Influence of Speed-up and Speed-down on Internal Stresses of Wound Rolls in Web Handling Process

Mongkolwongrojn Mongkol; Jeenkour Puttha

doi:10.4028/www.scientific.net/AMR.452-453.1262

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 452-453Influence of Speed-up and Speed-down on Internal...

Influence of Speed-up and Speed-down on Internal Stresses of Wound Rolls in Web Handling Process

Abstract:

In web winding process, the effects of speed-up and speed-down on internal stresses of wound roll have been investigated. The air-entrainment can be obtained theoretically using the modified nonlinear Hakiel model. In this research work, air-entrainment model established by Hamrock and Dowson was applied to estimate the initial air film layers into a wound roll in the winding system with a nip-roller. Moreover, the characteristics of a wound roll were examined under varying tension and varying speed conditions. The numerical results showed the radial stress, tangential stress, and friction force distributions at central inside a wound roll under the condition for a wound roll without wrinkle and slippage phenomena.

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Periodical:

Advanced Materials Research (Volumes 452-453)

Pages:

1262-1266

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.452-453.1262

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Online since:

January 2012

Authors:

Mongkolwongrojn Mongkol, Jeenkour Puttha

Keywords:

Internal Stress, Slippage, Speed-Down, Speed-Up, Web Handling System, Wound Roll, Wrinkle

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