Abbas Heydari
Abstract
The thick-walled homogeneous vessel subjected to uniform internal pressure was analyzed considering finite strains to calculate the capacity increase due to work hardening behavior with respect to the Elastic-Perfectly-Plastic material model. The assumptions of linear isotropic work hardening and Tresca yield criterion are employed to model the material behavior in the plastic zone of the container. Green strain tensor including the second order terms is calculated in Cartesian coordinate system and transformed to polar coordinate system by considering θ-independent components due to the axisymmetric conditions of loading, geometry, mechanical properties and boundary; consequently, a nonlinear compatibility equation in the plastic zone of the tanker is derived. The numerical results show that the behavior of the vessel made of the material with the linear isotropic strain hardening behavior is improved and its capacity is increased.
Keywords
Elastoplastic analysis; Isotropic work hardening; Green strain; Capacity; Pressure vessel
