High temperature deformation and damage behavior of RAFM steels under low cycle fatigue loading: Experiments and modeling

Non-linear failure analysis of HCPB Test Blanket Module

“…However the damage continues to increase cycle by cycle among others due to portions of accumulated inelastic strains generated within the cycles. Furthermore a slight acceleration and increase in the damage rate, respectively, is indicated which is a result of the non-linearity included in the damage model [1].…”

“…7). This is because other factors, like stress and its direction influence the damage evolution in addition to the inelastic strain, what however is taken into account by the coupled deformation damage model [1] implemented in UMAT. After calculating the first cycle the simulation is continued focusing on the region with the maximum damage value and using the submodeling technique.…”

“…As for the structural material selected for the HCPB-TBM, the reduced activation ferritic martensitic (RAFM) steel EUROFER 97, no design rules have been yet established for allowing the assessment on the base of simple linear elastic structural analysis, non-linear structural analysis providing best estimations for deformation and damage is required. Therefore models describing the non-linear deformation and damage behavior of RAFM steels under fusion reactor conditions have been recently developed and successfully applied to EUROFER 97 and F82H mod [1][2][3]. Meanwhile the models are implemented in the finite element (FE) code ABAQUS providing a powerful tool for simulating the mechanical behavior of components under arbitrary loading and irradiation conditions.…”

Assessment of thermo-mechanical behavior in CLAM steel first wall structures

“…During the past decade, researchers performed a considerable amount of work on the experimental tests and finite element (FEM) simulations to examine the performances of FW under heat flux and neutron with SS316LN as a structural material [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. Hatano et al [3] examined the integrity of the HIP bonded interface, fatigue life time, and fracture behavior of the panel.…”

“…Youchison et al [18] performed stress analysis for FW by FEM codes. With EURO-FER 97 as a structural material, Aktaa et al [19,20] simulated the temperature distribution, equivalent strain and lifetime behavior.…”