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A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is
- a)equal to 1/10
- b)less than 1/10
- c)greater than 1/ 10
- d)none of these
Correct answer is option 'C'. Can you explain this answer?
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A pressure vessel is said to be a thick shell, if the ratio of wall th...
Understanding Thick Shell Pressure Vessels
In mechanical engineering, the classification of pressure vessels is essential for proper design and safety. One important criterion is the ratio of wall thickness to diameter.
Thick Shell Definition
- A pressure vessel is classified as a thick shell when its wall thickness is significant compared to its diameter.
- This classification is crucial for assessing stress distribution and material behavior under pressure.
Wall Thickness to Diameter Ratio
- The ratio of wall thickness (t) to diameter (D) is expressed as t/D.
- If this ratio is greater than 1/10, the vessel is considered a thick shell.
Why Greater than 1/10?
- When t/D > 1/10, the assumptions made in thin-walled pressure vessel theory (where t/D < 1/10)="" become="" />
- In thick shells, the stresses are not uniform across the wall thickness; thus, a more complex analysis is required.
- This distinction is critical for ensuring the structural integrity of the vessel under internal pressure.
Conclusion
- The classification helps engineers choose appropriate design methods and safety factors.
- Understanding the behavior of thick shells is vital for preventing failure and ensuring the safety of pressure vessels in various applications.
In summary, a pressure vessel is classified as a thick shell when the wall thickness to diameter ratio is greater than 1/10. This knowledge aids in better design and analysis practices in mechanical engineering.
In mechanical engineering, the classification of pressure vessels is essential for proper design and safety. One important criterion is the ratio of wall thickness to diameter.
Thick Shell Definition
- A pressure vessel is classified as a thick shell when its wall thickness is significant compared to its diameter.
- This classification is crucial for assessing stress distribution and material behavior under pressure.
Wall Thickness to Diameter Ratio
- The ratio of wall thickness (t) to diameter (D) is expressed as t/D.
- If this ratio is greater than 1/10, the vessel is considered a thick shell.
Why Greater than 1/10?
- When t/D > 1/10, the assumptions made in thin-walled pressure vessel theory (where t/D < 1/10)="" become="" />
- In thick shells, the stresses are not uniform across the wall thickness; thus, a more complex analysis is required.
- This distinction is critical for ensuring the structural integrity of the vessel under internal pressure.
Conclusion
- The classification helps engineers choose appropriate design methods and safety factors.
- Understanding the behavior of thick shells is vital for preventing failure and ensuring the safety of pressure vessels in various applications.
In summary, a pressure vessel is classified as a thick shell when the wall thickness to diameter ratio is greater than 1/10. This knowledge aids in better design and analysis practices in mechanical engineering.
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A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter isa)equal to 1/10b)less than 1/10c)greater than 1/ 10d)none of theseCorrect answer is option 'C'. Can you explain this answer?
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