The application of nanotechnology for ballistic protection materials

6 Three classes of filler are classified by their geometries (Thostenson et al., 2005). 

In general, these materials are classified by their geometries (Sehmidt et al., 2002) broadly, the three classes are particle, layered, and fibrous materials, as shown in Fig. 10.6 (Thostenson et al, 2005). 

Besides the great deal of experimental work on CNTs and their composites, much effort was made to elucidate the mechanical behavior of CNTs and their composites by theoretical modeUng. Two different approaches have been adopted in theoretical modeling the atomistic or bottom-up approach and the continuum mechanics or top-down approach. In the former, quantum and molecular mechanics-based modeling was used to model the tensile modulus and strength of pure CNTs and interfacial strength between CNTs and certain matrixes (Frankland et al, 2002 Gou et al, 2004 Hernandez et al, 1998 Lu, 1997 Nardelli et al, 1998). In the 

For unidirectionally reinforced composites, the elastic modulus of the composites along the longitudinal direction (in parallel mode) can be calculated by 

Considering the orientation of the fiber, the rule of mixture for the strength and modulus of the continuous fiber-reinforced composites can be represented by 

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