MECHANICAL CHARACTERIZATION – MONOTONIC MICRO-TENSILE, STRESS RELAXATION, AND STRAIN-CONTROLLED CYCLIC STRESS-STRAIN RESPONSES OF SINGLE ELECTROSPUN PVDF NANOFIBERS

MECHANICAL CHARACTERIZATION – MONOTONIC MICRO-TENSILE, STRESS RELAXATION, AND STRAIN-CONTROLLED CYCLIC STRESS-STRAIN RESPONSES OF SINGLE ELECTROSPUN PVDF NANOFIBERS

Bibliographic Details
Main Author: Falola, Adekunle Samuel
Language:English
Published: University of Akron / OhioLINK 2019
Subjects:
Mechanical Engineering
Materials Science
Polymers
Single Electrospun Nanofibers
Mechanical Characterization
Stress Relaxation
Micro-Tensile
Cyclic Stress-Strain
Fatigue of Nanofibers
Electrospinning
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=akron1564557199987647
id ndltd-OhioLink-oai-etd.ohiolink.edu-akron1564557199987647
record_format oai_dc
spelling ndltd-OhioLink-oai-etd.ohiolink.edu-akron15645571999876472021-08-03T07:12:14Z MECHANICAL CHARACTERIZATION – MONOTONIC MICRO-TENSILE, STRESS RELAXATION, AND STRAIN-CONTROLLED CYCLIC STRESS-STRAIN RESPONSES OF SINGLE ELECTROSPUN PVDF NANOFIBERS Falola, Adekunle Samuel Mechanical Engineering Materials Science Polymers Single Electrospun Nanofibers Mechanical Characterization Stress Relaxation Micro-Tensile Cyclic Stress-Strain Fatigue of Nanofibers Electrospinning There is a fast-growing demand for electrospun nanofibers as the choice materials for several technological applications. They typically have large surface area to volume ratio, high porosity meshes, small pore size distribution, structural strength, lightweight, and toughness, all of which enhances their mechanical properties. The nano-scale mechanical behavior of the material, particularly those properties that may influence performance of components made from these materials were investigated. Single electrospun PVDF nanofiber samples were tested for monotonic micro-tensile, stress relaxation, and cyclic stress-strain fatigue behavior. The preliminaries of this study involved electrospinning of PVDF (DMF/ACE 3:1) nanofibers. In the process, a novel method for collection and isolation of single electrospun nanofibers was developed. The single PVDF nanofiber samples showed characteristics non-Hookean behavior and size-dependent properties when pulled for micro-tensile tests. The repetitive stress relaxation of the single electrospun PVDF nanofiber samples showed that the samples sets resulting in decline in cumulative performances. The smaller sized, 0.86μm, single fiber displayed better stress relaxation capability when compared to the 1.07μm sample. The S-N plots obtained from the cyclic stress-strain showed that larger sized PVDF single nanofiber samples, which have higher yield strength, displayed higher S-N curve when compared to the smaller sized samples. The manner of failure and mechanisms during cyclic stress-straining are rather complex. An analysis of the images after cyclic straining revealed that the samples developed features that may be caused by molecular birefringence or fiber fragmentation. 2019-08-29 English text University of Akron / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=akron1564557199987647 http://rave.ohiolink.edu/etdc/view?acc_num=akron1564557199987647 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Mechanical Engineering
Materials Science
Polymers
Single Electrospun Nanofibers
Mechanical Characterization
Stress Relaxation
Micro-Tensile
Cyclic Stress-Strain
Fatigue of Nanofibers
Electrospinning
spellingShingle Mechanical Engineering
Materials Science
Polymers
Single Electrospun Nanofibers
Mechanical Characterization
Stress Relaxation
Micro-Tensile
Cyclic Stress-Strain
Fatigue of Nanofibers
Electrospinning
Falola, Adekunle Samuel
MECHANICAL CHARACTERIZATION – MONOTONIC MICRO-TENSILE, STRESS RELAXATION, AND STRAIN-CONTROLLED CYCLIC STRESS-STRAIN RESPONSES OF SINGLE ELECTROSPUN PVDF NANOFIBERS
author Falola, Adekunle Samuel
author_facet Falola, Adekunle Samuel
author_sort Falola, Adekunle Samuel
title MECHANICAL CHARACTERIZATION – MONOTONIC MICRO-TENSILE, STRESS RELAXATION, AND STRAIN-CONTROLLED CYCLIC STRESS-STRAIN RESPONSES OF SINGLE ELECTROSPUN PVDF NANOFIBERS
title_short MECHANICAL CHARACTERIZATION – MONOTONIC MICRO-TENSILE, STRESS RELAXATION, AND STRAIN-CONTROLLED CYCLIC STRESS-STRAIN RESPONSES OF SINGLE ELECTROSPUN PVDF NANOFIBERS
title_full MECHANICAL CHARACTERIZATION – MONOTONIC MICRO-TENSILE, STRESS RELAXATION, AND STRAIN-CONTROLLED CYCLIC STRESS-STRAIN RESPONSES OF SINGLE ELECTROSPUN PVDF NANOFIBERS
title_fullStr MECHANICAL CHARACTERIZATION – MONOTONIC MICRO-TENSILE, STRESS RELAXATION, AND STRAIN-CONTROLLED CYCLIC STRESS-STRAIN RESPONSES OF SINGLE ELECTROSPUN PVDF NANOFIBERS
title_full_unstemmed MECHANICAL CHARACTERIZATION – MONOTONIC MICRO-TENSILE, STRESS RELAXATION, AND STRAIN-CONTROLLED CYCLIC STRESS-STRAIN RESPONSES OF SINGLE ELECTROSPUN PVDF NANOFIBERS
title_sort mechanical characterization – monotonic micro-tensile, stress relaxation, and strain-controlled cyclic stress-strain responses of single electrospun pvdf nanofibers
publisher University of Akron / OhioLINK
publishDate 2019
url http://rave.ohiolink.edu/etdc/view?acc_num=akron1564557199987647
work_keys_str_mv AT falolaadekunlesamuel mechanicalcharacterizationmonotonicmicrotensilestressrelaxationandstraincontrolledcyclicstressstrainresponsesofsingleelectrospunpvdfnanofibers
_version_ 1719456005363859456

Similar Items