ORCID ID
0000-0003-3399-5449
Date Awarded
2019
Document Type
Dissertation
Degree Name
Doctor of Philosophy (Ph.D.)
Department
Applied Science
Advisor
Hannes C Schniepp
Committee Member
Mark K Hinders
Committee Member
Emilie J Siochi
Committee Member
Catharine C Fay
Abstract
Aerospace systems demand high performance materials that minimize weight while functioning under extreme environmental conditions. One way to meet these requirements is by incorporating hierarchical structures into part design. These structures are known to impart unique mechanical properties not characteristic of the bulk material such as high strength and toughness. It is difficult, however, to manufacture these structures due to the inherent trade-off between part size and feature resolution in traditional manufacturing processes. Additive manufacturing offers a potential solution to these issues by allowing material placement directly at desired locations. This loosens geometric constraints and allows for multiple contiguous materials in a single part. Despite these advantages, additive manufacturing still suffers from part size/feature resolution and repeatability issues. The goal of this work is to develop capabilities for additive manufacturing of hierarchical structures with features from the nano- to macroscale. First, we will study existing additive manufacturing techniques for aerospace grade parts and develop improved systems to mitigate repeatability issues. Then, we will use carbon nanotubes as an element for manufacturing multifunctional systems with material hierarchy. Finally, we will study biostructures as the basis of new additive manufacturing techniques for geometric hierarchy. This includes diatomite composite printing as well as growth and manipulation of live diatoms on macroscale parts.
DOI
http://dx.doi.org/10.21220/s2-b1n8-rd66
Rights
© The Author
Recommended Citation
Gardner, John Michael, "Additive Manufacturing of Nanomaterial Based Hierarchical Structures" (2019). Dissertations, Theses, and Masters Projects. William & Mary. Paper 1563899002.
http://dx.doi.org/10.21220/s2-b1n8-rd66