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4 cards from this section. Quick, good the night before a test.
Define hoop stress in your own words.
Think about how pressure affects the walls of a cylinder.
What is the formula for calculating hoop stress in thin-walled cylinders?
Remember P.R.T. - Pressure, Radius, Thickness.
What is the formula for calculating hoop stress in thin-walled cylinders?
Think about how the radius and thickness are involved in the calculation.
True or False: In thick-walled cylinders, the hoop stress is constant throughout the thickness.
Consider what happens to stress as you move from the inner to the outer wall.
A steel cylinder is designed to withstand an internal pressure of 800 kPa with an internal radius of 20 cm and a wall thickness of 3 cm. Calculate the hoop stress and determine if the design meets a safety factor of 2.
Remember to consider the safety margin when calculating.
A cylindrical tank has a radial temperature gradient causing uneven thermal expansion. If the inside temperature is 200°C and the outside is 20°C, calculate the thermal stress given E=200 GPa and α=12 x 10^-6 /°C.
Use the coefficients correctly to express temperature differences.
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