Strain test and analysis of composite laminated plate under laser irradiation

The change in strain of T300/AG80 carbon fiber composite laminated plates were tested under laser irradiation. The strain in three directions of 0,45 and 90 of the samples under laser beams with various radii were recorded by the dynamic strain testing apparatus. With the effects of temperature eliminated, the presented data show that, the strain decreases with the increase of the distance to the center of laser spot. After the laminates are irradiated for 5 seconds, the maximum strain is found in the direction of 90 and is at least 1.5 times larger than the minimum strain in the direction of 0. The thermal stress at every point decreases as the distance to the spot center increases. The experiment process was simulated with finite element analysis softwa