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This paper presents the design and optimisation of compliant nonlinear torsional springs by parametric finite element analysis. The springs are created based on a single B-spline curve, which exhibits a compact, lightweight, and simpler design than existing works. The spring is created by a combination of computational finite element analysis methods and optimisation algorithms that analyse and optimise spring designs. The models and methodology of spring creation are presented with results. The constant-torque spring was able to outperform the generic constant spring design in some aspects as...

Torsional springs are often created by a single fundamental spring design despite the application differences. The limitation of the spring output is constrained by the low number of fundamental designs of the torsional spring in some aspects, such as manufacturing complexity and limited application. This also leads to limited in the design development of torsional spring. A new torsional spring design is introduced in this paper. B-spline-based torsional springs can provide lower manufacturing complexity compared to generic torsional spring designs. This paper introduces a methodology to crea...

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