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Experimental investigation of the effect of damping coefficients on spring diameter thickness

Kadhim K. J.

Journal of Achievements in Materials and Manufacturing Engineering

2022

Vol. 115, nr 1

16--25

Purpose: The main objective of this research is to study the effect of damping coefficients on the damping strength of shock absorbers using Taguchi Design Experiment (DOE) and rough surface method in Design Expert 7.0.0. Design/methodology/approach: To achieve and measure the damping force based on the data analysis in the design program. The effecting parameters are: damping diameter (A), gas pressure nitrogen in damping (B), and suspension velocity(C). Consequently, the experiment was carried out in the lab to measure the damping force based on the data analysis. Findings: The experimental results demonstrated that nitrogen gas at a pressure of 40 bars is appropriate for dealing with motorcycles and that optimum parameter values may be achieved using ANOVA (Analysis of Variance), regression analysis, and confirmation studies. Research limitations/implications: The measure of the damping force in this process widely depend on the technical specifications of a testing machine. Consequently, machine operating parameters consider the main limiting factor in this process. Practical implications: In this current work, a steel spring of (50) mm diameter has been used in this experimental investigation to measure the influence of the damping force based on the data analysis. In addition, optimal working parameter values that maximize the performance were identified. The experimental test was planned and conducted according to the ANOVA (Analysis of Variance). Originality/value: The validation of experimental results shows that this analysis gives an average error 5%, it’s also concluded that the gas at a pressure of 40 bars is appropriate for dealing with motorcycles and can be adopted safely.