- Title Information
- Title
- Elastic Foam Characterization for Rate-Dependent Nonlinear Material Model Development
- Name:
Personal
- Name Part
- Landauer, Alexander Kafka
- Role
- Role Term:
Text
- creator
- Name:
Personal
- Name Part
- Franck, Christian
- Role
- Role Term:
Text
- Advisor
- Name:
Personal
- Name Part
- Kim, Kyung-Suk
- Role
- Role Term:
Text
- Reader
- Name:
Personal
- Name Part
- Henann, David
- Role
- Role Term:
Text
- Reader
- Name:
Personal
- Name Part
- Wong, Ian
- Role
- Role Term:
Text
- Reader
- Name:
Corporate
- Name Part
- Brown University. Engineering: Mechanics of Solids
- Role
- Role Term:
Text
- sponsor
- Origin Information
- Copyright Date
- 2019
- Physical Description
- Extent
- xviii, 143 p.
- digitalOrigin
- born digital
- Note:
thesis
- Thesis (Ph. D.)--Brown University, 2019
- Genre (aat)
- theses
- Abstract
- Elastic polymer foams are ubiquitous in cushioning, impact protection, and similar applications. Consisting of solid elastic polymer matrix and gaseous phases, elastomeric foams are classified into two major categories: open-cell and closed-cell. These structures elicit a behavior typified by tension-compression nonlinearity and asymmetry, shear-coupling, and a nonlinear Poisson's function. The compressive response characteristically displays a linear-plateau-densification stress-strain profile. Many foams are anisotropic, locally non-affine, and rate- and temperature-sensitive due to microstructural and material effects.
A suite of experiments and tools were designed to evaluate foam behavior and inform model development. This was accomplished in three phases: first, setup and instrumentation; second, quasistatic experiments with a non-localizing, isotropic foam; and third, multi-rate experiments for viscoelasticity. The experimental platform consisted of custom load frames instrumented for digital image correlation (DIC). A new DIC algorithm, using the iterative deformation method and quality factors for cross-correlation, overcame challenges of measuring full-field strain on foam. Stress-stain and axial-transverse strain from tension and compression experiments were used to calibrate a novel continuum model co-developed with collaborators. This model was validated using shear without and with pre-compression, indentation, and inhomogeneous tension. Higher strain-rate experiments were used to calibrate time-dependency in an extended model.
The total corpus of work includes new experimental and analysis tools and results to investigate the mechanics of elastic polymer foams, namely: a new DIC algorithm; an experimental and analytical platform for model development; and, experiments and tools for strain rates ranging from quasistatic to impact-like. These advances yield an improved workflow for characterizing, and thus utilizing, elastomeric foam in engineering applications.
- Subject (fast)
(authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/00910312")
- Topic
- Engineering
- Subject (fast)
(authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/01013446")
- Topic
- Mechanics
- Subject (fast)
(authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/00928480")
- Topic
- Foam
- Subject (fast)
(authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/01011853")
- Topic
- Materials--Mechanical properties
- Subject (fast)
(authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/01167809")
- Topic
- Viscoelastic materials
- Subject (fast)
(authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/01013375")
- Topic
- Mechanical engineering
- Subject (fast)
(authorityURI="http://id.worldcat.org/fast", valueURI="http://id.worldcat.org/fast/01740902")
- Topic
- Polyurethane elastomers
- Language
- Language Term (ISO639-2B)
- English
- Record Information
- Record Content Source (marcorg)
- RPB
- Record Creation Date
(encoding="iso8601")
- 20200227
- Identifier:
DOI
- 10.26300/jqnk-6m25
- Access Condition:
rights statement
(href="http://rightsstatements.org/vocab/InC/1.0/")
- In Copyright
- Access Condition:
restriction on access
- Collection is open for research.
- Type of Resource (primo)
- dissertations