NUMERICAL-THEORETICAL STUDY OF STRESS-STRAIN STATE OF ROTATIONAL COMPOSITE SHELLS AT DYNAMIC LOADING WITH REGARD TO LARGE DEFORMATIONS

A model for calculating the dynamics of axisymmetric shells of oriente d fiberglass in the area of large deformations has been developed. The calculated results are compared with the experimental data on explosi ve loading of cylindrical one-layer fiberglass and two-layer (steel+fi berglass) shells. The loading is performed by the explosion of a compa ct charge located in the geometrical center of the shell. The suggeste d numerical model, which considers the decrease in the elastic modulus of the binder, depending on the current elastic energy stored in the material, allows us to obtain a satisfactory description of the shell behavior at different levels of loading.