Machine Design
Lewis equation in gears is used to find the

Tensile stress in bending
Compressive stress in bending
Shear stress
Fatigue stress

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Machine Design
In composite or reverse laid ropes

Wires in two adjacent strands are twisted in opposite direction
Wires are not twisted
Direction of twist of wires and strands are same
Direction of twist of wires in strands is opposite to the direction of twist of strands

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