Composite energy absorbing mechanisms

As seen in the previous sections, carbon nanotubes can improve mechanical properties and bring electrical conductivity to PVA materials. Moreover, other original properties of PVA/nanotube composites have been reported over the last years. Among them, we can cite the remarkable capability of some nanotube/PVA composites to absorb mechanical energy and shape memory phenomena that differ from traditional behaviors of other polymers. 

Energy absorbing mechanisms in composite structural elements... 

Subclass B2 is formed by the so-called structural composites, in which an outspoken mechanical reinforcement is given to the polymer. Subgroup B21 consists of blends of polymers with compatible anti-plasticizers subgroups B22 are the most important the fibre-reinforced polymer systems. The two components, the polymer matrix and the reinforcing fibbers or filaments (glass, ceramic, steel, textile, etc.) perform different functions the fibrous material carries the load, while the matrix distributes the load the fibbers act as crack stoppers, the matrix as impact-energy absorber and reinforcement connector. Interfacial bonding is the crucial problem. 

Johnson AF, David M. Failure mechanisms in energy-absorbing composite strucmres. Phil Mag 2010 90(31/32) 4245-61. 

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