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

Now showing items 21-40 of 46

    • Impact of large deformations of webs transiting rollers 

      Shi, Jinxin; Markum, Ron E.; Good, J. K. (Oklahoma State University, 2017-06)
      Webs are subjected to large out-of-plane deformations when transiting rollers in process machinery. Webs are often treated as membranes in analysis but become subject to significant bending strains when transiting rollers. ...

    • Impact of thickness measurement on predicting residual stresses due to winding 

      Good, J. K.; Mollamahmutoglu, C.; Markum, R.; Gale, J. W. (Oklahoma State University, 2015-06)
      Axisymmetric winding models were initially developed to deal with web thickness variations that were manifested in the machine and cross machine direction. The web thickness variation is a prime input to these models. Small ...

    • Importance of torque capacity in predicting crepe wrinkles and starring in wound rolls 

      Good, J. K.; Vaidyanathan, N. (Oklahoma State University, 1995-06)
      Roll models provide information about the radial stresses and circumferential stresses that exist in a wound roll of web material. A derived quantity that is available from the radial stress profile is the torque capacity. ...

    • 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 ...

    • 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 ...

    • Mechanics of grooved flexible spreader rolls 

      Good, J. K.; Markum, R. (Oklahoma State University, 2007-06)
      All known web spreading hardware work based upon one of three principles. Sometimes it is unclear which principle(s) apply to a given spreading device. The flexible spreader roller is such a device. In this paper we will ...

    • Modeling nip induced tension in wound rolls 

      Good, J. K. (Oklahoma State University, 2001-06)
      Web materials are wound into coils by a variety of winders. Some winders center wind only. In this type of winding torque is provided to a core and web winds up on the core. Other types of winders have a roller, often ...

    • Modeling rubber covered nip rollers in web lines 

      Good, J. K. (Oklahoma State University, 2001-06)
      Rubber covered nip rollers have a number of applications within web lines. Rubber covered rollers are often used to nip the web against a metal surfaced roller that is driven to achieve a certain web velocity or web tension. ...

    • Modeling wound rolls using explicit FE methods 

      Kandadai, B. K.; Good, J. K. (Oklahoma State University, 2007-06)
      A new method of wound roll analysis using an explicit finite element formulation is presented in this paper. The stresses developed in center wound rolls with and without an undriven nip roller are discussed and compared ...

    • New method for measurement of wound-in-tension in webs wound into rolls 

      Good, J. K.; Kandadai, B. K.; Markum, R. (Oklahoma State University, 2007-06)
      The Wound-In-Tension (WIT) is the tension in the outermost layer of a winding roll. The Wound-In-Tension is an important parameter that controls the stresses inside the wound roll which in turn determines the quality of ...

    • Nip impinged center-winding including a nonlinear beam model 

      Mollamahmutoglu, C.; Good, J. K.; Markum, R.; Gale, J. W. (Oklahoma State University, 2017-06)
      Nip pressure is commonly applied in winding processes in order to maintain structural stability and prevent air entrainment at high speeds. In nip induced winding modeling nip and roll are assumed to be beams with ...

    • Nip mechanics of nano-impression lithography in roll-to-roll process machines 

      Ren, Yao; Good, J. K. (Oklahoma State University, 2017-06)
      Nano-Impression Lithography (NIL) has been demonstrated to produce nano features on webs that have value to society. Such demonstrations have largely been the result of NIL processes that involve the discrete stamping of ...

    • Nonlinear orthotropic viscoelastic winding model 

      Qualls, W. R.; Good, J. K. (Oklahoma State University, 1995-06)
      A realistic and adaptive viscoelastic model for prediction of transient wound roll stress distributions is presented. The web material is taken to be orthotropic with a nonlinear radial creep compliance dependent upon ...

    • Predicting web wrinkles on rollers 

      Good, J. K.; Beisel, J. A.; Yurtcu, H. (Oklahoma State University, 2009-06)
      There are two levels of web instability in web lines. The first level of web instability is called web troughs. Web troughs are due to the instability of webs that occur in free web spans. Web troughs have been shown to ...

    • Pseudo 3D viscoelastic winding model 

      Yu, Haowen; Poh, Edmond; Good, J. K.; Lu, Hongbing (Oklahoma State University, 2007-06)
      A pseudo 3D winding model that has considered orthotropic viscoelastic effects during winding and storage has been developed and implemented in a code revised from the 2D viscoelastic winding code developed by Qualls and ...

    • Shear in multispan web systems 

      Good, J. K. (Oklahoma State University, 1997-06)
      Wrinkling research has been concentrated in past years on understanding web wrinkling in isolated spans in web lines [1]. It is expected that some of the fundamentals which govern single span behavior will also apply to ...

    • Shear wrinkling in isolated spans 

      Good, J. K.; Kedl, D. M.; Shelton, J. J. (Oklahoma State University, 1997-06)
      Web wrinkling is a problem which plagues the web process industry. Most webs are quite thin, on the order of 4-150 μm, and become subject to lateral shear during transport either by misaligned rollers or by guide rolls. ...

    • Stresses within rolls wound in the presence of a nip roller 

      Good, J. K.; Wu, Z.; Fikes, M. W. R. (Oklahoma State University, 1991-05)
      Models which can be used to calculate the internal stresses within wound rolls of web material have all been confined to the center winding technique to date. In this publication a new boundary condition is presented which ...

    • Surface compression of wound rolls 

      Mollamahmutoglu, C.; Ganapathi, S.; Good, J. K. (Oklahoma State University, 2013-06)
      Stress levels and profiles in the vicinity of contact between a wound roll and a nip or a rigid surface are important for the quality of the product during manufacturing or storage stages. Excessive or insufficient pressure ...

    • Tension allocation in three dimensional wound roll 

      Hoffecker, P.; Good, J. K. (Oklahoma State University, 2005-06)
      Much consideration has been given to the relationship between web line tension and the stresses they induce in three dimensional wound rolls. Three dimensional wound rolls are distinctive because their radial and circumferential ...