ENERGY-DISSIPATION HYPOTHESIS FOR STRENGT H CALCULATION AT MULTIAXIALFATIGUE

A method called energy dissipation hypothesis is developed to estimate the fatigue life for metallic materials under multiaxial, stochastic loads. The energy dissipation is calculated for every cycle of the var ious deviatoric stresses and of the hydrostatic stress. The influence of the mean stress components on the material behaviour is modeld usin g a simple closed form solution, which needs neither to integrate diff erent orientations nor to determine of a critical orientation. This pa per the hypothesis is used for periodic load cases and compared with e xperimental data.