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The tension bar of 5m long is made up of two parts 3 m of its length has a cross-sectional area of 10cm2 while the

The tension bar of 5m long is made up of two parts 3 m of its length has a cross-sectional area of 10cm2 while the remaining 2m has a cross-sectional area of 20 cm2. An axial load of 80kN is gradually applied. Find the total strain energy produced in the bar and compare this value with that obtained in a uniform bar of the same length and have the same volume when under the same load. Take E = 2x105 N/mm2

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