In the field of papermaking, printing, and sheet making, rollers are widely used in the process of media transfer or sheet material manufacturing
Pairs of steel and rubber-covered rollers are typical combinations usually used in rollers machine
Summary
In the field of papermaking, printing, and sheet making, rollers are widely used in the process of media transfer or sheet material manufacturing. Pairs of steel and rubber-covered rollers are typical combinations usually used in rollers machine. The mechanical characteristics and rolling stability during the transmission process are worth studying, especially the changes caused by working conditions and the material. This is the main research content of this article. Many other researchers have studied the contact problems of steel and rubber-covered rollers. The assumption of plane-strain state, in which the rollers have infinite length and the uniformly axial pressure, was used frequently to determine the contact pressure distribution of rubber-covered rollers. Johnson[1] discussed the pressure distribution and pressure state of two-dimensional cylindrical rolling contact problems based on narrow strip theory and half-plane hypothesis
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