PSI - Issue 17

Dmitrii S. Lobanov et al. / Procedia Structural Integrity 17 (2019) 651–657 Lobanov Dmitrii S., Staroverov Oleg A./ Structural Integrity Procedia 00 (2019) 000 – 000

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of the specimens. This part of The work was performed as part of the fulfillment of the state task of the Ministry of Education and Science of Russia No. 9.7526.2017/9.10

Conclusion

Methodological issues related to the combined effect of mechanical loads and increased temperatures have been worked out. A series of experimental studies have been conducted to study the influence of increased temperatures on fatigue life, relative stiffness and residual strength of structural fiberglass specimens. It has been outlined that when the temperature rises to 120°С, the fatigue life of fiberglass decreases at the given loading parameters by 20-30%, at the tempera ture of 200°С by 60 -70%. The analysis of changes in the destruction mechanisms during fatigue life was made depending on the test temperature. The diagrams of fatigue sensitivity and stiffness changes for the fiberglass specimens were constructed and features of the residual strength alterations at increased temperatures were revealed. A study of the fracture surface patterns of the fiberglass flat specimens was made. It was noted that in the process of fatigue accumulation of damage, local heating and delamination intervals were formed on the surface of the specimens. The research was performed at the Perm National Research Polytechnical University at support of the Russian Scientific Fund (project No. 18-79-00209). References Babushkin, A.V., Lobanov, D.S., Kozlova, A.V., Morev, I.D., 2013. Research of the effectiveness of mechanical testing methods with analysis of features of destructions and temperature effects. Frattura ed Integrita Strutturale 24, 89 – 95. Chen, G., Zhang, W., Iizuka, T., 2019. The fatigue fracture characteristics of the bond zone of aluminum matrix composites (Al-12Si/ABOw) with Al-12Si alloys. Materials Science and Engineering A 755, 181 – 189. Colombo, C., Bhujangrao, T., Libonati, F., Vergani, L., 2019. Effect of delamination on the fatigue life of GFRP: A thermographic and numerical study. Composite Structures 218, 152 – 161. Dattoma, V., Giancane, S., 2013. Evaluation of energy of fatigue damage into GFRC through digital image correlation and thermography. Composites Part B: Engineering 47, 283 – 289. Fouchier, N., Nadot-Martin, C., Conrado, E., Bernasconi, A., Castagnet, S., 2019. Fatigue life assessment of a Short Fibre Reinforced Thermoplastic at high temperature using a Through Process Modelling in a viscoelastic framework. International Journal of Fatigue 124, 236 – 244. Habibi, M., Laperrière, L., Hassanabadi, H.M., 2019. Effect of moisture absorption and temperature on quasi-static and fatigue behavior of nonwoven flax epoxy composite. Composites Part B: Engineering 166, 31 – 40. Haggui M., El Mahi, A., Jendli, Z., Akrout, A., Haddar, M., 2018. Static and fatigue characterization of flax fiber reinforced thermoplastic composites by acoustic emission. Applied Acoustics. Kucher, N.K., Zarazovskii, M.N., Danil’ch uk, E.L., 2013. Deformation and strength of laminated carbon-fiber-reinforced plastics under a static thermomechanical loading. Mechanics of Composite Materials 6, 669 – 680. Lobanov, D.S., Babushkin, A.V., Luzenin, A.Yu., 2018. Effect of increased temperatures on the deformation and strength characteristics of a GFRP based on a fabric of volumetric weave. Mechanics of Composite Materials 5, 655 – 664. Lobanov, D.S., Slovikov, S.V., 2017. Mechanical properties of a unidirectional basalt-fiber-reinforced plastic under a loading simulating operation conditions. Mechanics of Composite Materials 6, 767 – 772. Lobanov, D. S., Vildeman, V. E., Babin, A. D., and Grinev, M. A., 2015. Experimental research into the effect of external actions and polluting environments on the serviceability of fiber-reinforced polymer composite materials. Mechanics of Composite Materials 1, 69 – 79. Lobanov, D.S., Wildemann, V.E., Spaskova, E.M., Chikhachev, A.I., 2015. Experimental investigation of the defects influence on the composites sandwich panels strength with use digital image correlation and infrared thermography methods. PNRPUMechanics Bulletin 4, 159 – 170. DOI: 10.15593/perm.mech/2015.4.10. Maleki, A., Saeedifar, M., Najafabadi, M. A., Zarouchas D., 2018. The fatigue failure study of repaired aluminum plates by composite patches using Acoustic Emission. Engineering Fracture Mechanics. Manteghi, S., Sarwar, A., Fawaz, Z., Zdero, R., Bougherara, H., 2019. Mechanical characterization of the static and fatigue compressive properties of a new glass/flax/epoxy composite material using digital image correlation, thermographic stress analysis, and conventional mechanical testing. Materials Science and Engineering C 99, 940 – 950. Maragoni, L., Carraro, P.A., Peron, M., Quaresimin, M., 2016. Fatigue behavior of glass/epoxy laminates in the presence of voids. International Journal of Fatigue 95, 18 – 28. Acknowledgements