Discussion
Clamping the unloaded edges of a long plate raises its buckling coefficient from about \( 4 \) to about \( 7 \). The buckling stress rises by a factor of
Answer: D
The stress is directly proportional to the coefficient, so the factor is \( 7/4 = 1.75 \). Real riveted edges provide partial restraint and fall between the simply supported and clamped ideals, so an intermediate value is normally assumed.
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