Machine Design
Plastic flow in ductile materials

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

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Machine Design
In order to determine the stresses in a thin cylinder due to an internal pressure, it is assumed that

The effect of curvature of the cylinder wall is neglected
The tensile stresses are uniformly distributed over the section of the walls
All of these
The effect of the restraining action of the heads at the end of the pressure vessel is neglected

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