Aerospace Instrument-Making Annotation << Back METHODS FOR TESTS OF CASINGS СONTAINMENT WITH MODELING OF BLADES RELEASING A.R. Lepeshkin, O.I. Ilinskaja, V.A. Golikov, V.V. Nazarov The normative technical documents contain the requirement of mandatory localization in the aircraft gas turbine engine (GTE) casings of fragments arising from the destruction of GTE blades. However, the normative technical documents do not contain recommendations on the technology of blade releasing, which ensures that these requirements are met and the blade releasing methods have some disadvantages. One of the methods used to blade releasing is the method of the blade releasing with an explosion. This method of the blade releasing is very complicated and has a number of serious drawbacks: an additional force from the explosion is applied to the blade, and as a result the fl ight path of the blade changes. An original and effective method of additional loading of blade section is proposed in which the blade of the GTE fan blade is releasing. The blade releasing method consists in the redistribution of stresses in a given section of the blade under additional thermal loading and in providing a quasi-brittle failure of the blade at the specifi ed cross section at a given rotor speed. The calculated simulation of the controlled releasing of the blade is carried out. When using the developed method the blade is reliably releasing in the required cross-section at a specifi ed speed without using an explosion. The results of successfully carried out tests of fan casing сontainment of the aircraft engine on the spin rig are obtained, which showed the effectiveness of the developed method of thermally controlled blade releasing. Key words: methods, tests, casing, сontainment, releasing, blade, spin rig, frequency speed. Contacts: - Pp. 40-47.