Two tempered-steel bars, each 3/16 in. thick, are bonded to a 1/2-in. mild-steel bar. This composite bar is subjected as shown to a centric axial load of magnitude P. Both steels are elastoplastic with E = 29 x 106 psi and with yield strengths equal to 100 ksi and 50 ksi, respectively, for the tempered and mild steel. Determine the residual stresses in the tempered-steel bars if the load P is gradually increased from zero until the deformation of the bar reaches a maximum value om = 0.04 in. and is then decreased back to zero. Take L = 15 in. The residual stress in the tempered-steel bars is ksi. L 2.0 in. 10 F 16 in