Reinforced Concrete Matrices Under Impulse Loads

Reinforced concrete matrices are used in the method of hydro explosion stamping for the manufacture of sheet metal products. Reinforced concrete matrices have a number of advantages that ensure the effectiveness of their use. However, there is a problem – low durability under repeated explosive loads. The analysis of scientific publications makes it possible to set the goal and objectives of the research. Thus, the paper analyses ways of improving the constructive of reinforced concrete ring-shaped matrices for hydro explosion stamping and methods of calculating matrices. The author describes the developed design of the matrix, to which he additionally install a compensation layer and a hydraulic chamber. The paper further describes the developed method of calculating ring-shaped reinforced concrete matrices. The author's proposed method for calculating strength and deformation is based on the method of finite integral transformations. A theoretical calculation was performed using various mathematical models. Experimental researches of a series of matrices samples under explosive loads have been carried out. Comparison of theoretical and experimental results is made. Moreover, both our own research and other authors. As a result, a calculation method was obtained that allows one to determine the values of stresses and deformations in the matrix under the action of impulse loads at any time and in any part of the matrix.