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pressure deformation linear relationship in a vessel

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Old   February 4, 2020, 07:35
Default pressure deformation linear relationship in a vessel
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Richardpluff
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I have a question regarding pressure vessels.

I obtained the deformation of a vessel for a given internal pressure (in fact I have to consider plasticity of the material, I used multilinear kinematic hardening)

If I use a lower internal pressure, can I establish any kind of linear relation between pressure and deformation based on my previous computation?

I guess that this has no sense in my case. But let us imagine a situation of a linear elastic analysis (Hook's law). If I compute stress for a given load (let's say a pressure of 500 bar) and later I do the same with another pressure (for example 250 bar), then I will be able to obtain a linear relation between pressure and stress in my structure, and the same applies with deformation, isn't it?

Thanks in advance
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Old   February 19, 2020, 07:38
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Erik
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If you are using linear material properties, and linear geometry (Large deformation set to off) then everything will be linear.
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