NUMERICAL ANALYSIS OF NON-NEWTONIAN FLUID BEHAVIOR IN SHOCK ABSORBERS USING THE KELVIN-VOIGT MODEL Erwin, Tulus, Elvina Herawati, Imam Solekhuddin
Universitas Sumatera Utara, Universitas Sumatera Utara, Universitas Sumatera Utara, Universitas Gadjah Mada
Abstract
Shock absorbers are a crucial component in automotive suspension systems, significantly influencing vehicle performance, comfort, and safety. The selection of fluid within shock absorbers plays a pivotal role, and non-Newtonian fluids, which exhibit complex viscosity characteristics, offer potential advantages in shock absorption due to their unique behavior under varying conditions. However, optimizing their use requires detailed studies. This research aims to understand non-Newtonian fluid dynamics in shock absorbers by formulating differential equations that govern their flow, utilizing the Kelvin-Voigt viscoelastic model to accurately describe the material properties. Numerical methods, particularly the finite element method (FEM), are employed to solve these equations under various operating conditions. The simulations are conducted using the COMSOL Multiphysics software to uncover the complex interactions between the viscous and elastic properties of non-Newtonian fluids. These interactions demonstrate significant deviations from the behavior predicted by traditional Newtonian fluid models. The Kelvin-Voigt model effectively represents the behavior of materials that exhibit both elastic deformation and viscous flow, providing a comprehensive framework for analyzing the dynamic response of shock absorbers. The results of this study emphasize the critical importance of considering non-Newtonian characteristics in the design and optimization of shock absorbers. By providing a deeper understanding of the fluid dynamics involved, this research contributes to the development of more efficient and effective shock absorbers, enhancing overall vehicle performance and passenger comfort.
