Mechanics of fibre reinforcement

J.A.H. Hult, and F.G. Rammerstorfer, Engineering Mechanics of Fibre Reinforced Polymers and Composite Structures, Springer Verlag, 1994. 

The toughening mechanism of fibre-reinforced ceramic-matrix composites is due to the pull-out phenomenon of the fibre from the matrix. For 3-D C/SiC composites three kinds of pull-out are observed from the fracture, namely the fibre pull-out, the fibre cluster pull-out and the bundle pull-out illustrated in Figure 5.12a, b and c respectively. 

It has been demonstrated that polydiacetylene single crystal fibres are relatively perfect and have excellent molecular alignment. In consequence they display high values of stiffness and strength and are very resistant to creep. It has been shown that such fibres have considerable promise as reinforcing fibres in an epoxy resin matrix and the study of such composite systems has enabled considerable fundamental information to be obtained concerning the mechanisms of fibre reinforcement. 

Applications of fracture mechanics of fibre-reinforced polymer-matrix (FRP) composites in aerospace... 

Hull [21] discusses an expression by Nielsen and Chen [22] for the calculation of the modulus of laminae containing randomly oriented fibres. The issues involved in computing the mechanical properties of short, random fibre composites, and the mechanics of fibre reinforced plastics are also discussed. 

The mechanism of fibre reinforcement of the cementitious matrix in concrete has been extensively studied in terms of the resistance of the fibres, pullout from the matrix and as a result from the breakdown of the fibre-matrix interfacial bond. Undoubtedly, the knowledge of the individual phases as well as the interface between fibre and matrix is paramount in understanding the mechanical behaviour of FRC. There are a huge number of studies on the mechanical effect of fibres in concrete. The following sections will only... 

Recent investigations [61. 623 into the behaviour of polydiacetylene fibres In epoxy resin matrices have shown that not only such composites have good mechanical properties but that Important fundamental details of the mechanisms of fibre reinforcement can also be revealed from their study. 

Aveston, J., Mercer, R.A., Sillwood, J.M., The Mechanism of Fibre Reinforcement of Cement and Concrete (Part I), National Physical Laboratory, publ. n°SI 90/11/98, January 1975. 

Guan Liqiu and Zhao Guofan, A study on the mechanism of fibre reinforcement in short steel fibre concrete, RILEM Symposium FRC86... 

R.N. Swamy, PS. Mangatand C.V.S.K Rao, The mechanics of fibre reinforcement of cement matrices . Fiber ReinforedConcrete, ACI SP-44, American Concrete Institute, Detroit, Mi, 1974, pp. 1-28. 

The first part deals with the theoretical background underlying the behaviour of FRC, including an intensive treatment of the mechanics of fibre reinforced brittle matrices and its implications for cementitious systems, taking into account the special bulk and interfacial microstmcture of FRC. 

Evans, A. G, Zok,F. W. (1994). The physics and mechanics of fibre-reinforced brittle matrix composites. Journal of Materials Science, 29,3857-3896. doi 10.1007/BF00355946. 

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