Experimental investigations of contact-type damage nonlinearity

• Published in: Journal of physics. Conference series Vol. 842; no. 1; pp. 12054 - 12062
• Main Authors: Klepka, A., Dziedziech, K., Pieczonka, Ł., Adamczyk, M., Staszewski, W.J.
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.05.2017
• Subjects: Algorithms; Contact; Damage detection; Nonlinear phenomena; Nonlinearity; Numerical models; Physics; Scientific papers
• ISSN: 1742-6588; 1742-6596
• DOI: 10.1088/1742-6596/842/1/012054

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.