The basis of power transmission in the belt drive is the belt friction equation according to Euler and Eytelwein (rope friction equation).
Mechanical power transmission Archive - tec-science
V belt drives
Which is Better: Gear Drive or Belt and Pulley Drive System
Power transmission devices
Power Transmission Drives, Types of Belts, Selection of belt drive
Slippage of the belt in belt drives - tec-science
V belt drives
Optimum belt speed for belt drives - tec-science
Power Transmitted By a Belt Drive
Belt drive Archive - tec-science
Belt or Chain: What's the Best for You?
Power transmission through Belts and Ropes