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Homework answers / question archive / A filament wound E-glass/epoxy pressure vessel has a diameter of 100 cm, a wall thickness of 5 mm and a helical winding angle of 54

A filament wound E-glass/epoxy pressure vessel has a diameter of 100 cm, a wall thickness of 5 mm and a helical winding angle of 54

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A filament wound E-glass/epoxy pressure vessel has a diameter of 100 cm, a wall thickness of 5 mm and a helical winding angle of 54.74? .

(a) Using netting analysis (assume the fibres take all of the load, and uniformly stressed in tension) and a safety factor of 2, estimate the upper allowable internal pressure in the vessel. The tensile strength of E-glass is 3448 MPa.

(b) Compare this to the upper allowable internal pressure in a vessel of identical dimensions fabricated from 6061 aluminium alloy, whose yield stress is 276 MPa. Use the von Mises yield criterion to determine the upper allowable internal pressure of the aluminium vessel. Comment on your results. For plane stress, the von Mises stress is calculated by: σ 2 yield = σ 2 1 − σ1σ2 + σ 2 2

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