Investigation of temperature effect for nanocomposite materials subjected to high strain rate impact

الملخص EN

:The study coversthe dynamic impact response of nanocomposite Alumina and nanocomposite carbon black particlesCB N220/Epoxy at room temperatures and 150 ℃at five velocities (16.58, 18.24, 19.88, 21.54 and 23.2) m/s by using a Hopkinson Split compressive Bar (HSPB).The nanocomposites samples with (2wt.

% and 4 wt.

%) of (Alumina and CB N220) were prepared without and with (25%) of unidirectional fiber glass.

The results indicated that, maximum stress, strain and absorbed energy increased with increasing the strain rate for all types of these samples at room temperature.

When increase the temperature to 150 ℃ it noted that the all values of stress, strain, strain rate and absorbed energy decreased with respect the values at room temperature.

The determined Johnson-Cook parameters were found as the empirical fitting for data of stress (temperature, strain, and strain rate) with the curves of stress-strain, that are obtained from the compression tests.