Lab_report1_aykut - CALCULATIONS Below calculations are...

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CALCULATIONS Below calculations are made by using the stress-strain diagram. By the stress-strain curve, yield stress and yield strain values can be obtained using the 0.2 % offset method: Yield Stress: σ y = 381 Mpa Yielding Strain: ε y = 0.054 To find the modulus of elasticity of the steel the slop of the straight line before the yield point is found: E = 295 / 0.034 ~= 8676 MPa E = 8.68 GPa We can find the fracture stress, fracture strain and UTS strain values from the diagram: Fracture Stress: σ f = 361 Mpa Yielding Strain: ε f = 0.28 Strain at onset of neck (UTS strain): ε UTS = 0.17 Lets’s find the ductility in terms of percent elongation or reduction in area: % EL = (l f – l 0 ) / l 0 x 100 => l / l 0 x 100 = 20.9 / 72.5 x 100 = 28 % % RA = (A 0 – A f ) / A 0 x 100 A / A 0 x 100 = (d 0 2 - d f 2 )/ d 0 2 = ( 15.2 2 - 8.8 2 ) /15.2 2 x 100 = 66 % To find the resilience, we calculate the shaded area below the straight line before yielding occurs which we called A: There are 3162 squares in the area A (We will use it in finding toughness)
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This note was uploaded on 12/27/2011 for the course MATH 265 taught by Professor Asas during the Spring '11 term at Middle East Technical University.

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Lab_report1_aykut - CALCULATIONS Below calculations are...

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