You are requested to design a compound cylinder subjected to an internal pressure only. The cylinder is open and the ends are not constrained (i.e. a pipe connecting two chambers). Due to the internal volume requirement, the inner diameter of the cylinder must be at least 100 mm. The cylinder is subjected to a maximum internal pressure of 200 MPa. Design the cylinder to minimize the outer diameter such that the weight and cost of the cylinder can be minimized.

Any ductile material (following Tresca criterion) can be used. State clearly all assumptions made and the chosen specifications, and then describe your design process.

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