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Overall safety factor

30.3
Eqn. 1
\require{color}\definecolor{myred}{RGB}{255,0,0} j_{\color{myred}ges}=\frac{j_{\color{myred}p}}{K_{\color{myred}T,p}}
Overall safety factorjges=1.5 
Safety factorjp = 1.5
Temperature factorKT,p = 1
Calc 1
Total safety factor for static proof89

Applicable only for ductile materials (A > 6%) and only applies to Rp / Rm ≤ 0.75. The equation is only to be used if the load assumption can be assumed to be sufficiently safe. These can be determined analytically or numerically or by measurement.

Schadensfolge
hoch
Schadensfolge
mittel
Schadensfolge
niedrig
jp
1.5
1.4
1.3

Only applicable at normal or short-term high temperatures.

Eqn. 2
\require{color}\definecolor{myred}{RGB}{255,0,0} K_{\color{myred}T,p}=1-1,2\cdot10^{\color{myred}-3}\cdot\frac T{°C}
Temperature factorKT,p=0.98 
TemperatureT = 20°C
Calc 2
Temperature factor fine-grain structural steel, T > 60 °C 89

The temperature factor KT,p only applies to short-term exposure to temperature.

89
Rennert, R. et alRechnerischer Festigkeitsnachweis für MaschinenbauteileVDMAFrankfurt / Main20126. Auflage
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