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Exercises

Complete the preceding Pressure Vessel

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in ANSYS tutorial before attempting the following exercises. 

Exercise 1:

For According to thick-walled pressure vessel theory, for what average-radius-to-thickness (R_i + R_o)/2t will the ratio of hoop stress at the inner radius,  R_i, be 10% larger than the hoop stress at the outer radius, R_o? We may decide this represents a reasonable definition for one's "line in the sand", i.e. a ratio below which thick-walled theory should be considered more accurate for validation purposes.

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Using a distortional strain energy criterion valid for ductile materials, at what location will the pressure vessel likely yield firstaccording to the ANSYS solution? Consider all stress components when answering.

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Using the same distortional strain energy criterion valid for ductile materials, at what location will the pressure vessel likely yield first according to the ANSYS solution? Consider all stress components when answering.

Investigate catastrophic failures in Aluminum 80 SCUBA tanks and comment on your findings relative to these failures.

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