التفاصيل البيبلوغرافية
| العنوان: |
Effect of Low and Elevated Temperatures on the Dissipative Properties of Woven Carbon Fiber Plastics. |
| المؤلفون: |
Boginich, O. E., Derkach, O. L., Kobzar, V. L. |
| المصدر: |
Strength of Materials; Jan2023, Vol. 55 Issue 1, p58-68, 11p |
| مصطلحات موضوعية: |
PLASTIC fibers, CARBON fibers, HIGH temperatures, LOW temperatures, POLYMERIC composites, BRAIDED structures |
| مستخلص: |
The paper presents and analyzes the results of experimental studies to determine the dissipative properties of a multilayer polymeric composite material reinforced with T300 twill weave carbon fabric in the temperature range from –140 to 230°C. The study was carried out by the method of free damped vibrations of prismatic specimens of the above material under pure bending conditions, which makes it possible to achieve uniformity of deformation along their length. The research method is described, and a block diagram of an experimental setup for the automated determination of the dissipative properties of composite materials is presented. The dependence of the logarithmic decrement of vibrations on the amplitude of cyclic strain in the range (1–10)×10–4 is taken as this characteristic. The experimental data were obtained for a braided composite along the weft, the warp, and at an angle of 45° to it. It is shown that at low temperatures (–60°C) and glass transition temperatures (130°C), the carbon fiber plastic exhibits a peak in dissipative capacity due to phase transitions in its polymer matrix. At elevated temperatures, the increase in the logarithmic decrement of carbon fiber plastic vibration is an order of magnitude greater than at low temperatures and is accompanied by a significant drop in the elastic modulus. It has been established that with an increase in the thickness of the test specimens, which is determined by the number of layers, the effect of phase transitions in the matrix on the level of energy dissipation in carbon fiber plastic is less pronounced. The obtained experimental data indicate a significant anisotropy of the characteristics of vibration energy dissipation and their dependence on the amplitude of cyclic strain. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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