Thermomechanics of Composites Under High Temperatures

By Yu I. Dimitrienko

Book Overview

The thermomechanical properties of composites on polymer matrix at high tem- peratures are essentially different from those at normal temperatures. The main distinctions briefly consist in the following: - 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; - 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 - 30 C; elevated temperatures are 30 200 C; hzgh temperatures are those above 200 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.

• Format: Paperback
• Language: English
• ISBN: 9048151228
• ISBN13: 9789048151226
• Release Date: December 2010
• Publisher: Springer
• Length: 352 Pages
• Weight: 1.15 lbs.
• Dimensions: 0.8" x 6.1" x 9.2"