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A study on interactions of thin flex...

Kasikci, Tugce.

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A study on interactions of thin flexible media with grooved rollers.

Record Type:	Electronic resources : Monograph/item
Title/Author:	A study on interactions of thin flexible media with grooved rollers./
Author:	Kasikci, Tugce.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2016,
Description:	123 p.
Notes:	Source: Dissertation Abstracts International, Volume: 77-12(E), Section: B.
Contained By:	Dissertation Abstracts International77-12B(E).
Subject:	Mechanical engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10145771
ISBN:	9781369012019

A study on interactions of thin flexible media with grooved rollers.
Kasikci, Tugce.

A study on interactions of thin flexible media with grooved rollers. - Ann Arbor : ProQuest Dissertations & Theses, 2016 - 123 p.

Source: Dissertation Abstracts International, Volume: 77-12(E), Section: B.

Thesis (Ph.D.)--Northeastern University, 2016.

Tape to grooved roller interaction is modelled and analyzed by means of numerical and experimental methods. In general, air enters the tape-roller interface as the tape is transported between the reels. This phenomenon, known as air entrainment, causes air lubrication under the tape, and it could eventually lead to reduction of rigid body contact pressure. However, traction in the tape roller interface is critical for the tape to stay on a prescribed path during transport. Contact mechanics in wrapping a thin-shell (tape/web) around a grooved cylindrical surface (roller) under tension is investigated in the slow and operational tape transport speed limits.

ISBN: 9781369012019Subjects--Topical Terms:

649730
Mechanical engineering.

A study on interactions of thin flexible media with grooved rollers.
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100 1 $a Kasikci, Tugce. $3 3342819
245 1 2 $a A study on interactions of thin flexible media with grooved rollers.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2016
300 $a 123 p.
500 $a Source: Dissertation Abstracts International, Volume: 77-12(E), Section: B.
500 $a Adviser: Sinan Muftu.
502 $a Thesis (Ph.D.)--Northeastern University, 2016.
520 $a Tape to grooved roller interaction is modelled and analyzed by means of numerical and experimental methods. In general, air enters the tape-roller interface as the tape is transported between the reels. This phenomenon, known as air entrainment, causes air lubrication under the tape, and it could eventually lead to reduction of rigid body contact pressure. However, traction in the tape roller interface is critical for the tape to stay on a prescribed path during transport. Contact mechanics in wrapping a thin-shell (tape/web) around a grooved cylindrical surface (roller) under tension is investigated in the slow and operational tape transport speed limits.
520 $a In the slow tape transport speed limit, the effects of air lubrication in the tape-roller interface can be neglected. In this case the equations of equilibrium lead to analytical solutions, however; the problem is nonlinear due to the unknown nature of the contact area and location. It is shown that in case of no air entrainment, three distinct contact cases describe the interaction of the tape/web with respect to the lands. Non-dimensional analysis shows that contact state depends on the width of the groove and the land, and the non-dimensional belt-wrap pressure only modulates the amplitude of the deflected profile.
520 $a In the operational tape transport speed limit, the tape deflection, air and contact pressures are coupled to one another. The tape is modeled as a thin, translating, tensioned shell. The effects of air lubrication are modeled by using the Reynolds lubrication equation. The coupled problem, generally known as the foil bearing problem, is solved numerically by using a transient coupling algorithm. The traction characteristics of the tape-roller interface are investigated as functions of tape tension, tape transport speed and groove geometry. It was shown that air lubrication effects reduce the contact force; however the underlying effects of tape mechanics are not entirely eliminated. Unlike the classical foil bearing solution, bending of the tape into the grooves dominates the mechanics of the coupled air-lubrication/tape-deflection problem.
520 $a Tape clearance over the grooved rollers is measured experimentally by using a modified, commercially available tape transport system. A novel method to measure this clearance over rollers with helical grooves is described. Experiments show that tape-to-roller clearance increases with increasing tension and tape transport velocity. Analysis shows that the air entrainment is responsible for the velocity dependence, whereas the tension dependence is due to the tape bending into the grooves. Thus, it has been shown that the tape deflection in the lateral direction is critical for thin tapes, in order to accurately assess the contact over grooved rollers.
520 $a This work contributes to our understanding of traction mechanics of thin webs over grooved rollers, which has been understudied in the past, and helps in selecting design parameters for improved traction.
590 $a School code: 0160.
650 4 $a Mechanical engineering. $3 649730
650 4 $a Mechanics. $3 525881
690 $a 0548
690 $a 0346
710 2 $a Northeastern University. $b Mechanical and Industrial Engineering. $3 1035359
773 0 $t Dissertation Abstracts International $g 77-12B(E).
790 $a 0160
791 $a Ph.D.
792 $a 2016
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10145771