stability, sample, critical load, experiment, deformation, torsion.

Experiments have studied the effect of free-flowing aggregate on torsional stability of thin-walled cylindrical shells. For research samples were made of aluminum alloy 3004 deep hood in the matrix. The samples were fixed cantilever to a rigid wall, on torque was applied to the free end. Tested empty and samples filled with iron powder. The loading of the samples was carried out stepwise, in portions of 10N at the beginning and when approaching the moment of loss stability of 1H, 0.5H. At each loading stage, torque and angle of rotation of the free end of the sample. Graphs built the dependence of the angle of rotation on the torque. Stability of samples lost in elasticity. At the beginning of loading, on filled with bulk filler in samples, no rotation of sections occurs due to obstacle forces friction of the aggregate. Iron powder increases the critical value of torque by 20-30 %.

Mikhail Vasilyevich Petrov,

Doctor of Engineering, Professor, Chuvash state University named after I. N. Ulyanov, Cheboksary, Russia.

Boris Vasilyevich Mikhailov,

Candidate of technical Sciences, Associate Professor, Chuvash state University named after I. N. Ulyanov, Cheboksary, Russia

Ekaterina Grigoryevna Gonik,

Senior Lecturer, Chuvash state University named after I. N.

Ulyanov, Cheboksary, Russia.