Analyzing Torsion in Thin-Walled Rings: A Rigid Body Dynamics Approach

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    Ring Torsion
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Discussion Overview

The discussion focuses on analyzing the torsion of thin-walled rings or ovals, particularly from a rigid body dynamics perspective. Participants explore various approaches to understand the effects of applied torque on the structure.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests treating the ring as having a varying cross-section and integrating, noting that the typical Tr/J formula may not apply due to the non-circular cross-section.
  • Another participant questions whether the torque can be conceptualized as a moment that attempts to "fold" the o-ring in half and asks about the relevant boundary conditions.
  • A later reply seeks clarification on the nature of the inquiry, asking if it can be framed as a rigid body dynamics problem.

Areas of Agreement / Disagreement

Participants express differing views on how to approach the problem, with no consensus on the best method or the implications of the applied torque.

Contextual Notes

There are unresolved aspects regarding the boundary conditions and the specific characteristics of the thin-walled ring's cross-section that may affect the analysis.

dav2008
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Hello,

Does anyone have any suggestions on how to approach torsion of a thin-walled thin ring/oval?

so if this is a top view of the ring: O then the torque would be applied with the torque vector pointing as O--> (ring is fixed at the opposite end).
 
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I guess one thought is to treat it as a varying cross-section and integrate, but it's not a circular cross-section so the typical Tr/J formula wouldn't apply.
 
So the torque is really a moment that is trying to "fold" the o-ring in half?

What are the rest of the boundary conditions?
 
Last edited by a moderator:
So, what do you want to know? Can your question be answered as a rigid body dynamics problem?
 

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