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Section 4.6: Reactive Damage Mechanics Up Section 4.6: Reactive Damage Mechanics Subsection 4.6.2: Cumulative Distribution Functions

### 4.6.1 General Specification of Damage Materials

The material types for damage materials are “elastic damage” and “uncoupled elastic damage”. The following parameters must be defined:
 Specification of the elastic material Specification of the cumulative distribution function Specification of the damage criterion
The <elastic> tag encloses a description of the constitutive relation of the intact elastic material and associated material properties, as may be selected from the list provided in Section 4.1.3↑ for unconstrained materials (used with “elastic damage”) and Section 4.1.2↑ for uncoupled materials (used with “uncoupled elastic damage”). The <damage> tag encloses a description of the cumulative distribution function and associated material properties, as may be selected from the list presented in Section 4.6.2↓. The <criterion> tag encloses a description of the damage criterion, as may be selected from the list presented in Section 4.6.3↓.
Example:
<material id="1" type="elastic damage">
<elastic type="neo-Hookean">
<density>1</density>
<E>0.13</E>
<v>0.3</v>
</elastic>
<damage type="CDF Weibull">
<alpha>8</alpha>
<mu>0.3</mu>
<Dmax>1</Dmax>
</damage>
<criterion type="DC max normal Lagrange strain">
</criterion>
</material>


Section 4.6: Reactive Damage Mechanics Up Section 4.6: Reactive Damage Mechanics Subsection 4.6.2: Cumulative Distribution Functions