1. Tutorial

2. Seatwork : Mechanical Properties of Metal
The following engineering stress-strain data were obtained at the beginning of a tensile test for a 0.2% C plain-carbon steel. (a) Plot the engineering stress-strain curve for these data. (b) Determine the modulus of elasticity of this steel (c) Determine the 0.2 percent offset yield strength for this steel (d ) Elastic limit (e) Ultimate tensile strength 2

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Sample Problem # 1
Calculate the strain that will occur in a ½ in. diameter steel eyebolt that is
11 in. long when it carries a load of 2000 lb. The modulus of elasticity of steel is 30 x 10 6 psi.

4. Sample Problem # 2
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A load of 140,000 N is applied to a cylindrical specimen of a steel alloy
with a cross sectional diameter of 10mm. (a) Will the specimen experience
elastic and/or plastic deformation ? Why (b) If the original specimen length
Is 500 mm, how much will it increase in length when this load is applied.
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Sample Problem # 3
A cylindrical aluminum specimen of diameter 1.28 cm and length 10 cm
is loaded in tension to 10,000N. The yield strength of the metal is given
250 MPa and the modulus of elasticity is given to be 70 GPa. Under the condition of the force, compute the stress and the strain in the specimen.