Modeling of High-Speed Interaction of Composite Barrier and Steel Striker

Abstract

AbstractNumerous studies, carried out in the field of reinforcement of building constructions with composite materials using carbon composites, necessitate the creation of adequate mathematical models and methods of strength analysis of such structures under the action of static and dynamic loads. Currently, there are specification documents and recommendations, regulating the procedure for strengthening load-bearing structures with external reinforcement systems under the action of static loads. The development of mathematical models and methods for assessing the dynamic strength of composite materials under the action of high-intensity loads of impact and explosion of civil defence shelters and special facilities is an urgent task. The presented work deals with the results of theoretical studies of deformation, destruction and open penetration of single-layer and combined multilayer barriers at high-speed impact of ball-shaped strikers. The authors have proposed a mathematical model, describing within the framework of flow mechanics the processes of deformation and destruction of composite structures of concrete slabs, reinforced by an external reinforcement system under shock-wave loading conditions. In the range of meeting speeds of 1000–1500 m/s, the influence of the front and rear layers of reinforcement with carbon unidirectional fabric on the epoxide target from fine concrete on the process of penetration with a steel indenter at the approach angle of 90˚ has been investigated.KeywordsShock-wave loadingCarbon-fiber-reinforced plasticFine concreteDynamic destructionMathematic simulation