Materials Science And Engineering Properties
Materials Science And Engineering Properties
1st Edition
ISBN: 9781111988609
Author: Charles Gilmore
Publisher: Cengage Learning
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Chapter 9, Problem 9.17P
To determine

The total strain after 30 days in material.

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During a creep test (constant stress equal to 3.5 MPa) a material has an initial strain of 10 and a strain of 2 x 10* after 30 days. The same material was also submitted to a relaxation test (constant strain equal to 1.5 x 104). During the relaxation test, determine the stress after 30 days. Assume that the material follows the Maxwell model. 4 X
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A brass wire of diameter d = 2.33 mm is stretched tightly between rigid supports so that the tensile force is T = 93 N (see figure). T The coefficient of thermal expansion for the wire is 19.5 x 106/°c, and the modulus of elasticity is E = 110 GPa. (a) What is the maximum permissible temperature drop (in °C) if the allowable shear stress in the wire is 60 MPa? (Enter the magnitude.) °C (b) At what temperature change (in °C) does the wire go slack? °C
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Materials Science And Engineering Properties
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