Concept explainers
(a)
The critical length of crack if the vessel made of
(a)
Answer to Problem 45SEP
The critical length of crack is
Explanation of Solution
Write the expression for the circumferential stress or hoop stress in cylindrical vessel.
Here, the internal pressure is
Write the expression of typical fracture toughness is,
Here, fracture toughness is
Write the expression of critical length of crack for the vessel is,
Here, critical thickness of the vessel is
Conclusion:
Substitute
Refer table 7.1 “Typical fracture toughness values for selected engineering alloys”, to obtain the value of
Substitute,
Substitute
Thus, the critical length of crack is
(b)
The critical crack length if the vessel made of alloy steel
(b)
Answer to Problem 45SEP
The critical length of crack is
Explanation of Solution
Conclusion:
Refer table 7.1 “Typical fracture toughness values for selected engineering alloys”, to obtain the value of
Substitute,
Substitute
Thus, the critical length of crack is
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Chapter 7 Solutions
Foundations of Materials Science and Engineering
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