ProQuest Dissertations & Theses Global
Abstract/Details

In-situ synchrotron x-ray and micro-computed tomography of nonwoven aramids: Deformation mechanisms

Uzun, Simge.  Cornell University. ProQuest Dissertations Publishing, 2017. 10253586.

Abstract (summary)

Nonwoven materials have attracted much interest in the industry due to their high surface area, high porosity, and low cost. However due to the complexity of deformation mechanisms in these materials, controlling the mechanical properties has been challenging. Therefore, it is important to establish the fundamental understanding of the relationship between the microstructure and the macroscopic behavior. Motivated by this, mechanical properties and deformation mechanisms of aramid nonwovens as a function of areal weight were reported using several analytical tools. The initial fiber orientation alignment was found significantly different within the nonwoven types according to XRD patterns. Fiber orientation evolution under both monotonic tensile and stress relaxation tests was tracked using in-situ X-ray diffraction. As the strain increased, fiber alignment along the loading direction was observed in all three types of nonwovens. Results suggested that the areal weight is not necessarily a predictor of the mechanical properties of aramid nonwovens as the fiber alignment plays a vital role in the performance of these materials.

Indexing (details)


Subject
Engineering;
Textile Research
Classification
0537: Engineering
0994: Textile Research
Identifier / keyword
Applied sciences; Computed tomography; Mechanical properties; Polymer fibers; X-ray diffraction
Title
In-situ synchrotron x-ray and micro-computed tomography of nonwoven aramids: Deformation mechanisms
Author
Uzun, Simge
Number of pages
67
Degree date
2017
School code
0058
Source
MAI 56/02M(E), Masters Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
978-1-369-55501-1
Advisor
Hinestroza, Juan P.; Silberstein, Meredith
University/institution
Cornell University
Department
Fiber Science and Apparel Design
University location
United States -- New York
Degree
M.S.
Source type
Dissertation or Thesis
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
10253586
ProQuest document ID
1864759565
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
https://www.proquest.com/pqdtglobal/docview/1864759565/673DE68FCD67449CPQ/9