Browsing OSU - International Conference on Web Handling by Author "d5feb0bc-ea39-40dd-804c-994e05580ae0"

Now showing items 1-20 of 46

    • Abilities and inabilities of wound roll models to predict winding defects 

      Good, J. K. (Oklahoma State University, 2005-06)
      Wound roll models began appearing in the literature 40 years ago. These models predict internal stresses within wound rolls due to winder operating conditions and web material properties. The models have progressed much ...

    • Air entrapment and residual stresses in rolls wound with a rider roll 

      Good, J. K.; Covell, S. M. (Oklahoma State University, 1995-06)
      Air is entrained during the process of winding webs. Rider rolls are often employed in an effort to reduce the amount of air which enters the wound roll. This paper presents the results of an experiment which allows the ...

    • Analysis of trough formation and lateral steering of a web due to a tapered downstream roller 

      Beisel, J. A.; Good, J. K. (Oklahoma State University, 2005-06)
      Cylindrical rollers are never perfectly cylindrical. A common defect of a cylindrical roller is radial taper. A roller with a radial taper will induce a lateral shear force into the web. This shear force will cause a ...

    • Analysis of web spreading induced by the concave roller 

      Delahoussaye, R. D.; Good, J. K. (Oklahoma State University, 1993-06)
      This paper describes the development of a model for predicting the elastic deformations and stresses in a web crossing a concave (or negative crown) roller. The Finite Element Method was used to compute web displacements, ...

    • Analysis of web spreading induced by the curved axis roller 

      Delahoussaye, R. D.; Good, J. K. (Oklahoma State University, 1993-06)
      This paper describes the development of a model for predicting the elastic deformations and stresses in a web crossing a curved-axis roller. The Finite Element Method was used to compute web displacements, forces and ...

    • Axisymmetric nonlinear transient thermo-elastic winding model 

      Mollamahmutoglu, C.; Good, J. K. (Oklahoma State University, 2015-06)
      Temperature is among the most important environmental factors which play a crucial role on the mechanical state of wound rolls of web material. Existing literature include studies concerning the thermal characterization ...

    • 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 ...

    • Behavior of webs transiting crowned rollers 

      Vaijapurkar, S.; Beisel, J. A.; Good, J. K. (Oklahoma State University, 2013-06)
      Crowned rollers are known to center running belts by observation. Crown can be an unintentional artifact of rollers whose surfaces are machined on lathes while supported at their ends. The bending stiffness of the rotating ...

    • Boundary conditions for lateral deformation of webs transiting rollers in roll-to-roll process machines 

      Good, J. K.; Ren, Yao; Shi, Jinxin (Oklahoma State University, 2017-06)
      The lateral deformations of webs in roll-to-roll (R2R) process machines can affect the quality of the manufacturing process. The lateral registration of the web in successive R2R processes can determine whether a product ...

    • Buckling of orthotropic webs in process machinery 

      Good, J. K.; Beisel, J. A. (Oklahoma State University, 2003-06)
      Many webs in web process machinery exhibit out-of-plane deformations, defined as troughs, in free web spans between rollers. In other cases when the troughs become severe the out-of-plane web deformations will begin to ...

    • Comparison of center and surface winding using the wound-in-tension method 

      Good, J. K.; Hartwig, J.; Markum, R. (Oklahoma State University, 1999-06)
      Pfeiffer first defined the wound-in-tension measurement in 1968[1]. This technique requires the outer layer of web to be pulled away from a winding roll and a measure of the web tension is made prior to returning the web ...

    • Computing wound roll stresses based upon web surface characteristics 

      Good, J. K.; Xu, Y. (Oklahoma State University, 1993-06)
      Historically wound roll models have required the input of a radial modulus of elasticity. Heretofore this modulus has been measured using material testing systems which have shown the radial modulus to be dependent upon ...

    • Coupling of winding models and roll quality instruments 

      Mollamahmutoglu, C.; Bulut, O.; Adari, S.; Good, J. K. (Oklahoma State University, 2015-06)
      Winding models have been under development for roughly 50 years. These models have become mature in their ability to predict the internal residual stresses within a wound roll as a function of winder type, winder operating ...

    • Design of contoured rollers for web spreading 

      Markum, R. E.; Good, J. K. (Oklahoma State University, 2001-06)
      Contraction of a web in the cross width direction while running over rollers can be traced to runability problems and wound roll defects. These defects may include troughing, baggy lanes, wrinkles and registration difficulties ...

    • Effect of air entrainment in centerwound rolls 

      Good, J. K.; Holmberg, M. W. (Oklahoma State University, 1993-06)
      Internal stress models for centerwound rolls have existed for over thirty years but no model to date has accounted for air which is entrained due to the web velocity and the viscosity of air. This paper reports the results ...

    • Effect of winder type and web material properties on wound-on-tension 

      Ren, Y.; Kandadai, B.; Good, J. K. (Oklahoma State University, 2013-06)
      The choice of winder type for various web materials has long been a qualitative discussion. Web materials are vast and hence the range of web material properties is also vast. Valid but conflicting opinions for an optimal ...

    • Entrained air films in center wound rolls - with and without the nip 

      Taylor, R. M.; Good, J. K. (Oklahoma State University, 1997-06)
      Development of analytical expressions predicting the thickness of fluid layers in the area of a foil bearing has been ongoing for nearly forty years. These expressions have been adapted to include air as the lubricating ...

    • Explicit analysis of the lateral mechanics of web spans 

      Fu, B.; Markum, R.; Reddy, A.; Vaijapurkar, S.; Good, J. K. (Oklahoma State University, 2011-06)
      All previous analyses of webs being steered through process equipment have required enforcement of assumed boundary conditions. An example is the normal entry boundary condition which has been employed in many web/roller analyses.

    • Explicit analysis of the lateral mechanics of webs transiting concave rollers 

      Vaijapurkar, S.; Good, J. K. (Oklahoma State University, 2011-06)
      All previous analyses of webs encountering spreading devices have required enforcement of assumed boundary conditions. An example is the normal entry boundary condition which has been employed in many web/roller analyses. ...

    • 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 ...