
(a)
The maximum possible elastic modulus in the polymer that will result in the maximum allowable clamping force.
(a)

Answer to Problem 9.22P
The maximum possible elastic modulus in the polymer that will result in the maximum allowable clamping force is
Explanation of Solution
Given:
The length of the polymer is
The change in length of the polymer is
The maximum clamping force is
Formula Used:
Write the expression for the strain in the polymer as:
Here,
Write the expression for the stress acting on the polymer as:
Here,
Write the expression for the elastic modulus in the polymer as:
Here,
Calculation:
Substitute
Substitute
Substitute
Conclusion:
Thus, the maximum possible elastic modulus in the polymer that will result in the maximum allowable clamping force is
(b)
The minimum allowable viscosity of the polymer.
(b)

Answer to Problem 9.22P
The minimum allowable viscosity of the polymer is
Explanation of Solution
Given:
The length of the polymer is
The change in length of the polymer is
The maximum clamping force is
Formula Used:
Write the expression for the relation of viscosity and decay of stress.
Here,
Calculation:
Substitute
Conclusion:
Thus, the minimum allowable viscosity of the polymer is
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Chapter 9 Solutions
Materials Science And Engineering Properties
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