A rigid bar AB, pinned at end A, is supported by a wire CD and loaded by a force P at end B (see figure). The wire is made of high-strength steel having modulus of elasticity E = 210 GPa and yield stress σY = 820 MPa. The length of the wire is L = 1.0 m and its diameter is d = 3 mm. The stress-strain diagram for the steel is defined by the modified power law, as follows:

(a) Assuming n = 0.2, calculate the displacement δB at the end of the bar due to the load P. Take values of P from 2.4 kN to 5.6 kN in increments of 0.8 kN.
(b) Plot a load-displacement diagram showing P versus δB.

2b