Experimental Investigation of Dynamic Behavior of Composite Sandwich Panel Using Self-healing Materials under CHARPY impact and 3-point Bending Destruction

In this research, CHARPY impact behavior of sandwich panel using the self-healing materials is considered. The sandwich panel consists of a PVC solid foam core between Carbon fibers composite faces with lay-up (0/90)s at the top and down structure. The thin glass tubes are filled by the self-healing materials and put among the composite layers of sandwich panel. The sandwich panel construction is made of handy lay-up, using Epoxy to bond the layers.
The self-healing materials with (0.5, 1, 1.5) volume fraction are used among composite layers of sandwich panel. The destruction of sandwich panel using the self-healing materials is carried out by three point bending. After destruction, the healing will be started from zero point then 3 to 7 days have been considered to determine the effect of the self-healing materials of sandwich panel. CHARPY impact test are performed on the specimens at the mentioned time to investigate the effect of the self-healing material on the impact behavior of sandwich panel.
The experimental results of CHARPY impact behavior of sandwich panel considering the self-healing materials illustrates that the most dynamic fracture toughness and healing efficiency belong to the specimen with 1.5 volume fraction after 7 days from destruction time comparing the control specimen. Using glass tubes particularly and the quantity of tubes also will be significant effect on increasing the strength of construction. By increasing the volume fraction and the time of healing, the healing efficiency of sandwich panel will be enhanced as well.