Relationship between belt tension and pressure it exerts

AI Thread Summary
The discussion explores the relationship between the pulling force applied to a non-elastic belt and the pressure it exerts on an elastic object, such as a waist belt. When the belt is tightened, the force per unit length, denoted as p, and the radius r are crucial in determining the net radial force on a small arc element of the belt. The equilibrium condition is established as T = rp, where T represents the tension in the belt. This relationship indicates that the tension directly influences the pressure exerted on the elastic object. Understanding this relationship is essential for applications involving belt mechanics and tension dynamics.
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If I wrap a belt around my waist and pull, what is the relationship between the pulling force and exerted pressure to my waist?
I have following setup where a non-elastic belt is wrapped around an elastic object, like leather belt around waist. When I pull the belt with force F, it tightens around the elastic object and the belt exerts force to the elastic object. I would like to know what is the relationship between the pulling force F and the exerted pressure (or force) to the elastic object.
Wire_tension_pressure.png
 
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Take a small element of arc which subtends an angle of ##2\theta##. If the force per unit length is denoted ##p##, and the radius ##r##, then the net force on the element in the radial direction is\begin{align*}
F = 2\theta r p - 2T\sin{\theta} \sim 2\theta r p - 2T \theta
\end{align*}For equilibrium, ##T = rp##.
 
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