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E MCH 315 (All Sections) Spring 2018 
Practice Problems for Preparation for Final Exam 
[1] A tensile specimen of initial length 100 mm and cross-sectional area 25 mm2 
is 
subjected to an axial load that produces the true stress - true strain curve shown. 
The logarithmic plot of true stress - true strain is also shown for the region beyond the yield 
point. (a) Describe the true stress-true strain behavior by determining the coefficients (σo 
and n) in the equation: σt 
= σo 
εt 
n 
 (b) D...
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