Übertragung von Schwingfestigkeitswerten mit dem statistischen Größeneinfluß

Transfer of Fatigue Life Data with the Statistical Size Effect The statistical size effect and the Basquin-equation are used to derive a function with the ability to describe the failure probability of fatigue data. Based on the results of fatigue tests the transfer of the life times to other specimens is possible. The specimens may differ in their shape and size. The assumptions, limitations and the potential of the proposed method are discussed and proved in a large experimental programme. Six specimen geometries where made of the Al-alloy 7075 T 7351 and loaded with two different load histories (Gauss, MiniTWIST). The highly stressed part of the specimens, where the cracks will originate, is characterized with stress integral. The location of the initial cracks is examined and correlated with the local stress, which is responsible for crack initiation.