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 Subsubsection 4.6.2.4: Quintic Polynomial Up Subsection 4.6.2: Cumulative Distribution Functions Subsection 4.6.3: Damage Criterion 

4.6.2.5 Step

The material type for a step c.d.f. is “CDF step”. The following material parameters must be defined:
<mu> Parameter (same units as [ ]
<Dmax> Maximum allowable damage (optional, default is 1) [ ]
For this material the c.d.f. is given by where is the Heaviside unit step function. The step c.d.f. may be used to model fracture.
figure ../Figures/FigDamageCDFStep.png
Example:
<damage type="CDF step">
  <mu>1.0</mu>
  <Dmax>1</Dmax>
</damage>


 Subsubsection 4.6.2.4: Quintic Polynomial Up Subsection 4.6.2: Cumulative Distribution Functions Subsection 4.6.3: Damage Criterion