Finite Element Modelling of Torsion Spring Buckling

Sammanfattning

This master’s thesis aims to develop a simulation method for analyzing the buckling of torsion springs using an implicit solver. The study focuses on creating a Finite Element (FE) model to capture buckling onset, post-buckling behavior, plasticity, and friction loss. Additionally, an analytical equation for initial buckling is derived to validate the simulation results. This study evaluated the use of beam elements to model torsion springs. The findings show that the beam element modeling approach provides reliable results, aligning well with both analytical equations and experimental data. The study concludes that developing an analytical equation incorporating changes in coil diameter and number of coils could further improve the accuracy of the results. Differences between simulation and test data are assumed to be a result of unmatching material properties. However, the results are considered successful within an acceptable range.