For a steel bar deformation begins at 400mpa it has a, Ask an Expert

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For a steel bar deformation begins at 400MPa, it has a modulus of elasticity of 207GPa.

a) What is the maximum load that can be applied to a cylindrical specimen 10mm diameter and 60mm long without plastic deformation?

b) What is the maximum length it may be stretched to without plastic deformation?

I am in ENGR-250 engineering materials

I think I got part a down. I multiplied (10mm)*(60mm) = 600mm = .00060m^2, then I took 400MPa = 400x10^6GPa and multiplied the GPa with the m^2.

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