Vol.26, No.1, 2026, pp. 61–64
https://doi.org/10.69644/ivk-2026-01-0061 

This study investigates the impact of non-uniform density on the mechanical performance of rotating discs made from polyvinyl chloride (PVC), polystyrene (PS), and natural rubber (NR). Traditional analyses often assume uniform density which can lead to inaccurate predictions in real-world applications. By employing a variable density model, this research examines how density variations affect stress and strain distributions during rotation. Key findings reveal that polystyrene discs exhibit the highest radial stress, while natural rubber demonstrates superior performance under radial loading. The results underscore the importance of considering non-uniform density in the design and optimisation of polymer-based rotating systems, ultimately aiming to enhance their reliability and efficiency in various engineering applications.

Keywords: • density • disc • yielding • angular speed • rubber