Name: Thermomechanics of Composites under High Temperatures
Price: 299.0 USD
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Author: Yuriy I. Dimitrienko
ISBN: 9789401591836

Thermomechanics of Composites under High Temperatures

by Yuriy I. Dimitrienko 2020-05-30 19:30:11

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The thermomechanical properties of composites on polymer matrix at high temÂ peratures are essentially different from those at normal temperatures. The main distinctions briefly consist in the following: â¢ at high temperatures there occurs an irreversible variation (degradation) of all mechanical and thermal properties of a material that usually has a complex non-linear character depending on time exposure under high temperature; â¢ there are complicated internal physico-chemical processes in a matrix and fibres under high temperatures called by the general notion of ablation; the internal physico-chemical and mechanical processes run differently in the matrix and fibres, and this leads to the appearance of considerable internal thermal stresses. Generally speaking, a composite under high temperatures can be considered as a multiphase system consisting of solid, gaseous and fluid phases interact.ing mechanically and chemically with each ot.her. There are t.hree levels of temperature: normal, elevated and high. Normal, or room temperatures are 10 - 30Â°C; elevated temperatures are 30 200Â°C; hzgh temperatures are those above 200Â°C. However, the dividing line between elevated and high temperat.ures depends on the material involved; a temperature is called high for a particular composite material if, at this temperature, irreversible internal physico-chemical transformations occur in the matrix and/ or fibres of the material. Less

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