tank truck, stability, shell, limit state, stress, force, moment, elasticity, density.

In the paper, a state in which the voltage at the point of buckling reaches a critical value is taken as the limit state. The stability of the shells is lost in the elastic stage of the material, therefore, the principle of superposition is used to calculate the critical stress. The critical stress for the empty shell is calculated using the formula for calculating the critical stress proposed in [1, 11]. The shell filled with bulk aggregate is under the influence of a combined load: a weight load that is uniformly distributed along the length and pressure on the inner surface of the shell. The stress from the weight load is calculated as the ratio of the bending moment to the axial moment of resistance; the axial stress from the internal hydrostatic pressure of the loose aggregate is determined by the momentless theory of shells. Circumferential stress is neglected due to its small effect on stability. The total voltage determines the value of the critical voltage at which stability is lost. Verification is performed by comparing the calculated critical voltage with experimental results and numerical calculations. Recommended calculated dependencies to determine the required geometric dimensions of the designed tank trucks for transportation of bulk materials. The calculation method does not take into account the effect of imperfections on stability; therefore, the influence of imperfections is proposed to be taken into account by an increased factor of stability.

Gonik Ekaterina Grigoryevna

e-mail: katya.gonik@mail.ru, Senior lecturer, I. N. Ulyanov Chuvash State University, Cheboksary, Russia.

Petrov Mikhail Vasilyevich

e-mail: rimmapetrova20@gmail.com, Doctor of technical Sciences, Professor, I. N. Ulyanov Chuvash State University, Cheboksary, Russia.