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A steel flat 30mm x 15mm and 2.8m long is subjected to an axial pull of 58kn, if E=2×105N/mm2 and μ=0.30. Calculate volumetric strain and change in Volume.
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 Data: b=30mm,t=15mm,L=2.8m,P=58kN,E=2.1×103N/mm2, μ=0.30  Find: ev,δv σ=PA=58×10330×15=128.88N/mm2

ev=σE(12μ) ev=128.882.1×103×(12×0.30) ev=24.54×104
 To find δv ev=δvV δv=ev×V δv=2.454×104×2800×30×15 δv=309.204mm3

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