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9th Edition

Barry J. Goodno + 1 other

Publisher: Cengage Learning

ISBN: 9781337093347

Chapter 7, Problem 7.7.26P

Textbook Problem

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- 7.2-26 The strains on the surface of an experiment al device made of pure aluminum *(E *= 70 GPa. *v *= 0.33) and tested in a space shuttle were measured by means of strain gages. The gages were oriented as shown in the figure. and the measured strains were = 1100 * X *106,

What is the stress *o *in the *x *direction?

To determine

The stress along x-direction.

**Given information:**

The strain in gauge A is

Write the expression for transformation for plain strain.

Here, strain in gauge is

Write the expression for the stress along x-direction using Hooks law.

Here, Young modulus is

**Calculation:**

Substitute

Here, strain in gauge A is

Substitute

Substitute

Mechanics of Materials (MindTap Course List)

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