Date of Award

3-2023

Document Type

Thesis

Degree Name

Master of Science in Space Systems

Department

Department of Aeronautics and Astronautics

First Advisor

Carl M. Hartsfield, PhD

Abstract

This research characterizes the optimal gyroid infill design for the 1st frequency response of composite sandwich panels. Structural performance may be improved by designing the gyroid infill within the sandwich panel to have a 1st mode resonance frequency above typical launch vehicle vibrations. Ensuring a component generates a natural frequency response above a designed threshold is mandatory for space launch systems to prevent damage. The gyroid, a Triply Periodic Minimal Surface (TPMS), has the potential to provide close to isotropic stiffness in the principal axes with a minimal amount of material, making it an attractive choice for this application. This thesis uses a Design of Experiments (DOE) methodology to design and analyze multiple 3D printed structures using accelerometer measurements on a vibration table to identify the combination of sandwich panel thicknesses and gyroid shapes that will provide the necessary stiffness to attain a 1st mode frequency response greater than 70 Hz with minimal mass. The results are used to make recommendations into the design of gyroid structures for 3D printed satellite construction.

AFIT Designator

AFIT-ENY-MS-23-M-281

Comments

A 12-month embargo was observed.

Approved for public release. Case number on file.

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