Show simple item record

dc.contributor.authorSensmeier, Mark D. (Mark David)en
dc.date.accessioned2014-03-14T21:50:18Zen
dc.date.available2014-03-14T21:50:18Zen
dc.date.issued1987-05-05en
dc.identifier.otheretd-11202012-040111en
dc.identifier.urihttp://hdl.handle.net/10919/45895en
dc.description.abstractIn support of crashworthiness studies of composite airframes, the present study was undertaken to understand the large deflection flexural response and failure of graphite-epoxy laminated beams. The beam specimens were subjected to eccentric axial impact loads and to static eccentric axial loads, in order to assess the damage caused by impact. A geometrically and materially nonlinear analysis of the response and failure of the static test specimens is presented. The analysis employed an incremental, noniterative finite element model based on the Kantrovich method and a corotational solution technique. Width-wise effects are included by assuming specific forms of the displacements across the width, with length-wise variation introduced as a degree of freedom. This one-dimensional, 22 degree of freedom finite element accurately predicted the load-deflection and strain-deflection responses of the static test specimens. Inclusion of nonlinear material behavior was found to be important in correctly predicting load-deflection response of uniaxial materials, while inclusion of width-wise effects was determined to be more important for laminates with off-axis plies due to the existence of coupling between bending and twisting curvatures (D16and D26). Once material nonlinearity begins to occur in flexure, even symmetric laminates exhibit bending-stretching coupling due to different material response in tension and compression.en
dc.format.extentxviii, 232 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.publisherVirginia Techen
dc.relation.isformatofOCLC# 16736483en
dc.relation.haspartLD5655.V855_1987.S467.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1987.S467en
dc.subject.lcshAirplanes -- Crashworthinessen
dc.subject.lcshComposite materialsen
dc.subject.lcshFinite element methoden
dc.titleStatic and dynamic large deflection flexural response of graphite- epoxy beamsen
dc.typeThesisen
dc.contributor.departmentEngineering Science and Mechanicsen
dc.description.degreeMaster of Scienceen
thesis.degree.nameMaster of Scienceen
thesis.degree.levelmastersen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.disciplineEngineering Science and Mechanicsen
dc.contributor.committeechairGriffin, Odis Hayden Jr.en
dc.contributor.committeememberJohnson, Eric R.en
dc.contributor.committeememberHerakovich, Carl T.en
dc.type.dcmitypeTexten
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11202012-040111/en
dc.date.sdate2012-11-20en
dc.date.rdate2012-11-20en
dc.date.adate2012-11-20en


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record