Browsing by Title
Now showing items 74046-74065 of 84820
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Wound roll stress analysis including air entrainment and the formation of roll defects
(Oklahoma State University, 1995-06)Numerous procedures have been developed to determine the stresses inside wound rolls of film. These typically use factors such as winding tension, film thickness and film properties to calculate the stresses. The calculation ... -
Wound roll stresses from displacement measurements
(Oklahoma State University, 1991-05)Previous wound roll models required a known Wound-In-Stress boundary condition that is easily obtainable only for the restrictive case of pure center winding with measured incoming web tension and caliper. A new boundary ... -
Wound roll structures and practical applications
(Oklahoma State University, 2019-06)Winding is an integral process in the manufacturing and converting of nearly all web materials such as paper, film, tissue, nonwovens, aluminum and steel. Wound rolls are the most convenient, economical, and most prevalent ... -
Wound-in-tension in a non-woven web
(Oklahoma State University, 2005-06)Literature on wound roll structure of non-homogeneous webs is scarce. Experimental and analytical research on wound roll structure of homogeneous materials such as plastic films and paper has been reported extensively, ... -
Wound-on-tension for two drum winders
(Oklahoma State University, 2003-06)The two drum winder remains to be a high productivity winder for rewinding some paper and nonwoven webs at very high speeds. Winding models of varied capabilities exist for center winders, center winders with rider rollers, ... -
Wound-on-tension of winders with nip rollers
(2016-12)Roll-to-roll (R2R) manufacturing is widely used to create products from traditional web materials such as plastic webs, metal foils, to the recent printed and flexible electronics. Winding or rewinding is a critical component ... -
Wounded worldviews : A terror management perspective on combat veterans
(2013-07)Previous research has demonstrated that individuals that have experienced trauma respond atypically to reminders of mortality. The present research tested the hypothesis that United States military veterans would respond ... -
Wright City : a report to the nation.
(1942?) -
Wrinkle dependency on web roller slip
(Oklahoma State University, 1995-06)The shear forces in a web introduced from an untrammed roller create wrinkles that are affected by web twisting or slipping on the upstream roller. The web span bounded between the untrammed and upstream rollers behaves ... -
Wrinkle initiation and development in heated webs on drums
(Oklahoma State University, 2013-06)Wrinkles often occur in webs heated on drums and rollers. Anecdotal evidence from vacuum metalizers suggests that wrinkles are initiated by small grit particles or surface imperfections that lift the web off the drum. An ... -
Wrinkle-free conveyance in nips
(Oklahoma State University, 2005-06)Wrinkling in nips with ultra-thin webs is empirically studied. In web converting, nips are used for tension isolation drives, gravure coaters, prevention of air entrainment on rollers and winding rolls, calendaring, ... -
Wrinkling mechanisms of webs with spatially varying material properties
(Oklahoma State University, 2017-06)Webs often include variation in caliper or modulus of elasticity as a result of manufacturing variation. Light-weight nonwoven webs are especially prone to these issues because the variation is proportionally more, relative ... -
Wrinkling of Composite-facing Sandwich Panels Under Biaxial Loading
(Journal of Sandwich Structures and Materials, 2004-05-01)The problem of face wrinkling in sandwich structures was identified as an important failure mode and first analyzed in 1940 by Gough et al. [1], who used a Winkler-type elastic foundation to model the core. This work was ... -
Wrinkling of foils
(Oklahoma State University, 2011-06)Aluminum and copper metal webs less than 150 microns (6-mils) are considered foils. Demand for aluminum and copper foils are growing, driven by growing markets for flexible electronics, flat panel displays, lithium batteries, ... -
Wrinkling of Webs Approaching Heated Rollers
(Oklahoma State University, 2011-05-01)There are several reasons webs wrinkle when passing over rollers. Some of the reasons for wrinkles on web are roller misalignment, tapered rollers, decrease in web tension, difference in web thickness etc. The scope this ... -
Wrinkling of webs due to twist
(Oklahoma State University, 1999-06)Webs are often required to endure twisting in web process machinery. There is a limit to the degree to which the web can be twisted prior to wrinkling. The objective of this publication is to document a closed form technique ... -
Wrinkling of webs on rollers and drums
(Oklahoma State University, 2005-06)Wrinkles are frequently observed in thin webs wrapping rollers, winding cores, and drums in vacuum coaters. They are the buckling response of the web to compressive deformation in the transverse direction (TD), which may ... -
Wrinkling of wide webs
(Oklahoma State University, 2011-06)Wrinkling remains one of the top causes of converting process waste. Though wrinkles created by roller misalignment and web bending (shear wrinkles) are well-understood, nearly all the published research and modeling has ...