X-Ray Stress Measurement in Graphite/Epoxy Composites

dc.contributor.author Predecki, P.
dc.contributor.author Barrett, C.
dc.date 2018-02-13T17:31:32.000
dc.date.accessioned 2020-06-30T01:28:33Z
dc.date.available 2020-06-30T01:28:33Z
dc.date.copyright Tue Jan 01 00:00:00 UTC 1980
dc.date.embargo 2013-11-15
dc.date.issued 1980-07-01
dc.description.abstract <p>Small amounts (< 2 mg/cm2) of Al and Nb filler powders were incorporated between the first and second plies of 6-ply unidirectional graphite/epoxy laminates. Cu Kα<sub>1</sub> X-rays were diffracted from specific crystallographic planes in these fillers: 333 + 511 for Al and 411 + 330 for Nb, giving peaks in the back reflection region. The peak positions shifted linearly with stress applied to the laminates in the fiber direction and had stress sensitivities of 8.52 and 3.92 x 10<sup>-4</sup> deg 2θ/MPa for Al and Nb respectively. Elastic strains in the filler particles measured by X-rays were found to be proportional to the corresponding composite strains measured by strain gages, in agreement with the model of H. T. Hahn. Residual strains and stresses in filler particles were also measured.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/cnde_yellowjackets_1979/41/
dc.identifier.articleid 1036
dc.identifier.contextkey 4826862
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath cnde_yellowjackets_1979/41
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/16081
dc.language.iso en
dc.relation.ispartofseries Interdisciplinary Program for Quantitative Flaw Definition Annual Reports
dc.source.bitstream archive/lib.dr.iastate.edu/cnde_yellowjackets_1979/41/1979_YellowJacket_036_Predecki_XRayStress.pdf|||Sat Jan 15 00:09:14 UTC 2022
dc.subject.disciplines Materials Science and Engineering
dc.subject.keywords Nondestructive Evaluation
dc.title X-Ray Stress Measurement in Graphite/Epoxy Composites
dc.type article
dc.type.genre 07_nonmetallic_nde_acoustic_microscopy
dspace.entity.type Publication
relation.isSeriesOfPublication 43920e40-d127-4f4c-9087-dc709815fe7f
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