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5. Interactions between damage and behavior
When damage occurs, the material becomes porous and therefore compressible. Two approaches are generally proposed to account for changes in its mechanical behavior:
introduction of a macroscopic damage variable ;
the use of specific plasticity criteria.
5.1 Macroscopic damage variable
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The stress exerted on a surface S subjected to a perpendicular force F is expressed by the relation :
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Interactions between damage and behavior
Ductile fracture criteria
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