(a)
The strain in the tube at time
(a)
Answer to Problem 9.20P
The strain in the tube at time
Explanation of Solution
Given:
Temperature of soda-lime glass is
Tensile stress is
Elastic modulus of glass is
Concept used:
Write the expression for elastic strain rate in material at
Here,
Calculation:
Substitute
Conclusion:
Thus, the strain in the tube at time
(b)
Total strain in the tube after one year.
(b)
Answer to Problem 9.20P
Total strain in the tube after one year is
Explanation of Solution
Given:
Value of constant
Concept used:
Refer to Figure 9.3 “The temperature dependence of the viscosity of silica glass
Write the expression for plastic strain in soda-lime glass.
Here,
Write the expression for total plastic strain in material.
Here,
Write the expression for total strain.
Here,
Calculation:
Substitute
Substitute
Substitute
Conclusion:
Thus, the total strain in the tube after one year is
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Chapter 9 Solutions
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