Computational methods to study mechanical instabilities in soft and multi-physics media
Abstract/Contents
- Abstract
- Predictive modeling of complex materials is gaining more and more attention each day as the complexity of problems increases rapidly with innovations in fabrication and monitoring technologies. At the same time, these innovations are revealing unsolved fundamental problems both in nature and engineered systems, mainly because of high nonlinearities in material and geometry, multiple physics, and multiple length and time scale behavior. In this thesis, we focus on developing computational tools to model soft and multiphysics materials as well as to capture geometrical and material instabilities observed in these complex materials. We show that the developed computational schemes successfully pinpoint the onset and simulate the evolution of instabilities in soft materials under large deformations, extending the fundamental understanding of the complex bifurcation response of bilayer materials and commonly observed instability modes of buckling, wrinkling, period-doubling, and creasing. Through fundamental studies on the transient nature of poroelastic instabilities, we address the influence of solvent diffusion on instabilities for stimuli-responsive materials such as hydrogels. Particularly, we discuss the numerical modeling aspects of hydrogels along with dissipative fluid transport phenomena through developing new numerically stable mixed isogeometric hydrogel models. We also introduce a new structural stability criteria for hydrogels with a saddle-point formulation, enabling computational studies designed to elucidate the diffusion-driven swelling-induced instabilities of hydrogels. Equipped with the developed accurate and efficient methods, we draw stability diagrams highly relevant to designing functional and tunable soft hydrogel devices over a wide range of length scales.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2019; ©2019 |
| Publication date | 2019; 2019 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Dortdivanlioglu, Berkin |
|---|---|
| Degree supervisor | Linder, Christian, 1949- |
| Thesis advisor | Linder, Christian, 1949- |
| Thesis advisor | Borja, Ronaldo Israel |
| Thesis advisor | Kuhl, Ellen, 1971- |
| Degree committee member | Borja, Ronaldo Israel |
| Degree committee member | Kuhl, Ellen, 1971- |
| Associated with | Stanford University, Civil & Environmental Engineering Department. |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Berkin Dortdivanlioglu. |
|---|---|
| Note | Submitted to the Civil & Environmental Engineering Department. |
| Thesis | Thesis Ph.D. Stanford University 2019. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2019 by Berkin Dortdivanlioglu
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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