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The PRESENCE of "concentrated corner forces" at the corners of a simply-supported rectangular plate arises because:
A{'text': 'The mesh is bad in FEA', 'label': 'D'}
B{'text': 'Modeling error', 'label': 'A'}
C{'text': 'The plate is broken', 'label': 'C'}
D{'text': "Kirchhoff's effective shear consolidation leaves residual concentrated reactions at the corners — physical: the plate tends to lift at corners under transverse load", 'label': 'B'}
Answer & Solution
Correct answer: D. {'text': "Kirchhoff's effective shear consolidation leaves residual concentrated reactions at the corners — physical: the plate tends to lift at corners under transverse load", 'label': 'B'}
Combining twisting moments and transverse shears into an "effective shear" leaves an extra force at corners proportional to 2M_xy. For SS plates this is downward at all four corners; without corner restraint the plate would lift.
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