In this study, the effect of temperature, aspect ratio, number of layer and
boundary conditions on critical buckling load of composite laminated plate is
investigated experimentally and numerically. Simply-Simply-Free-Free and
Clamp-Clamp-Free-Free boundary conditions, three temperatures (40°C, 60°C and
80°C) and four aspect ratio (1, 1.3, 1.5 and 2) will consider for the experimental
work. The thickness of the plate was changed by increasing the number of layer.
It can be seen that when the temperature changes from 40°C to 80°C the
maximum value of Pcr is about (225 N/mm) at (T = 40°C, a/b = 2 and NL = 4), the
minimum value of Pcr is about (11.70 N/mm) at (T = 80°C, a/b = 1 and NL = 2).
Also, it can be shown that in the case of symmetric cross ply laminate (0o/90o/0o)
when the thermal load increased by about 100 % the buckling load decrease by
about 50 % at aspect ratio equal to 1. Finally, It is shown that the critical buckling
load increases with increasing the aspect ratio at constant temperature, number of
layers and boundary conditions.