A ductile specimen that has an initial length of 10 cm is tested under uniaxial loading.  If the test is under tension and the nominal strain is 21.9%,  please calculate the true strain in %.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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A ductile specimen that has an initial length of 10 cm is tested under uniaxial loading.  If the test is under tension and the nominal strain is 21.9%,  please calculate the true strain in %. 

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If the true stress is 74 MPa for the specimen described above elongated by 2.6 cm, what is the difference between nominal and true stress in MPa (absolute value)?

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