Machine Design
Plastic flow in ductile materials

Depends on other considerations
Lessens the seriousness of static loading stress concentration
Has no effect on it
Increases the seriousness of static loading stress concentration

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Machine Design
Machine screws are

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

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