A Model for Determining the Asperity Engagement Height in Relation to Web Traction Over Non-Vented Rollers
Author:
Rice Brian S.1, Cole Kevin A.1, Mu¨ftu¨ Sinan2
Affiliation:
1. Eastman Kodak Company, Rochester, NY 14652 2. Northeastern University, Department of Mechanical Engineering, Boston, MA 02115
Abstract
The traction developed between a thin flexible web, wrapped around a non-vented, rotating cylindrical roller is studied experimentally and theoretically. A series of eight webs representing a wide range of surface roughness characteristics are traction-tested against the same roller over a wide speed range. A mathematical model that couples air film pressure, web deflection, and asperity deformations is used to model the web/roller interface. An optimization technique is used to estimate the asperity compliance function parameters based on the experimental results and the mathematical model. A new model for determining the asperity engagement height, for surfaces with non-Gaussian peak height distribution, is proposed when the roughness of both surfaces is taken into account. Results are presented that indicate the viability and utility of the new methods.
Publisher
ASME International
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials
Reference16 articles.
1. Daly, D. A.
, 1965, “Factors Controlling Traction Between Webs and Their Carrying Rolls,” Tappi J., 48, No. 9, pp. 88–90. 2. Forrest, A. W., Jr., and Anderson, V. L., 1997, “Film Surface Considerations for Enhancing Winding of Thin Films,” Proceedings of the Fourth International Conference on Web Handling, Oklahoma State University. 3. Knox, K. L., and Sweeney, T. L., 1971, “Fluid Effects Associated with Web Handling,” Ind. Eng. Chem. Process Des. Dev., 10, No. 2, pp. 201–205. 4. Eshel, A., and Elrod, H. G., Jr., 1965, “The Theory of the Infinitely Wide, Perfectly Flexible, Self-Acting Foil Bearing,” Journal of Basic Engineering, Trans. of the ASME, March 1959, pp. 94–100. 5. Ducotey, K. S., and Good, J. K., 1995, “The Importance of Traction in Web Handling,” ASME J. Tribol., 117, pp. 679–684.
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