Fatigue strength of selected spring steels has been determined with a resonant pulzator. The corresponding S-N curves were also constructed. Simultaneously, structural testing of real double-leaf springs for trucks was performed at selected conditions of fatigue and their life time was determined. FEM numerical based simulation of the notch effect in V-notched specimens and fatigue life-time prediction of leaf springs has also been performed and presented.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 702890The FEM has been used for the numerical simulation of stress and strain distribution in V-notched specimens as well as the calculation of stress concentration and notch-sensitivity factors. FEM simulation of fatigue has also been used for the prediction of life time of springs, taking into the account the mechanical properties of spring steel and conditions of fatigue. The calculated life time of the springs is in a good agreement with its real life time obtained with the structural testing of real leaf springs for trucks.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 789418The prediction of fatigue life of components by FEM calculation is a common step within the design process of machine. Loads are mostly described by means of load spectra. The information about the strength behaviour of the material is based on test results and in our case described by S/N curves. Fatigue tests on notched specimens longitudinal and perpendicular relative to rolling direction and two HT conditions were carried out. According to obtained fatigue results it is obviously that segregation orientation has the most important influence on the fatigue behaviour of the spring steels.
B.03 Paper at an international scientific conference
COBISS.SI-ID: 844202