Explain the difference between engineering strain (or stress) and true strain (or stress).Derive the expression for how true strain is related to engineering strain. (You can findthe result in Section 6.7 of Callister, 10th edition). Also, state the relationship for how truestress is related to engineering stress (you do not need to derive this one).

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Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Explain the difference between engineering strain (or stress) and true strain (or stress).
Derive the expression for how true strain is related to engineering strain. (You can find
the result in Section 6.7 of Callister, 10th edition). Also, state the relationship for how true
stress is related to engineering stress (you do not need to derive this one).

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$let consider a specimen A_{i} = initial cross section area of the specimen load is not applied L_{i} = initial length of the specimen when load is not applied P = load apllied A_{a} = actual cross section area of the specimen when loaded L_{a} = actual length of the specimen when loaded$

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