Composite microstructures and associated descriptors
Molding of Structural Composites. Theorical Aspects

Microstructure refers to the characteristics of the material's internal structure, comprising several immiscible phases of varying internal lengths. For fiber-reinforced composites, the appropriate length scales are those that reveal the partitioning of the material into continuous regions (called phases) such as individual fibers, or quasi-continuous zones such as unidirectional fiber bundles called roving. There are several important geometric elements to consider when modeling composite processes:

• Synthetic composites are reinforced by fibrous structures resulting from a manufacturing process whose aim is to build controlled periodic architectures such as fabrics (multiaxial, etc.) or totally random ones such as mats