Meta-material based on an Ideal Spring Lattice

Meta-material based on an Ideal Spring Lattice: A Linear Elastic Isotropic Material with Zero Poisson's Ratio over Large Strains

Delissen, A.A.T.M.

Herder, J.L. (mentor)

Mechanical, Maritime and Materials Engineering

Precision and Microsystems Engineering

2016-07-11

A lot of scientific effort is put into changing mechanical material properties by creating micro-structural architectures instead of chemical composition. This results in meta-materials, which are future materials tuned to the needs of the user. To change the Poisson’s ratio and Young’s modulus, most current designs exploit mechanisms and hinges to obtain the desired behavior. However, this leads to non-linear material properties and anisotropy, especially for large strains. In this work a method is proposed that makes use of specially curved leaf springs (ideal springs) in a planar lattice. The spring characteristics directly determine the Young’s modulus, furthermore is the Poisson’s ratio designed to be zero. These properties are isotropic and linear up to large compressive and tensile strains. The spring designs may not only be used in a lattice, but also could be used as ideal springs or zero free length springs in the field of static balancing.

http://resolver.tudelft.nl/uuid:40bbb709-bf38-488a-8fee-ea226a21838c

Student theses

master thesis

(c) 2016 Delissen, A.A.T.M.