L= 900 mm L, = 400 mm 2. 1.27 Consider the stepped bar made with a linear elastic material and subjected to an axial load of 1 kN, as shown in the figure. A, = 100 mm2 E, 2 x 105 MPa Az = 60 mm2 E = 3 x 105 MPa P= 1 kN Segments 1 and 2 have cross-sectional area of 100 mm2 and 60 mm2. Young's modulus of 2 x 105 MPa and 3 x 105 MPa, and length of 400 mm and 900 mm, respectively. The strain energy (in N-mm upto one decimal place) in the bar due to the axial load is

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