Elastoplastic response of a pipe bend using Prandtl operator approach in a finite element analysis

Structural components are subjected to variable thermomechanical loads during use. These can lead fatigue failure therefore it is important detect potential weak points in the structure already early stages of R&D process. Reliable results stress-strain response crucial importance structural analyses. In this paper, a metallic pipe bend load and its investigated. The reach beyond yield stress material, an elastoplastic observed. Prandtl operator approach, implemented into finite element analysis, used simulate bend. approach enables fast accurate simulations using material parameters gained from uniaxial low-cycle testing at few test temperatures. considers cyclic behaviour with multilinear kinematic hardening Comparison commonly Besseling model shows comparable path simulation, but ensures 30 % shorter computational time. Fatigue lifetime estimation differs for 4 critical control point analysed history.