High strength fiber reinforced composites

Brink, A. E., Owens, J. T., Oshinski, A. J. and Pecorini, T. J., Process for preparing high strength fiber reinforced polymer composites, US Patent 6 048 922, 2000. 

Composite solids include high-strength fiber-reinforced polymers for golf clubs and tennis rackets flexible barriers, such as GoreTex jackets, that repel water droplets, but which permit the passage of air and controlled dmg-release devices, which will be discussed in section 11.4. 

M. G. Bader and W. H. Bowyer, An Improved Method of Production for High Strength Fiber-Reinforced Thermoplastics , Composites (July 1973). 

V. Bindiganavile, N. Banthia and B. Aarup, Impact response of ultra-high-strength fiber-reinforced cement composite . Ad Mater. J. 99, 2002, 543-548. 

Prediction of the strength of fiber-reinforced composite materials has not achieved the near-esoteric levels of the stiffness predictions studied in the preceding sections. Nevertheless, there are many interesting physical models for the strength characteristics of a matrix reinforced by fibers. Most of the models represent a very high degree of integration of physical observation with the mechanical description of a phenomenon. 

In fiber-reinforced composites the deformation of the matrix is then used to transfer stresses by means of shear tractions at the fiber-matrix interface, to the embedded high-strength fibers. On the other hand, fibers retard the propagation of cracks and thus produce a material of high strength. 

The use of advanced composites has increased significantly in the last decade. The properties of high-specific strength and stiffness make composites ideal for many aerospace, automotive, and infrastructure applications. Fiber-reinforced composites, which commonly use thermosetting resins such as epoxies as the matrix material, have some inherent deficiencies. These include the need for multistep processing, limited shelf-life, low toughness, sensitivity to moisture, and the inability to reprocess or reform the material [1]. 

Figure 8. Mechanical properties of various carbon-fiber-reinforced composites compared to bone and some biomedical alloys (20). HM and HT refer, respectively, to fibers of high modulus and high tensile strength.

Directional solidification to produce fiber reinforced composites with high strength and elastically stiff discontinuous Ti5Si3 fibers aligned with the solidification direction. 

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