Zum einfluss von randbedingungen auf finite elemente kriech ergebnisse für eine doppelscherprobe

The present study investigates the influence of boundary conditions on creep finite element stress and strain results for a double shear creep specimen which was developed by Mayr et al. [1]. The results of the study show that a preliminary analysis [2], which was performed using the finite element code ABAQUS using RIGID SURFACE as a boundary condition for loading is conservative, because it predicts that a homogeneous state of shear stress is only maintained up to shear strains of the order of 10%. Using a more realistic boundary condition for loading (ABAQUS option: CONTACT PAIR) it can be shown that the homogeneous state of shear stress in the specimen is maintained throughout creep up to much higher shear strains than originally estimated. Further anisotropic finite element creep stress analysis of our double shear creep specimen will therefore be based on this more realistic loading condition.