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A part of a high-strength steel curved beam has a proportional limit of 95 ksi has the trapezoidal section shown. The beam is subjected to

A part of a high-strength steel curved beam has a proportional limit of 95 ksi has the trapezoidal section shown. The beam is subjected to a moment M = - 100 kip-in. Determine the following: (a) Determine the flexural stresses at the top and bottom surfaces (b) Determine the percentage of error if the flexure formula for a straight beam were used in (a).


  

3 in. M r=3 in. R P N.S. M

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