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Explicit analysis of the lateral mechanics of webs transiting concave rollers
(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. ...
Mechanics of cambered web belts on aligned rollers
(Oklahoma State University, 2019-06)
The lateral deformations of webs in roll-to-roll (R2R) process machines can affect the quality of the manufacturing process. Webs can enter a cylindrical roller normally if the forces required to sustain normal entry and ...
Web length creep in wound rolls
(Oklahoma State University, 2019-06)
For convenience, webs are stored in wound rolls. The available web length in a wound roll is one mark of roll quality and a concern for many who process and convert webs. Elastic winding models have proven very precise at ...
Explicit analysis of the lateral mechanics of web spans
(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.
Viscoelastic web curl due to storage in wound rolls
(Oklahoma State University, 2019-06)
While bending strains result from any web being wound at a radius of curvature into a roll, these bending strains are largest for the thicker homogeneous webs and laminates. Many webs are viscoelastic on some time scale ...
Nip mechanics of nano-impression lithography in roll-to-roll process machines
(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 ...
Impact of thickness measurement on predicting residual stresses due to winding
(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 ...
Web wrinkling resulting from moment transfer
(Oklahoma State University, 2013-06)
Considerable research has been focused on the impact of roller misalignment on web instability. Early work focused on the prediction of trough instabilities in the entering span, just upstream of the misaligned roller [1]. ...
Impact of large deformations of webs transiting rollers
(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. ...
Behavior of webs transiting crowned rollers
(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 ...