Cyclic Thermal Loading in Viscoelastic Pressure Vessels
Spherical and cylindrical vessels are considered, subjected to the simultaneous action of constant internal pressure, constant external temperature, and constant internal temperature with a superimposed cyclic temperature fluctuation. The vessel material is nonlinearly thermoviscoelastic with temperature dependent creep modulus. The influence of thermal frequency is studied for various cases of interest. A multimembrane analog of the real shell is shown to be useful in examining these effects.
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