Abstract: The increase of the interest in polymer composites in technology and in people's
everyday lives has been noticed in the recent years. Producing new materials with polymer
matrix of particular properties that cannot be achieved by traditional construction materials
contributed to high interest in fibre composite materials. However, a wider use of these
materials is limited because of the lack of detailed knowledge about their properties
and behaviour in various conditions of exposure under load. Mechanical degradation
of polymer composites, which is caused by prolonged permanent loads, is connected
with the changes of the material structure that are local or that include the whole volume
of the element's body. These changes are in the form of various types of discontinuity,
including: deboning, matrix and fibers cracks and delamination. The article presents
the example of the application of acoustic emission method based on the analysis of the waves
through the use of wavelet analysis for the evaluation of the progress of the destructive
processes and the level of the degradation of composite tapes that were subject to tensile
testing.
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