1. BFM implementation

When using a BFM whose formulation has been optimized beforehand, it is important to be aware of and take into account certain specific features of this BFM linked to the application technology adopted and the type of structure. These specificities can be broken down as follows:

• preferential fiber orientation ;

• arch" or screen effects;

• chimney" effects;

• fiber segregation ;

• fiber depletion;

• the relationship between fiber length/diameter ratio and BFM handling.