Print Email Facebook Twitter Towards a neutrally stable compressible metamaterial Title Towards a neutrally stable compressible metamaterial Author Zhu, Jeffrey (TU Delft Mechanical, Maritime and Materials Engineering) Contributor Radaelli, G. (mentor) Herder, J.L. (graduation committee) Degree granting institution Delft University of Technology Programme Mechanical Engineering | Mechatronic System Design (MSD) Date 2024-03-08 Abstract Neutrally stable metamaterials can maintain differ- ent shapes without any energy input, making it a key innovation in the quest for more energy-efficient technologies. Despite this intriguing property, the research in this area is scarce. This study proposes a method for achieving neutral stability in metama- terials. This method is validated with a novel unit cell design that utilizing two identical beam elements that are mirrored. Each element displays a constant force characteristic. By pre- tensioning these elements, we align their constant force regions, thereby inducing a state of neutral stability. Through finite element method (FEM) simulations and geometrical optimisation, the beam of this design is optimised to achieve the optimal constant force response. A prototype is made and a test setup is constructed to validate the accuracy of the simulations and the feasibility of the method for achieving neutral stability. Results indicate that while perfect neutral stability was not fully achieved, this method can be applied on other constant force mechanisms to create neutrally stable metamaterials. Subject Metamaterialconstant forceneutral stability To reference this document use: http://resolver.tudelft.nl/uuid:a93d4da4-ce95-4932-9293-4adcc95a2966 Part of collection Student theses Document type master thesis Rights © 2024 Jeffrey Zhu Files PDF Jeffrey_Zhu_Thesis.pdf 23.07 MB Close viewer /islandora/object/uuid:a93d4da4-ce95-4932-9293-4adcc95a2966/datastream/OBJ/view