Essentials of Materials Science and Engineering, SI Edition
Essentials of Materials Science and Engineering, SI Edition
4th Edition
ISBN: 9781337672078
Author: ASKELAND, Donald R., WRIGHT, Wendelin J.
Publisher: Cengage Learning
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Chapter 6, Problem 6.29P
Interpretation Introduction

Interpretation:

The dimensions of the polymer bar are 1in× 2in×15in. The modulus of elasticity of bar is 600,000psi. Value of force which is required to stretch the bar from 15 into 15.25 in is to be determined.

Concept introduction:

The concept of strain, stress and Hooke's law will be used. The formula of strain and Hooke's law is given below -

  e(engg.strain)=Δll

The relation between true strain and engineering strain is given as-

ε=ln(1+e)

σ(stress)=FA

And Hooke's law-

σε

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Essentials of Materials Science and Engineering, SI Edition

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