METHOD OF ESTIMATION AND PREDICTION OF TEMEPARTURE STRESSES IN PARTS OF ORGANIC GLAZING IN FLIGHT TESTS OF HIGH SPEED AIRCRAFT Russian patent published in 2008 - IPC G01M17/00 

FIELD: physics.

SUBSTANCE: invention is related to the field of aviation industry and may be used in flight tests for determination of operational stresses (σ_o) in organic glazing of high speed aircrafts under conditions of flight with air temperature by height, number M_max, flight duration with M_max, which differ from flight conditions during flight tests, for estimation of glazing stressed condition at the stage of design and during formation of resource tests cycles. During first flights temperature is measured on glazing surfaces of aircraft in flight for specification of condition of heat exchange on the surface of glazing parts. Temperature change is determined along parts thickness and in flight time under any preset conditions, including maximum modes of flight. Mathematical model of thermally stressed condition is formed for i-layers of glazing, and resulting temperature values of stresses that represent sum of thermoelastic stresses at higher temperatures are determined with application of elastoplastic characteristics of glazing by obtained distribution of temperature, as well as relaxing stresses in the process of flight, residual temperature stresses accumulated in previous flights, with consideration of their relaxation during stand between flights, in i-layer, in k-moment of N-flight.

EFFECT: increase of accuracy of resulting stresses determination in glazing.

3 cl, 2 dwg