Q: Which Wöhler coefficient to use in WAT?

A: When investigating the safety of a particular component you must select the Wöhler number for the material it is build of. When verifying the safety of the entire turbine you should select the highest Wöhler number of all components – usually that of the blades. A Wöhler number of m = 10 is a slightly conservative value for glass fiber, but please check with the manufacturer.