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Complete the preceding Pressure Vessel 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, at what location will the pressure vessel likely yield first according to the ANSYS solution? Consider all stress components when answering.

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