PSI - Issue 17

Ekaterina M. Zubova et al. / Procedia Structural Integrity 17 (2019) 822–827 Ekaterina M. Zubova et al./ Structural Integrity Procedia 00 (2019) 000 – 000

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6

0.025 ε yy , mm/mm

F1=0,1 кН F2=5,4 кН F3=8,7 кН F4=16,5 кН F5=11,2 кН F6=13,8 кН P 1 =0,1 kN P 2 =5,4 kN P 3 =8,7 kN P 4 =16,5 kN P 5 = ,1 kN P 6 =13,8 kN

0.020

0.015

0.010

0.005

0.000

200 y, mm

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100

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-0.005

Fig. 8. Distribution of longitudinal strain

Conclusions

Thus, analyzing the AE signals obtained as a result of uniaxial tension tests of C/C composite material with a ceramic coating, we can do the following conclusions: • AE signals are recorded with the following parameters during the failure of the coating: amplitude range 60 – 80 dB, frequency range 150 – 200 kHz; • damage accumulation process of the ceramic coating occurs throughout the test; • failure of the coating occurs directly in the zone of failure of the C/C sample. Acknowledgements Acknowledgement. The reported study was funded by RFBR according to the research project № 18 -31-00452, № 19 -41-590005. References Lee, K.-H., Park, J.-H., Ye, K.-H., 2006. Acoustic Emission Source Analysis of Vacuum Plasma Sprayed CoNiCrAlY Coatings. Journal of the Korean Physical Society 48, 1691-1695. Park, J.H., Kimb, J.S.,Lee, K.H., 2007. Acoustic emission characteristics for diagnosis of TBC damaged by high-temperature thermal fatigue. Journal of Materials Processing Technology 197-198, 537-541. Yang, L., Zhou, Y.C., Mao, W.G., Liu, Q.X., 2007. Acoustic emission evaluation of the fracture behaviour of APS-TBCs subjecting to bondcoating oxidation. Surface and Interface Analysis 39, 761-769. Yang, L., Zhong, Z.C., Zhou, Y.C., Lu, C.S., 2014. Quantitative assessment of the surface crack density in thermal barrier coatings. Acta Mechanica Sinica 30, 167-174. Wildemann, V. E., Spaskova, E. M., Shilova, A.I.,2016. Research of the damage and failure processes of composite materials based on acoustic emission monitoring and method of digital image correlation. Solid State Phenomena 243, 163-170. DOI:10.4028/www.scientific.net/SSP.243.163. Shilova, A.I., Lobanov, D.S., Wildemann, V.E., Lyamin, Y.B., 2014. Experimental study of the effect of fabric high temperature treatment on the composite strength properties. PNRPU Mechanics Bulletin 4., 221-239. DOI: 10.15593/perm.mech/2014.4.09. Tretyakova, T.V., Dushko, A.N., Strungar, E.M., Zubova, E.M., Lobanov, D.S.,2019. Comprehensive analysis of mechanical behavior and fracture processes of specimens of three-dimensional reinforced carbon fiber in tensile tests. PNRPU Mechanics Bulletin 1, 173-183. DOI: 10.15593/perm.mech/2019.1.15 Sutton, M.A., Orteu, J.-J., Schreier, H., 2009. Image Correlation for Shape, Motion and Deformation Measurements. University of South Carolina, Columbia, pp. 364. Zubova, Е.М., L obanov, D.S., Strungar, Е.М., Wildemann , V.E., Lyamin, Y.B., 2019. Application of the acoustic emission technique to the study of the damage accumulation in a functional ceramic coating. PNRPU Mechanics Bulletin 1, 38-48. DOI: 10.15593/perm.mech/2019.1.04 AMSY-6 Handbook. Developed and manufactured by Vallen Systeme GmbH, 2012 Grosse, C.U., Ohtsu, M.. 2008. Acoustic Emission Testing. Springer-Verlag Berlin Heidelberg, pp. 402.