Experimental investigations of contact-type damage nonlinearity

12th International Conference on Damage Assessment of Structures

Klepka, A.^1 ; Dziedziech, K.^1 ; Pieczonka, L.^1 ; Adamczyk, M.^1 ; Staszewski, W.J.^1

Department of Robotics and Mechatronics, AGH University of Science and Technology, Al. A. Mickiewicza 30, Krakow

30-059, Poland^1

关键词: Contact-type damages;    Experimental investigations;    Experimental verification;    Mathematical descriptions;    Non-linear acoustics;    Non-linear phenomena;    Prediction algorithms;    Temperature changes;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/842/1/012054/pdf
DOI  :  10.1088/1742-6596/842/1/012054

来源: IOP

【 摘 要 】

The problem of identification of non-linear phenomena associated with contact-type non-linearity is the subject of many research papers. The number of theoretical models describing the non-linear phenomena is constantly increasing. New capabilities of experimental verification and observation of these non-linear effects provide opportunities for a more accurate mathematical description of the non-linear behavior of contact interfaces. Better understanding of the non-linear related contact mechanisms can lead to more accurate numerical models of structures with contact-types defects, damage propagation and prediction algorithms and development of new methods for damage detection. This paper presents research on the non-linear acoustic phenomena in the presence of contact-type damage. Two test samples in contact are subject to vibro-acoustic modulation test. Non-linear spectral components were analysed and compared to the temperature changes generated as a results of the frictional forces.