Development of stretchable sensors for enhanced shear characterization of woven fabric composites
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Montazerianoliaee, Hossein
issued: 2018-06-28T15:53:06Z
issued: 2018
related degree: Master of Applied Science - MASc
degree grantor: University of British Columbia
description: Shear is known to be the dominant mode of deformation in woven fabric composites when forming complex, doubly-curved parts. Picture frame (PF) testing has been widely employed in the literature to quantify the mechanical properties of woven fabrics under shearing, albite a number of uncertainty factors present during this test set-up. In the present study, common sources of such uncertainties (imperfections) are first classified and their effects on characterization data are studied, through both analytical and numerical approaches. Namely, the mechanical response of fabrics under PF testing is recognized to be highly sensitive to the imperfections stemmed from either misplacing the fabric into the fixture, or deviation of fixture from an ideal shearing frame. In addition, to prevent the fabric/fixture contacts, corner cut-offs are usually introduced to the fabric by experimenter during PF testing, exacerbating the shear angle mismatches between the sample center and fixture frame. Upon the above general, theoretical assessment of PF test imperfections, their adverse effects on shear characterization of fabrics have been experimentally demonstrated through novel sensors integrated within the yarns of a typical polypropylene/glass plain weave, capturing the local tensile deformation of the material during the shear tests. Finally, a novel frameless picture frame (FPF) shear testing approach was introduced for mitigating of imperfections as seen in the conventional PF test. In the new set-up, the frame is inscribed on the sample itself by locally consolidating the fabric at regions corresponding to the clamping areas in the conventional PF. A high controllability was realized over the sample during preparation and installation phases of the new test set-up. Furthermore, high shear strain deformation behavior as well as normalized force-shear angle response of the fabric was assessed during the FPF testing and was proven to be more consistent than the PF test, by means…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/66363
note: DEVELOPMENT OF STRETCHABLE SENSORS FOR ENHANCED SHEAR CHARACTERIZATION OF WOVEN FABRIC COMPOSITES by Hossein Montazerianoliaee A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF MASTER OF APPLIED SCIENCE in THE COLLEGE OF GRADUATE STUDIES (Mechanical Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) June 2018 © Hossein Montazerianoliaee, 2018 ii The following individuals certify that they have read, and recommend to the College of Graduate Studies for acceptance, a thesis/dissertation entitled: DEVELOPMENT OF STRETCHABLE SENSORS FOR ENHANCED SHEAR CHARACTERIZATION OF WOVEN FABRIC COMPOSITES submitted by Hossein Montazerianoliaee in partial fulfillment of the requirements of the degree of Master of Applied Science . Dr. Abbas. S. Milani, School of Engineering Supervisor Dr. Mina Hoorfar, School of Engineering Co-supervisor Dr. Homayoun Najjaran, School of Engineering Supervisory Committee Member Dr. Shahria Alam, School of Engineering Supervisory Committee Member Dr. Ian Foulds, School of Engineering University Examiner iii Abstract Shear is known to be the dominant mode of deformation in woven fabric composites when forming complex, doubly-curved parts. Picture frame (PF) testing has been widely employed in the literature to quantify the mechanical properties of woven fabrics under shearing, albite a number of uncertainty factors present during this test set-up. In the present study, common sources of such uncertainties (imperfections) are first classified and their effects on characterization data are studied, through both analytical and numerical approaches. Namely, the mechanical response of fabrics under PF testing is recognized to be highly sensitive to the imperfections stemmed from either misplacing the fabric into the fixture, or deviation of fixture from an ideal shearing frame. In addition, to prevent the fabric/fixture contacts, corner cut-offs are usually introduced to the fabric by experimenter during PF testing, ex…
has type: Thesis/Dissertation
date issued: 2018-09
is shown at: 10.14288/1.0368768
language: eng
degree discipline: Mechanical Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
type: Text
identifier URI: http://hdl.handle.net/2429/66363