Damage development under compression-compression fatigue loading in a stitched uniwoven graphite/epoxy composite material

Simple item page
dc.contributor.authorVandermey, Nancy E.en
dc.contributor.departmentEngineering Mechanicsen
dc.date.accessioned2014-03-14T21:48:14Zen
dc.date.adate2009-10-24en
dc.date.available2014-03-14T21:48:14Zen
dc.date.issued1991en
dc.date.rdate2009-10-24en
dc.date.sdate2009-10-24en
dc.description.abstractDamage initiation and growth under compression-compression fatigue loading were investigated for a stitched uniweave material system with an underlying AS4/3501-6 quasi-isotropic layup. Performance of unnotched specimens having stitch rows at either 0° or 90° to the loading direction was compared. Special attention was given to the effects of stitching-related manufacturing defects. Damage evaluation techniques included edge replication, stiffness monitoring, X-ray radiography, residual compressive strength, and laminate sectioning. It was found that the manufacturing defect of inclined stitches had the greatest adverse effect on material performance. 0° and 90° specimen performances were generally the same. While the stitches were the source of damage initiation, they also slowed damage propagation both along the length and across the width and affected through the thickness damage growth. A pinched layer zone formed by the stitches particularly affected damage initiation and growth. The compression failure mode was transverse shear for all specimens, both in static compression and fatigue cycling tests. Specimens without stitches were not available for comparison.en
dc.description.degreeMaster of Scienceen
dc.format.extentix, 114 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-10242009-020345en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10242009-020345/en
dc.identifier.urihttp://hdl.handle.net/10919/45318en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1991.V367.pdfen
dc.relation.isformatofOCLC# 24112613en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1991.V367en
dc.subject.lcshComposite materials -- Researchen
dc.subject.lcshStitch-bonded fabricsen
dc.titleDamage development under compression-compression fatigue loading in a stitched uniwoven graphite/epoxy composite materialen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineEngineering Mechanicsen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
LD5655.V855_1991.V367.pdf
Size:
50.26 MB
Format:
Adobe Portable Document Format
Description:
Download

Collections

Masters Theses