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 Subsubsection 4.6.2.2: Log-Normal Up Subsection 4.6.2: Cumulative Distribution Functions Subsubsection 4.6.2.4: Quintic Polynomial 

4.6.2.3 Weibull

The material type for a Weibull c.d.f. is “CDF Weibull”. The following material parameters must be defined:
<mu> Parameter (same units as , [ ]
<alpha> Parameter ( [ ]
<Dmax> Maximum allowable damage (optional, default is 1) [ ]
For this material the c.d.f. is given by Note that which shows that is the value of at which the fraction of bonds break. Here, regulates the rate at which damage increases with increasing , with higher values of producing a more rapid increase.
figure ../Figures/FigDamageCDFWeibull.png
Example:
<damage type="CDF Weibull">
  <mu>1</mu>
  <alpha>5.0</alpha>
  <Dmax>1</Dmax>
</damage>


 Subsubsection 4.6.2.2: Log-Normal Up Subsection 4.6.2: Cumulative Distribution Functions Subsubsection 4.6.2.4: Quintic Polynomial