TSN79 said:I'm looking at a table of fatigue strengths for different steels. I would like to know what the figures mean. For instance, for S235 under streching/pressure it says [tex]0\pm160[/tex] and [tex]130\pm130[/tex]. I believe the values are supposed to be average tension pluss/minus amplitude tension, but I'm not sure.
A table of fatigue strengths for different steels is a reference tool that shows the maximum stress a particular type of steel can withstand before failing under repeated loading and unloading cycles.
A table of fatigue strengths is important because it helps engineers and designers determine the appropriate type of steel to use for a specific application, taking into account the expected loading conditions and the desired service life of the product.
The fatigue strength of a steel can be affected by various factors such as the chemical composition of the steel, its microstructure, surface finish, and any surface treatments or coatings applied to it. The loading conditions, temperature, and environmental conditions also play a role in determining the fatigue strength of a steel.
A table of fatigue strengths is created through extensive laboratory testing, where different types of steel are subjected to various loading conditions and the number of cycles to failure is recorded. The results are then compiled and organized into a table for easy reference.
No, a table of fatigue strengths is specific to the type of steel being tested. Each steel has its own unique properties and characteristics that can affect its fatigue strength. Therefore, it is important to use the correct table for the specific type of steel being used.