Concept explainers
(a)
Engineering stress and engineering strain.
(a)
Answer to Problem 2.95P
The value of engineering stress is
Hence the value of engineering strain is 0.96.
Explanation of Solution
Given data:
The engineering stress and engineering strain.
A tensile load is applied to a solid bar. The bar deforms uniformly and the volume remains constant.
Calculating the initial area of the solid bar,
Calculating the final area of the solid bar,
Writing the formula for engineering stress,
Writing the formula for engineering strain,
Hence the value of engineering strain is 0.96.
(b)
True stress and true strain
(b)
Answer to Problem 2.95P
The value of true strain is 0.673.
Explanation of Solution
Writing the formula for true stress,
Writing the formula for true strain,
Hence, the value of true strain is 0.673.
(c)
The engineering stress and engineering strain when the true stress is
(c)
Answer to Problem 2.95P
The value of engineering stress is
The value of engineering strain is 0.5625.
Explanation of Solution
Now if the given condition is −
The final area can be given as,
From the true stress formula,
Hence the value of engineering stress is
From equation (1),
Hence the value of engineering strain is 0.5625.
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Chapter 2 Solutions
EBK MANUFACTURING PROCESSES FOR ENGINEE
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