The results of a tensile test are shown in Table 1.5.2. The test was performed on a metal specimen with a circular cross section. The diameter was
a. Use the data in Table 1.5.2 to produce a table of stress and strain values.
b. Plot the stressstrain data and draw a bestfit curve.
c. Compute the, modulus of elasticity from the initial slope of the curve.
d. Estimate the yield stress.
(a)
The stress and strain values.
Given:
The diameter of metal specimen is
The gage length is
Concept Used:
Write the equation of tensile stress.
Here, tensile stress is
Write the equation to calculate strain.
Here, the elongation is
Calculation:
Calculate the crosssectional area.
Here, the diameter of metal specimen is
Substitute
Calculate the stress and strain values by substituting corresponding elongation and load values in the Equation (I) and Equation (II).
The following table shows the stress and strain values.
Load

Elongation

Stress

Stress

Strain

Strain

(b)
A plot of the stressstrain curve.
(c)
The modulus of elasticity from the initial slope of curve.
(d)
The yield stress in the metal specimen.
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