Análisis tribológico comparativo de pastillas de freno con fibras de vidrio y cabuya como materiales reemplazantes al amianto.

Abstract

The objective of this experimental work is to carry out the comparative tribological and mechanical analysis of brake pads with glass fibers and cabuya as substitute materials for asbestos, for which mechanical and tribological tests were chosen to validate the results, and be able to determine the feasibility of the correct usage of the forementioned materials in the national market. The tribological tests chosen were that of wear by means of dry sand according to ASTM G-65 standard, Pin on Disk test, based on the ASTM G-99 standard, while the mechanical tests were Charpy impact or pendulum tests under the standard ASTM E-23 and the Brinell ASTM E-10 hardness test. It was started by the developing five test tube for each test and type of material, all sized according to the corresponding standard. The tribological and mechanical tests were carried out following the procedure and the conditions of load, temperature, time and speed established in each standard. The results obtained were organized in tables that helped the realization of a comparative statistical model T-Student, which shows whether or not there is variation of the mechanical properties of the asbestos fiber test tube specimens, with those of fiberglass and cabuya also, comparative graphs were made between the values of wear rate, coefficient of friction, hardness, in order to determine its cost-benefit ratio. From the results obtained, it is concluded that the brake tests tube made with fiberglass and cabuya do not have the mechanical characteristics that resemble those of asbestos, so it would not be a good substituent that is inside the brake pads, it is recommended to perform tests with other types of materials to try to find a substitute for asbestos that has better mechanical and tribological characteristics if possible.