P 249 - Synthetic Wöhler lines for ferrous materials

The Synthetic Wöhler Lines of 1999 (SWL 99) are characterised in particular by the following points: • - The SWL 99 are independent of nominal stress definition and notch shape number. This represents an urgently needed breakthrough compared to all previous calculation methods currently under development - including FKM 98. They can now be applied directly to the stresses from a finite element calculation. - The breaking load and the plastic limit load are estimated with sufficient accuracy. This results in a considerably higher utilisation of the material, especially for bending and torsion. - The SWL 1999 apply to the ferrous materials St, GS, GGG, GTS and GG. - Crack initiation lines (< 1 mm crack length) and fracture root lines can be estimated. - Notes are given for the derivation of permissible values depending on the desired probability of failure The synthetic Wöhler curves are an easy-to-understand, easy-to-use and robust tool that offers great economic advantages, especially for small and medium-sized companies. The Synthetic Wöhler Lines 1999 are available as a Fortran programme with an additional graphical user user interface under Windows on CD-ROM. The characteristic values of more than 200 experimental Wöhler lines are stored in a database stored in a database. STUDIENGESELLSCHAFT STAHLANWENDUNG e.V.