Static and Dynamic Optimisation of Fluid-Filled Lattices for Responsive Orthotic Insoles
This thesis presents a study on the static and dynamic performance of fluid-filled lattice structures for use in responsive orthotic insoles. The central aim is to explore fluid-filled lattices as a means of enhancing comfort and reducing peak plantar pressures under both static and dynamic loading conditions. The structural response of gyroid lattices are examined with experimental and numerical analyses with particular focus on the influence of geometric parameters on compressive behaviour. The behaviour of fluid flow within the lattice and the influence of different geometric parameters is also characterised to evaluate permeability and pressure redistribution. Building on this, a solid-liquid composite model is developed, integrating experimental observations with numerical simulations to capture the behaviour of fluid-filled gyroid lattices for the development of a homogenised constitutive material model. A gait-driven numerical framework is proposed to simulate realistic insole loading scenarios, verified against experimental plantar pressure measurements. This model is used in an optimisation algorithm designed to generate customised responsive insole properties, enabling the integration of fluid-filled lattices into practical orthotic applications. The findings demonstrate that fluid-filled lattice insoles can significantly reduce peak plantar pressures during gait, thereby improving user comfort. The optimised design offers a promising pathway towards more effective orthotic interventions and contributes to the advancement of responsive insole technologies.
Networked Digital Library of Theses and Dissertations