Machine Design
The ratio of belt tensions (p1/p2) considering centrifugal force in flat belt is given by Where m = mass of belt per meter (kg/m) v = belt velocity (m/s) f = coefficient of friction a = angle of wrap (radians)

(P1 - mv²)/ (P2 - mv²) = e–ᶠα
P1 / P2 = e–ᶠα
P1 / P2 = eᶠα
(P1 - mv²)/ (P2 - mv²) = eᶠα

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Machine Design
According to Rankine's theory, the failure occurs at a point in a member

When the maximum shear stress in a biaxial stress system reaches the shear stress at elastic limit in a simple tension test
When the strain energy per unit volume in a biaxial stress system reaches the strain energy at the elastic limit per unit volume as determined from a simple tension test
When the maximum principal strain in a biaxial stress system reaches the strain at the elastic limit as determined from a simple tension test
When the maximum principal stress in a biaxial stress system reaches the elastic limit of the material in a simple tension test

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Machine Design
The designation M 33 × 2 of a bolt means

Metric threads with cross-section of 33 mm
Bolt of 33 mm nominal diameter having 2 threads per cm
Metric threads of 33 numbers in 2 cm
Metric threads of 33 mm outside diameter and 2 mm pitch

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