Abstract
The present paper is devoted to extending the model suggested previously (Dimitrienko, 1997) to textile composite materials at high temperatures. The model describes a degradation of elastic moduli of polymer-matrix composites in heating to high temperatures (2000°C). With the help of the model, analytical relations between elastic moduli of textile composites and elastic characteristics of their matrices and fibres, as well as geometrical structural parameters of the composites at high temperatures have been derived. Calculated results have been compared with experimental data for carbon/ and glass/phenolic composites as examples. Heat expansion and shrinkage of the composites in heating up to high temperatures have been also considered.
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