E F (600)тm EA EA P= 180 +a kN EA Oy B C o-e diagram of the bars 300 тm 300 тm 300 тm The rigid beam given in the figure is supported by three identical bars. Cross-sectional area of the bars are A=(4+a.b) cm and they are made of ideal elastic-perfectly plastic material. If a force P (180+a) kN is applied to the beam and removed, calculate the residual stresses in each bar. (o,-240 MPa and E=210 000 MPa)

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