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SUMMARY:Virtual MEchanics GAthering -MEGA- Seminar: Load transmission alon
 g an elastic rod in frictional contact with a rigid cylinder
DTSTART:20210225T161500
DTEND:20210225T173000
DTSTAMP:20260408T060322Z
UID:4c4a8bca01e4654b7f18ecfb9263f8bf8fa34b753a8d9ac0572bb48e
CATEGORIES:Conferences - Seminars
DESCRIPTION:Paul Grandgeorge (fleXLab\, EPFL)\nAbstract: The Euler-Eytelw
 ein equation for the classic capstan problem is often used to model the me
 chanics of entangled filaments in frictional contact\, such as in the case
 s of ropes wound around poles or belts driven by pulleys. This modeling fr
 amework predicts an exponential tension growth along a filament of vanishi
 ng thickness and zero bending stiffness\, in frictional contact with a rig
 id cylinder. However\, in many physical settings\, the sliding filament is
  neither infinitely thin nor perfectly flexible\, thus violating the capst
 an equation’s underlying assumptions. In my talk\, I will present an enh
 anced capstan model based on Kirchhoff-rod theory\, which considers both t
 he thickness and elasticity of the sliding filament. Contrary to existing 
 adaptations of the capstan equation\, we assume that the extent of the con
 tact region between the filament and the rigid cylinder is unknown a prior
 i. Our results highlight the role of elasticity in setting the contact geo
 metry. In turn\, this nontrivial geometry strongly influences the force tr
 ansmission along the sliding filament. Specifically\, we investigate custo
 m-made elastomeric rods\, as well as engineering driving belts. Throughout
 \, we validate our modeling assumptions through a combination of FEM and p
 recision model experiments.\n\nBio: Paul Grandgeorge obtained his BSc and 
 MSc in mechanical engineering at EPFL. He then performed a Ph.D. at Sorbon
 ne Université\, at the d'Alembert Institute (Paris\, France)\, where he s
 tudied the elasto-capillary deformations of fibrous media under the effect
  of liquid droplets. Paul currently works as a postdoctoral fellow on the 
 mechanics of flexible filaments in frictional contact with Prof. Pedro Rei
 s at the Laboratory of Flexible Structures (EPFL).
LOCATION:https://epfl.zoom.us/s/84678428267 Passcode: 174387 https://epfl.
 zoom.us/s/84678428267
STATUS:CONFIRMED
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