STABILITY OF PLATES AND SHELLS ON IMPACT

Abstract

Abstract - The scope of tasks did not include the case of a very fast shock load application, since its study should be carried out taking into account the wave nature of the propagation of stresses in the shell or plate. Let us now turn to the case of shock loading of plates and shells. It should be noted that the theory of shock resistance of shells and plates can be used in the calculations of thin-walled structures for the effect of explosive and seismic loads. Reality often poses the task of calculating thin-walled structural elements taking into account special physical conditions, for example, radiation heating, radiation exposure, heat stroke, etc. All this puts forward the need for a special calculation of shells and plates. Some issues of this kind are covered in the provided article, namely: the formulation of the problem of determining the bearing capacity of shells and plates; the problem of calculating the strength of shells subjected to radiation heating or exposed to radiation, heat stroke and the theory of thermal boundary layer. The bearing capacity of the shell and plates is the limiting value of the external forces at which the internal forces T and moments M satisfy the final ratio, the equilibrium equations, the conditions of compatibility of deformations and boundary conditions. In some special cases, due to the finite relation, the equilibrium problem becomes statically definable and does not require conditions for the compatibility of deformations. Then the question of the bearing capacity of the shell and plates is solved relatively simply. It is even more simplified if forces and moments can be expressed in terms of external forces only using equilibrium equations, which is the case, for example, in the momentless theory of shells and plates in this case, the final ratio [3] determines the bearing capacity in which this article is considered