The data in Table 1.5.3 were obtained from a tensile test of a metal specimen with a rectangular cross section of
a. Generate a table of stress and strain values.
b. Plot these values and draw a bestfit line to obtain a stressstrain curve.
c. Determine the modulus of elasticity from the slope of the linear portion of the curve.
d. Estimate the value of the proportional limit.
e. Use the
(a)
The stress and strain values.
Given:
The crosssectional area is
The gage length is
Concept Used:
Write the equation to calculate tensile stress.
Here, tensile stress is
Write the equation to calculate strain.
Here, the elongation is
Calculate the stress and strain values by substituting corresponding elongation and load values in the Equation (I) and (II).
The following table shows the stress and strain values.
Load

Elongation

Stress

Stress

Strain

Strain

0.506  
1.816  
2.193  
(b)
A plot of the stressstrain curve.
(c)
The modulus of elasticity from the slope of linear portion of curve.
(d)
The value of proportional limit.
(e)
The yield stress in the metal specimen.
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