Mesfin Gizaw (PhD)Iliyas Ketsela2024-08-272024-08-272024-06https://etd.aau.edu.et/handle/123456789/3402Friaction materials are used to make brake pads, and these materials are forced up against the braking rotor, to slow down or stop a vehicle. Now days Metallic and semi-metallic compounds have replaced asbestos-based in commercial brake pads. Consequently, problems such as; excessive wear rates, noises, and vibration persist. Therefore, this research is required to improve the current performance of the brake pads in terms of wear rate, and coefficient of friction (COF). Naturally extracted fibers and fillers (flax fibers and eggshells) are required as a component for structural strength and polyester resin as a binding material in brake pad applications to overcome such problems. As a result, Hybrid nanomaterial constituents like (MWCNTs) and additional friction modifier (Al2O3) composites can replace asbestos-based ones which can cause lung cancer. Also, to guarantee long-term performance and to reduce environmental pollution, a higher level of care must be taken in the selection of good friction materials, to convert these materials a literature review is conducted on natural fibers and friction modifiers to obstacle this problem Also, the effects of particle size and volume fraction distributions are discussed the methodology section has the design of experiments, material preparation, and testing procedures for formulated materials. Nine samples were created for the comparison of (flax fiber, eggshell, MWCNTs, and Al2O3) reinforced with polyester resin composite in detail with variable fractions using the compression molding technique. The physical, mechanical, and thermal properties of the samples are evaluated and analyzed using the FEM analysis technique. Finally, The well-dispersed Flax fiber, eggshell, alumina particles, and polyester resin of sample SE with a 6wt.%, 21wt.%, 3wt.%, 8wt.%, and 62wt.% respectively created a larger contact surface. Consequently, the composite's surface hardness rose, reducing the specific wear rate of the brake linings and raising the coefficient of friction, also with improved absorption capabilities.en-USFlax FiberMWCNTsAlumina (Al2O3)Polyester ResinBrake PadsThesis