Machine Design
The design of shafts made of brittle materials is based on

Rankine's theory
Von Mises theory
St Venant's theory
Guest's theory

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Machine Design
Cap screws are

Slotted for a screw driver and generally used with a nut
Provided with detachable caps
Used to prevent relative motion between parts
Similar to small size tap bolts except that a greater variety of shapes of heads are available

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