calibration factor for the safety appraisal acc. to FVA 556/III

Symbol C2
Unit -
Attribute-ID calibration_factor_for_the_safety_appraisal_fva_556iii
Numeric ID 11465
Value Type PMDouble

Depending on the calibration factor c2, a safety against flank fracture can be determined. For this purpose, the reciprocal value of the maximum material exposure is formed taking the calibration factor into account.

SFB=1AFB,max+c2+c2

SFB Safety against flank fracture
AFB,max Maximum material exposure
c2 Calibration factor of safety

For the calibration value c2, Witzig suggests a value between 0 and 0.2. By default, the calibration factor c2 = 0 is used and thus corresponds to the calculation of safety against flank fracture according to FVA 556/I.

More detailed information on the calibration factors c1 and c2 can be found in the work of Witzig and Boiadjiev:

  1. Witzig, J.; Tobie, T.; Stahl, K.: Entwicklung eines erweiterten Berechnungsverfahrens zur Ermittlung optimaler Zahnflankentragfähigkeit bis in den Bereich großer Werkstofftiefen, FVA-Forschungsvorhaben 556/I, FVA-Heft Nr. 1000, Forschungsvereinigung Antriebstechnik e.V., Frankfurt, 2011.
  2. Witzig, J.: Flankenbruch – Eine Grenze der Zahnradtragfähigkeit in der Werkstofftiefe, Dissertation, 2011.
  3. Bojadiev, I., Tobie, T.; Stahl, K.: Nachrechnung Flankenbruch Kegelräder. FVA-Forschungsvorhaben 556/III, FVA-Heft 1100, Forschungsvereingigung Antriebstechnik e. V., Frankfurt, 2014.