Question: A rigid bar ACB is supported on a fulcrum at C and loaded by a force P at end B (see figure). Three identical wires

A rigid bar ACB is supported on a fulcrum at C and loaded by a force P at end B (see figure). Three identical wires made of an elastoplastic material (yield stress ÏƒY and modulus of elasticity E) resist the load P. Each wire has cross-sectional area A and length L.
(a) Determine the yield load PY and the corresponding yield displacement ÏƒY at point B.
(b) Determine the plastic load PP and the corresponding displacement Î´P at point B when the load just reaches the value PP.
(c) Draw a load-displacement diagram with the load P as ordinate and the displacement Î´B of point B as abscissa.

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