Title:
Co-cured composite joint strength investigation based on behavior characterization of [0/±θ/90]s family

Simple item page
dc.contributor.advisor Armanios, Erian A.
dc.contributor.author Tan, Xinyuan en_US
dc.contributor.committeeMember Dancila, D. Stefan
dc.contributor.committeeMember Declercq, Nico F.
dc.contributor.committeeMember Haj-Ali, Rami
dc.contributor.committeeMember Johnson, W. Steven
dc.contributor.department Aerospace Engineering en_US
dc.date.accessioned 2009-01-22T15:47:28Z
dc.date.available 2009-01-22T15:47:28Z
dc.date.issued 2008-11-17 en_US
dc.description.abstract Joints provide a path for transfer of load and are important components in an assembly of structures, particularly in translating joint strength improvements directly to significant cost savings. This cost savings is more evident in composite joints since manufacturing of more complex single piece components results in a reduction of both part count and labor. An improvement in joint strength for co-cured composite joints through minimized free-edge delamination was investigated for quasi-isotropic [0/±45/90]s lay-up based on the quantitative assessments of the quasi-static and fatigue strength and qualitative understanding of the fatigue damage initiation and propagation for the [0/±θ/90]s family of co-cured composite joints. A previously proposed co-cured joint concept, the Single Nested Overlap (SNO) joint, was compared against a Straight Laminate (SL) and a single lap joint. The SL represents a "perfect" joint and serves as an upper bound whereas the single lap joint represents the simplest generic joint and is the base design for the SNO joint concept. Three categorized failure types, which represented predominant failure modes in the SL, single lap and SNO joints, along with two different fatigue strength indicators were used for quasi-static and fatigue strength comparison. With fatigue run-out defined at 1 x 106 cycles, the fatigue damage initiation and propagation at high loadings was monitored with an Infrared Thermoelastic Stress Analysis (IR-TSA) technique, while a damage type comparison was used at low loadings. Quasi-static Acoustic Emission (AE) counts were observed to be Fatigue Limit (FL) predictors for [0/±θ/90]s SL and SNO joints. The validity of these FL predictors were also assessed in the damage type comparison. en_US
dc.description.degree Ph.D. en_US
dc.identifier.uri http://hdl.handle.net/1853/26578
dc.publisher Georgia Institute of Technology en_US
dc.subject IR-TSA en_US
dc.subject Edge delamination en_US
dc.subject NDE en_US
dc.subject Fatigue en_US
dc.subject Composite joints en_US
dc.subject.lcsh Composite materials Delamination
dc.subject.lcsh Composite materials
dc.subject.lcsh Joints (Engineering)
dc.title Co-cured composite joint strength investigation based on behavior characterization of [0/±θ/90]s family en_US
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.corporatename College of Engineering
local.contributor.corporatename Daniel Guggenheim School of Aerospace Engineering
local.relation.ispartofseries Doctor of Philosophy with a Major in Aerospace Engineering
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
relation.isOrgUnitOfPublication a348b767-ea7e-4789-af1f-1f1d5925fb65
relation.isSeriesOfPublication f6a932db-1cde-43b5-bcab-bf573da55ed6
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
tan_xinyuan_200812_phd.pdf
Size:
24.5 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Theses and Dissertations