Yielding and Elastoplastic Deformation of Annular Disks of a Parabolic Section Subject to External Compression


Abstract: A computational model is developed to predict partially plastic stresses in variable thickness annular disks subject to radial compression. The model is based on the von Mises' yield criterion, deformation theory of plasticity and a Swift type hardening law. Considering a thickness profile in the form of a general parabolic function, the condition of occurrence of plastic deformation at the inner and outer edges of the annular disk is investigated. A critical disk profile is determined and the corresponding elastic-plastic stress as well as the residual stress distribution is computed.

Keywords: Variable thickness, External pressure, Nonlinear hardening, Residual stresses, von Mises criterion

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