Browsing OSU - International Conference on Web Handling by Author "International Conference on Web Handling (2009)"

Now showing items 1-20 of 31

    • 2D FSI model for paper webs and fabrics moving close to each other in complex geometries 

      Immonen, Eero; Bergstrom, Fredrik; Nurmi, Simo; Lehtinen, Antti; Juppi, Kari; Martinsson, Lars (Oklahoma State University, 2009-06)
      In the present article we develop a two-dimensional computational fluid-structure interaction (FSI) model for small transverse deflections of a moving paper web, supported on one side by a fabric, both moving in an arbitrary ...

    • Axisymmetric wound roll models 

      Mollamahmutoglu, C.; Good, J. K. (Oklahoma State University, 2009-06)
      Axisymmetric wound roll models provide the greatest definition of wound roll internal stresses to date. Simple one dimensional models can provide the user with radial profiles of pressure and circumferential stress as a ...

    • Computation of span length variations due to out-of-round material rolls 

      Branca, C.; Pagilla, P. R.; Reid, K. N. (Oklahoma State University, 2009-06)
      It is well known that non-ideal elements such as out-of-round/eccentric material rolls affect web tension. However, the mechanism through which these non-ideal components induce tension oscillations was not clear previously. ...

    • Finite element analysis of winding nip mechanics 

      Kandadai, B. K.; Good, J. K. (Oklahoma State University, 2009-06)
      Wound-on-Tension (WOT) is the tension in the outermost layer of a winding roll that is created due to the incoming web tension and the tension induced by the nip roller called Nip-Induced-Tension (NIT). This paper presents ...

    • Gentle wavy defects in knurled wound rolls 

      Cole, Kevin (Oklahoma State University, 2009-06)
      The manufacture of many products involves the winding of continuous thin, flexible webs into wound rolls. In many applications involving the use of plastic webs, it is beneficial to mechanically emboss the edges of the web ...

    • Improvement of control of a web accumulator 

      Shelton, John J. (Oklahoma State University, 2009-06)
      Previous analysis of the dynamics of a conventional accumulator (no driven rollers within the accumulator, with all rollers identical) was published by Shelton [1]. This 1999 analysis showed that such accumulators commonly ...

    • Improvement of slippage and wrinkling of transporting webs using micro-grooved rollers 

      Hashimoto, Hiromu; Hikita, Shinji (Oklahoma State University, 2009-06)
      We describe an entirely new method of improving the slippage between web and roller. First, the concept of a micro-grooved roller is introduced, and then a theoretical model for estimating the slip onset velocity under the ...

    • Industrial use for the "nip-inducted effect" to separate sheets 

      Desch, M.; Dorsam, E.; Kaulitz, T. (Oklahoma State University, 2009-06)
      This paper introduces an analytical method for the explanation of the nip inducted effect. This effect is known for a long term as a disturbance effect in the web handling industry. Here it is used for breaking bindings ...

    • Intelligent roll platform for better runnability 

      Pitkanen, Tatu; Bettendorf, Bob; Tuomisto, Martti (Oklahoma State University, 2009-06)
      An intelligent roll is a mechatronic system consisting of a roll in a web handling machine that is also used as a transducer for sensing cross machine tension or linear load. The intelligent roll has electret film force ...

    • Laminate theory based 2D curl model 

      Kidane, Sam (Oklahoma State University, 2009-06)
      The laminate theory provides a method of analyzing the mechanics of multilayer composite laminates. With the appropriate definition of the load vector, the laminate theory can be extended to model curl resulting from ...

    • Large deformation winding models 

      Mollamahmutoglu, C.; Good, J. K. (Oklahoma State University, 2009-06)
      Almost all winding models incorporate the assumption of small linear deformations and strain in development. As such these models treat the addition of a layer of web to a winding roll with linear analysis using linear ...

    • Lateral dynamics of non-uniform webs 

      Swanson, Ronald P. (Oklahoma State University, 2009-06)
      A new method of generating and testing cambered web has been developed. Experimental lateral static data is presented for twenty six different conditions and dynamic data is presented for five of these conditions. Numerous ...

    • Measurement of nip induced tension and contact stresses 

      Kandadai, B. K.; Good, J. K. (Oklahoma State University, 2009-06)
      Wound-on-Tension (WOT) is the tension in the outermost layer of a winding roll that is created due to the incoming web tension and the tension induced by the nip roller called Nip-Induced-Tension (NIT). Kandadai and Good ...

    • Measurement of web surface profiles using fringe projection 

      Lu, Hongbing; Bhumannavar, Vinay; Liang, Junfeng; Ren, Yao (Oklahoma State University, 2009-06)
      In this paper a full-field measurement technique, namely fringe projection technique was implemented to determine the three-dimensional surface profile for situations where webs are opaque or translucent. In this method, ...

    • Mechanistic survey of accumulating, resonant, and self-exciting systems in web handling 

      Roisum, David R. (Oklahoma State University, 2009-06)
      Certain problems in web handling can be challenging because they tend to get worse with time. Consider mechanical resonance. The longer you run at resonant vibration conditions, the worse the problem will initially get. ...

    • Modeling and control of web velocity and tension: An industry/university perspective on issues of importance 

      Carlson, Dan H.; Pagilla, P. R.; Weaver, Mark D. (Oklahoma State University, 2009-06)
      The goal of this paper is to provide an overview of current industrial practice in control of web velocity and tension and discuss some critical issues that require future research from the community which is pertinent to ...

    • Modeling and identification of the source of oscillations in web tension 

      Branca, C.; Pagilla, P. R.; Reid, K. N. (Oklahoma State University, 2009-06)
      Although there has been much work in dynamic modeling of different web handling elements and web longitudinal behavior, efforts to systematically validate models by experimentation on a web platform are non-existent. ...

    • Modeling grooved rolls with moving 2D porous media 

      Nurmi, Simo; Berstrom, Fredrik; Immonen, Eero; Lehtinen, Antti; Juppi, Kari; Martinsson, Lars (Oklahoma State University, 2009-06)
      Rolls are widely used in paper machines to heat, press and support paper webs and fabrics in order to facilitate rapid drying and transport of the paper web through the machine. In modern high speed paper machines, however, ...

    • Optimization of wind-up tension of webs preventing wrinkles and slippage with experimental verification 

      Hashimoto, Hiromu (Oklahoma State University, 2009-06)
      This paper describes the optimization method of wind-up tension to prevent wound roll defects, mainly star defect (wrinkling) and telescope (slippage), based on the optimum design technique. Hakiel's nonlinear model with ...

    • Phenomens of rolling contact in paper calendering 

      Niebuhr, V.; Desch, M.; Welp, E. G. (Oklahoma State University, 2009-06)
      In soft calenders synthetic roll covers are "state of the art", without knowing their detailed rolling contact behavior and their phenomenological effects to gloss and smoothness of paper. Complex interactions of process ...