METHOD FOR DETERMINING THE RESIDUAL STRENGTH OF A THIN-WALLED STRUCTURE Russian patent published in 2022 - IPC G01M5/00 

FIELD: structural tests.

SUBSTANCE: invention relates to the technique of strength testing of full-scale structures, in particular to a method for a known type of tests for the residual strength of a full-size thin-walled structure. In the process of implementing the proposed method, incisions of reliably detectable sizes are made on the tested structure before it is loaded, in structural elements critical for fatigue conditions. Multifilament crack detectors are mounted on the path of incision development. The structure is loaded stepwise until a signal appears from one of the crack detectors. According to this signal, the structure is automatically unloaded and the position of the vertex of the formed crack is determined by a non-destructive testing method and the crack length is measured. If there is a stable growth of the crack, then the step loading is repeated. Loading is repeated until the crack grows, which, with subsequent loading, can lead to its unstable growth. In this case, the tests are suspended without bringing the structure to its complete destruction. The resulting total size of the incision and crack is taken as a critical size, and the achieved load value is taken as a critical load. Repair of the structure is carried out in the area of the developed crack, and the tests are continued according to the procedure described above until the other incisions grow to critical sizes.

EFFECT: preventing the complete destruction of the structure, as a result of which the costs of performing expensive restorative repairs are reduced, or in case of the impossibility of repair for the manufacture of additional full-size structures, and also leads to a reduction in costs and duration of testing.

1 cl, 4 dwg