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4. Determine Stresses
There are normally both direct (tensile (+) or compressive (-)) and shear cyclic stresses.

For both of these determine:

  1. maximum & minimum stress
  2. mean stress
  3. alternating stress
The following table shows the nomenclature used.
Stress Direct (f ) Shear (T)
maximum f max Tmax
minimum f min Tmin
mean f m Tm