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Modeling the tensile behavior of fiber bundles with irregular constituent fibers
journal contribution
posted on 2004-01-01, 00:00 authored by W He, Xungai WangIn this paper, the effect of fiber dimensional irregularities on the tensile behavior of fiber bundles is modeled, using the finite element method (FEM). Fiber dimensional irregularities are simulated with sine waves of different magnitude. The specific stress-strain curves of fiber bundles and the constituent single fibers are obtained and compared. The results indicate that fiber diameter irregularity along fiber length has a significant effect on the tensile behavior of the fiber bundle. For a bundle of uniform fibers of different diameters, all constituent fibers will break simultaneously regardless of the fiber diameter. Similarly, if fibers within a bundle have the same pattern and level of diameter irregularity along fiber length, the fibers will break at the same time also regardless of the difference in average diameter of each fiber. In these cases, the specific stress and strain curve for the bundle overlaps with that of the constituent fibers. When the fiber bundle consists of single fibers with different levels of diameter irregularity, the specific stress-strain and load-elongation curves of the fiber bundle exhibit a stepped or “ladder” shape. The fiber with the highest irregularity breaks first, even when the thinnest section of the fiber is still coarser than the diameter of a very thin but uniform fiber in the bundle. This study suggests that fiber diameter irregularity along fiber length is a more important factor than the fiber diameter itself in determining the tensile behavior of a fiber bundle consisting of irregular fibers.
History
Journal
Journal of applied polymer scienceVolume
93Issue
6Pagination
2664 - 2668Publisher
WileyLocation
New York, NY.Publisher DOI
ISSN
0021-8995eISSN
1097-4628Language
engNotes
Published in Journal of applied polymer science, vol 93, no 6, 2004 at www.interscience.wiley.comPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2004, Wiley Periodicals, Inc.Usage metrics
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