Metamaterial Behaviour for Motion Systems Using an Approximated Ideal Shear Cell
L.H. Schattenberg (TU Delft - Mechanical Engineering)
Pierre Roberjot – Mentor (TU Delft - Mechatronic Systems Design)
Just Herder – Mentor (TU Delft - Precision and Microsystems Engineering)
J.F.L. Goosen – Graduation committee member (TU Delft - Computational Design and Mechanics)
M. Wiertlewski – Graduation committee member (TU Delft - Human-Robot Interaction)
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Abstract
Metamaterials are tessellated structures that introduce unique properties to motion system applications. The research on behaviour changes caused by this tessellation remains limited. This paper outlines the change in behaviour from a compliant unit cell to a metamaterial motion system, regarding linear stiffness, range of motion (RoM) and crosstalk. These properties are achieved through the analysis of series and parallel configurations, as well as scaling variations. The concept of an ideal shear cell is presented, describing desired motion system characteristics. Roberts mechanism approximates the ideal shear cell, bringing embodiment for finite element analysis and experimental validation. Results indicate that parallel configurations increase stiffness, while series arrangements reduce it, with RoM and crosstalk displaying opposing trends. Additionally, variations in flexure thickness introduce a trade-off between stiffness and range of motion. Different scaling strategies affect overall stiffness with minimal impact on RoM and crosstalk. While the main findings do not indicate inherent performance benefits to compliant mechanisms. This research contributes valuable insights into the design and performance of metamaterial-based motion systems, providing a foundational framework for future studies and applications.