Theory of Structures
A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm², the bending strain energy stored in the bar, is

411 N mm
611 N mm
511 N mm
711 N mm

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Theory of Structures
Pick up the correct statement from the following:

All of these
In a fully plastic stage of the beam, the neutral axis divides the section in two sections of equal area
In a loaded beam, the moment at which the entire section of the beam becomes fully plastic, is called plastic moment
In a loaded beam, the moment at which the first yield occurs is called yield moment

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