Machine Design
The effective stress in wire ropes during normal working is equal to the stress due to

Acceleration/retardation of masses plus stress due to bending
Axial load plus stress due to acceleration/retardation
Bending plus stress due to acceleration/retardation
Axial load plus stress due to bending

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Machine Design
For same pulley diameters, center distance, belt speed and belt and pulley materials,

Power transmission does not depend upon open and crossed types of constructions
Open and crossed belt drives transmit same power
Crossed belt drive transmits more power than open belt drive
Open belt drive transmits more power than crossed belt drive

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