TR-NEWS used to detection of damage growth in complex structures

0397150 - ÚT 2014 CH eng A - Abstract
Převorovský, Zdeněk - Krofta, Josef - Chlada, Milan - Kober, Jan - Farová, Zuzana
TR-NEWS used to detection of damage growth in complex structures.
Nonlinear Elasticity in Materials. Curych: ETH Curych, 2013 - (Johnson, P.; Carmeliet, J.; Derome, D.). s. 66-67
[International Conference on Nonlinear Elasticity in Materials /18./. 09.06.2013-14.06.2013, Ticino]
R&D Projects: GA MPO(CZ) FR-TI1/198; GA MPO(CZ) FR-TI1/274; GA MPO FR-TI3/755
Institutional support: RVO:61388998
Keywords : NDT nondestructive testing * Nonlinear Elastic Wave Spectroscopy * Time Reversal Mirrors * acoustic emission
Subject RIV: JS - Reliability ; Quality Management, Testing

Nonlinear Elastic Wave Spectroscopy procedure (NEWS), combined with acoustic emission (AE) monitoring, was successfully employed as a part of SHM system during the cyclic fatigue tests of two riveted aluminium aircraft parts (wing flange and joint of flanges) and also during the quasi-static loading demolition of the steel lattice truss warehouse roof. While AE sources were localized in the course of loading periods, NLTRM was applied in test breaks. In all aircraft and building parts, the 3rd order nonlinearity parameter growths corresponded well to the growing activity of localized AE sources, however, no visible cracks were detected A complementarity of AE and NEWS can be further upgraded by a newly developed procedure of precise AE source location using TR signal processing.
Permanent Link: http://hdl.handle.net/11104/0229593