Transverse mechanical properties of unidirectional hybrid fiber composites

Charles E. Bakis, M. J. Ripepi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Much experimental characterization and theoretical modeling on the mechanical properties of hybrid fiber composites in the fiber direction can be found in the literature. For the direction transverse to the fibers, theoretical models for the elastic properties of hybrid composites are available, but no experimental data could be found by the authors. Therefore, the objectives of the current investigation are to manufacture unidirectional carbon and E-glass hybrid fiber composites of various fiber proportions by a filament winding process, to characterize the elastic modulus and flexural strength of beam specimens tested transversely to the fibers, and to evaluate several analytical models for the transverse elastic modulus. The nominal compositions tested included 100% carbon, 75% carbon and 25% glass, 50% carbon and 50% glass with two differently shaped regions of carbon and glass fiber, 25% carbon and 75% glass, and 100% glass. The modulus increased monotonically with an increasing glass-to-carbon ratio. The tension-governed flexural strength was higher in the all-glass composite than the allcarbon composite, but the hybrids all had nearly the same strength halfway between the non-hybrids. A modified iso-stress model had the best correlation with the experimental modulus data and a modified Halpin Tsai model was second best. The conventional iso-stress model consistently under-predicted the experimental moduli, as expected for a lower bound model.

Original languageEnglish (US)
Title of host publicationProceedings of the American Society for Composites - 30th Technical Conference, ACS 2015
EditorsXinran Xiao, Dahsin Liu, Alfred Loos
PublisherDEStech Publications
ISBN (Electronic)9781605952253
StatePublished - Jan 1 2015
Event30th Annual Technical Conference of the American Society for Composites, ASC 2015 - East Lansing, United States
Duration: Sep 28 2015Sep 30 2015

Publication series

NameProceedings of the American Society for Composites - 30th Technical Conference, ACS 2015

Other

Other30th Annual Technical Conference of the American Society for Composites, ASC 2015
CountryUnited States
CityEast Lansing
Period9/28/159/30/15

Fingerprint

Carbon
Glass
Mechanical properties
Fibers
Composite materials
Bending strength
Elastic moduli
Filament winding
Glass fibers
Carbon fibers
Analytical models
Chemical analysis
Direction compound

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

Cite this

Bakis, C. E., & Ripepi, M. J. (2015). Transverse mechanical properties of unidirectional hybrid fiber composites. In X. Xiao, D. Liu, & A. Loos (Eds.), Proceedings of the American Society for Composites - 30th Technical Conference, ACS 2015 (Proceedings of the American Society for Composites - 30th Technical Conference, ACS 2015). DEStech Publications.
Bakis, Charles E. ; Ripepi, M. J. / Transverse mechanical properties of unidirectional hybrid fiber composites. Proceedings of the American Society for Composites - 30th Technical Conference, ACS 2015. editor / Xinran Xiao ; Dahsin Liu ; Alfred Loos. DEStech Publications, 2015. (Proceedings of the American Society for Composites - 30th Technical Conference, ACS 2015).
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abstract = "Much experimental characterization and theoretical modeling on the mechanical properties of hybrid fiber composites in the fiber direction can be found in the literature. For the direction transverse to the fibers, theoretical models for the elastic properties of hybrid composites are available, but no experimental data could be found by the authors. Therefore, the objectives of the current investigation are to manufacture unidirectional carbon and E-glass hybrid fiber composites of various fiber proportions by a filament winding process, to characterize the elastic modulus and flexural strength of beam specimens tested transversely to the fibers, and to evaluate several analytical models for the transverse elastic modulus. The nominal compositions tested included 100{\%} carbon, 75{\%} carbon and 25{\%} glass, 50{\%} carbon and 50{\%} glass with two differently shaped regions of carbon and glass fiber, 25{\%} carbon and 75{\%} glass, and 100{\%} glass. The modulus increased monotonically with an increasing glass-to-carbon ratio. The tension-governed flexural strength was higher in the all-glass composite than the allcarbon composite, but the hybrids all had nearly the same strength halfway between the non-hybrids. A modified iso-stress model had the best correlation with the experimental modulus data and a modified Halpin Tsai model was second best. The conventional iso-stress model consistently under-predicted the experimental moduli, as expected for a lower bound model.",
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Bakis, CE & Ripepi, MJ 2015, Transverse mechanical properties of unidirectional hybrid fiber composites. in X Xiao, D Liu & A Loos (eds), Proceedings of the American Society for Composites - 30th Technical Conference, ACS 2015. Proceedings of the American Society for Composites - 30th Technical Conference, ACS 2015, DEStech Publications, 30th Annual Technical Conference of the American Society for Composites, ASC 2015, East Lansing, United States, 9/28/15.

Transverse mechanical properties of unidirectional hybrid fiber composites. / Bakis, Charles E.; Ripepi, M. J.

Proceedings of the American Society for Composites - 30th Technical Conference, ACS 2015. ed. / Xinran Xiao; Dahsin Liu; Alfred Loos. DEStech Publications, 2015. (Proceedings of the American Society for Composites - 30th Technical Conference, ACS 2015).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - Much experimental characterization and theoretical modeling on the mechanical properties of hybrid fiber composites in the fiber direction can be found in the literature. For the direction transverse to the fibers, theoretical models for the elastic properties of hybrid composites are available, but no experimental data could be found by the authors. Therefore, the objectives of the current investigation are to manufacture unidirectional carbon and E-glass hybrid fiber composites of various fiber proportions by a filament winding process, to characterize the elastic modulus and flexural strength of beam specimens tested transversely to the fibers, and to evaluate several analytical models for the transverse elastic modulus. The nominal compositions tested included 100% carbon, 75% carbon and 25% glass, 50% carbon and 50% glass with two differently shaped regions of carbon and glass fiber, 25% carbon and 75% glass, and 100% glass. The modulus increased monotonically with an increasing glass-to-carbon ratio. The tension-governed flexural strength was higher in the all-glass composite than the allcarbon composite, but the hybrids all had nearly the same strength halfway between the non-hybrids. A modified iso-stress model had the best correlation with the experimental modulus data and a modified Halpin Tsai model was second best. The conventional iso-stress model consistently under-predicted the experimental moduli, as expected for a lower bound model.

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PB - DEStech Publications

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Bakis CE, Ripepi MJ. Transverse mechanical properties of unidirectional hybrid fiber composites. In Xiao X, Liu D, Loos A, editors, Proceedings of the American Society for Composites - 30th Technical Conference, ACS 2015. DEStech Publications. 2015. (Proceedings of the American Society for Composites - 30th Technical Conference, ACS 2015).