engleski

Pressure vessel design safety based on viscoplastic material behaviour

Pressure vessels belong to the energy applications which may involve viscoplastic conditions under their multiaxial stress state. The design specifications will dictate a limiting design strain that are of interest for design life. According to the specific and very complex material behaviour under high temperature environment, much time and effort has been expended to describe and predict creep failure. However, in design procedure analytical solutions are not efficient while long-time creep tests are very expensive. Therefore, the presented paper deals with the finite element modelling of viscoplastic material behaviour. On the basis of this mathematical modelling as a very useful technique, the prediction of material behaviour in complex environment conditions can be obtained.

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