indicator, critical force, exemplar, envelope, resistance strain gage, stability

Experiments on a research of loss of stability empty are executed and the fixed cylindrical envelopes filled with loose substance konsolno at a clear bend. For experience exemplars were chosen on similarity with bolshegabaritny tanker trucks for transportation of loose materials. One the end rigidly was fixed on the test stand, and on another, the free the end of an exemplar, was put a moment of deflection. It was increased till the moment, when there was a loss of stability of an exemplar which was followed cotton. By the received results of the pilot studies it is possible to conclude that loss of stability of an exemplar happens in a resilient stage. Rhomboidal dents on the middle of an exemplar in an oblate zone are formed by camber inside. Ultimate load does not depend on degree of fullness of exemplars. Value of ultimate load, for empty exemplars, coincides with results works [6].

Petrov Mikhail Vasilyevich, Doctor of Technical Sciences, Professor, I. N. Ulyanov Chuvash State University, Cheboksary, Russia.