a.
To Find: The stress if the temperature is decreased by given amount.
a.
Answer to Problem 24P
The stress if the temperature is decreased by
Explanation of Solution
Given:
Coefficient of linear expansion=
Change in temperature=
Modulus of elasticity=
Formula used:
Here,
Coefficient of linear expansion=
Change in temperature=
Modulus of elasticity=
Calculation:
Substituting the values,
Conclusion:
Therefore, the stress is
b.
To identify: Whether the ultimate strength of the steel exceeds or not.
b.
Answer to Problem 24P
The ultimate strength of steel will not exceed.
Explanation of Solution
Given:
Coefficient of linear expansion=
Change in temperature=
Modulus of elasticity=
The ultimate tensile strength of the steel is constant and its value is
Hence the ultimate steel is not exceeded.
c.
To Calculate: The stress of the concrete for the given cross-sectional area.
To identify: Whether it will fracture or not.
c.
Answer to Problem 24P
Yes, it will fracture.
Explanation of Solution
Given:
A= 0.13m2
E =
Formula used:
Here,
Coefficient of linear expansion=
Change in temperature=
Modulus of elasticity=
Calculation:
Substituting the values,
The ultimate tensile strength of the concrete is constant and its value is
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Physics: Principles with Applications
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