Abstract
Crack tip heating in cyclically loaded short-fibre polymer matrix composites occurs by a combination of hysteretic heating and frictional heating. While the former mechanism is caused by plastic and viscoelastic deformations within the polymeric matrix, the latter is due to interfacial friction between matrix and fibres, and crack surface interference associated with crack closure. The relative contribution of these two principal mechanisms depends upon a number of variables including the viscoelastic and plastic characteristics and frictional properties of the matrix polymer, the degree of interfacial adhesion, the fibre content and fibre orientation distribution and the loading conditions. The results confirm that even in a tension/tension loading mode, frictional heating may play a dominant role, at least in some systems.
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Lang, R.W., Manson, J.A. Crack tip heating in short-fibre composites under fatigue loading conditions. J Mater Sci 22, 3576–3580 (1987). https://doi.org/10.1007/BF01161462
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DOI: https://doi.org/10.1007/BF01161462