EFFECT OF TEMPERATURE ON THE WEAR RESISTANCE TI6AL4V-CFRP/GFRP CONTACT UNDER VIBRATION CONDITIONS
DOI:
https://doi.org/10.18372/0370-2197.1(110).20915Keywords:
temperature, impact, titanium alloys, vibration, composite materials, wear, structure, fiberglass, carbon fiberAbstract
A study of the influence of temperatures from minus 50 to plus 50 ºС on the contact of TI6AL4V-СFRP/GFRP materials under the influence of the vibration factor is presented. It was determined that at temperatures of minus 50 ºС the wear resistance of composite materials increased by 20-25%. When the temperature decreases, the epoxy resins that make up the matrix change their mechanical characteristics towards increasing hardness, mechanical strength, creep, etc. It was found that GFRP with glass fibers showed less results in increasing wear resistance at negative temperatures, since glass fibers are more sensitive to low temperatures than carbon fibers in CFRP. Increasing the brittleness of glass reinforcing fibers allowed to increase wear resistance by 20% overall. While materials with carbon fibers demonstrate an increase in wear resistance by 25%.
It was found that the wear resistance of the Ti6Al4V alloy during testing almost does not change. A slight increase in wear up to 3-5% on the one hand may indicate an error in the research during measurement, and on the other hand, the influence of the environment on the friction process.
The studies established the stability of the contact and the balance of wear of the power elements of the structures in the TI6AL4V-CFRP/GFRP contacts under vibration action and changes in the temperature conditions of the tests from minus 50 to 50 ºС. An increase in wear resistance up to 25% of materials based on epoxy resins and carbon and glass fibers is noted due to changes in the physical and mechanical properties of the matrix at negative temperatures up to minus 50 ºС.
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