Impact load influence on hardened polymer composite materials with metal elements built in the structure after microwave electromagnetic field treatment

Abstract

During the operation of air and land transport systems, as well as of small-sized vessels, the possibility of influence on their load-bearing structures and dynamic loads shell, including those initiated by a solid body impact, is high. Currently, a significant part of the structural elements of these products is made of fiber-reinforced polymer composite materials (PCM). Impact force is transmitted to the load bearing structures through the PCM product and can lead to the destruction of the connection and damage to the structures themselves. The structure of the PCM includes metal constructions in the form of grids and cellular elements, which creates additional stress concentrators and can affect the perception of shock loads. The studies of the perception of shock load by samples from hardened carbon plastics with a lightning-resistant copper mesh inbuilt in the surface layer and three-layer structures with intermediate cellular elements after their processing in a microwave electromagnetic field were carried out. The obtained results indicate the redesign of the matrix after exposure to a microwave electromagnetic field, and can be used in the development of technologies for final processing of the products made of PCM to increase their resistance to impact force.