TESTING METHOD OF COWL CERAMIC SHELLS Russian patent published in 2017 - IPC G01N3/12 

FIELD: testing equipment.

SUBSTANCE: static load application is carried out by the camera of an elastic material, placed inside the test membrane to the most intense shell zone defined by predetermined loading conditions, and calculating the volume of material stress calculation methods of this zone. The strained volume of the shell material during ground tests as part of the fairing using the general theory of equations rotation shells or approximate numerical methods is calculated in accordance with the set ground test modes of ceramic membranes in the cowls. Given the calculated voltage value, volumes of tensile stress equivalent to tensile stresses in the stressed volume of the shell material during loading radome operational load is determined, and it is determined by the maximum permissible pressure for a given probability of non-destruction ceramic shell.

EFFECT: increase of reliability of compliance test results for assessing the strength of the ceramic shells when loading the internal pressure in intermediate operations of manufacturing radomes results ground testing of ceramic membranes composed fairings through the use of sound calculation method for establishing the level of applied pressure, taking into account the conditions of loading fairings operational loads and efficiency of test results and improve the accuracy assessment of their bearing capacity.