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Engineering and Tech / Mechanics of Materials 7 / Chapter 2 / Problem 2.61

Mechanics of Materials | 7th Edition | ISBN: 9780073398235 | Authors: Ferdinand P. Beer; E. Russell Johnston Jr.; John T. DeWolf; David F. Mazurek

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A standard tension test is used to determine the

Chapter 2, Problem 2.61

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QUESTION:

A standard tension test is used to determine the properties of an experimental plastic. The test specimen is a \(\frac{5}{8}-\mathrm{in} .\)-diameter rod and it is subjected to an 800-lb tensile force. Knowing that an elongation of 0.45 in. and a decrease in diameter of 0.025 in. are observed in a 5-in. gage length, determine the modulus of elasticity, the modulus of rigidity, and Poisson’s ratio for the material.

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QUESTION:

A standard tension test is used to determine the properties of an experimental plastic. The test specimen is a \(\frac{5}{8}-\mathrm{in} .\)-diameter rod and it is subjected to an 800-lb tensile force. Knowing that an elongation of 0.45 in. and a decrease in diameter of 0.025 in. are observed in a 5-in. gage length, determine the modulus of elasticity, the modulus of rigidity, and Poisson’s ratio for the material.

ANSWER:

Step 1 of 5

The area of the test specimen

Tensile force,

Normal stress ,

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