The capstan equation or belt friction equation, also known as the Euler-Eytelwein formula describes the tension required to cause slippage of a flexible line (such as a rope, wire rope, or a belt) that is wound around a cylinder and tensioned on its opposite side. Flexible lines tensioned on curved surfaces create normal forces and corresponding friction forces, resulting in a greater load required to cause slip than the load holding it taut.
The capstan equation or belt friction equation, also known as the Euler-Eytelwein formula describes the tension required to cause slippage of a flexible line (such as a rope, wire rope, or a belt) that is wound around a cylinder and tensioned on its opposite side. Flexible lines tensioned on curved surfaces create normal forces and corresponding friction forces, resulting in a greater load required to cause slip than the load holding it taut.
Source: Wikipedia "Capstan equation" · CC BY-SA 4.0
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