Epoxy and Polyester Composites' Characteristics under Tribological Loading Conditions
Jasem Ghanem Alotaibi1, Ayedh Eid Alajmi1, Gabrel A Mehoub2
1Department of Automotive and Marine Engineering Technology, Public Authority for Applied Education and Training, Adailiyah 42325, Kuwait.
Polymers
|July 24, 2021
Summary
This study investigated glass fibre-reinforced composites
Area of Science:
- Materials Science
- Tribology
- Polymer Composites
Background:
- Glass fibre-reinforced composites (GFRE and GFRP) are widely used in various engineering applications.
- Understanding their tribological properties, including friction and wear, is crucial for performance and durability.
- Fibre orientation significantly influences the mechanical and surface interaction behaviors of composites.
Purpose of the Study:
- To evaluate the friction and dry wear characteristics of glass fibre-reinforced epoxy (GFRE) and glass fibre-reinforced polyester (GFRP) composites.
- To investigate the effect of three distinct fibre orientations (parallel, anti-parallel, and normal) on wear rates and friction coefficients.
- To analyze the influence of sliding distance on the wear behavior of these composite materials.
Main Methods:
- Experiments were conducted using a block-on-ring configuration at room temperature.
- Applied load was 30 N, and sliding velocity was 2.8 m/s.
- Frictional forces, interface temperatures, and worn surfaces (analyzed via SEM) were recorded and examined.
Main Results:
- Glass fibre-reinforced epoxy (GFRE) composites with anti-parallel (AP-O) fibres exhibited the highest wear rates.
- Glass fibre-reinforced polyester (GFRP) composites with parallel (P-O) fibres showed the highest wear rates.
- Composites with P-O and normal orientation (N-O) fibres demonstrated the lowest wear rates at extended sliding distances.
- The lowest friction coefficient (0.25) was recorded for composites with AP-O fibres.
- GFRP composites with P-O fibres had higher wear rates than those with N-O fibres at maximum speed.
Conclusions:
- Fibre orientation is a critical factor governing the friction and wear performance of GFRE and GFRP composites.
- Anti-parallel fibre orientation in GFRE and parallel fibre orientation in GFRP lead to increased wear rates.
- Parallel and normal fibre orientations offer better wear resistance at longer sliding distances.
- Specific fibre orientations can be selected to optimize friction and wear behavior for different applications.
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