Machine Design
The endurance limit of a material with finished surface in comparison to rough surface is

Same
More
Less
More or less depending on quantum of load

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Machine Design
Plastic flow in ductile materials

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

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Machine Design
For unequal width of butt straps, the thicknesses of butt straps are

0.75 t for both the straps on the inside and outside
0.75 t for narrow strap on the inside and 0.625 t for wide strap on the outside
0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside
0.625 t for both the straps on the inside and outside

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