Thermal anisotropy of a natural fibre

J.L. Thomason, F.R. Cichocki

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

In order to develop structure-property relationships in composite systems, it is often necessary to know the properties of the fiber and matrix constituents. Much research indicates that natural-fibers exhibit a complicated anisotropic structure. Unfortunately, the property anisotropy of most natural fibers has been left undetermined. In this study, dynamic mechanical and thermal mechanical techniques have been employed to measure the elastic and thermal expansion characteristics of a model composite system containing jute fibers over a broad temperature range. The results of these measurements were in turn incorporated into a number of pertinent micro-mechanical models to estimate the thermoelastic properties of the natural fibers. The jute fibers investigated in this study exhibited considerable elastic and thermal expansion anisotropy. The longitudinal Young's modulus of the fibers has been determined to exceed the transverse fiber modulus by as much as an order of magnitude in certain temperature regimes. The fibers exhibit negative thermal expansion coefficients along their lengths; however, large positive thermal expansion coefficients, similar in magnitude to many polymeric materials, have been estimated in the transverse directions.
LanguageEnglish
Title of host publicationProceedings of the Gordon Conference on Composites
Publication statusPublished - 2002

Fingerprint

anisotropy
fibers
thermal expansion
expansion
composite materials
coefficients
modulus of elasticity
temperature
estimates
matrices

Keywords

  • thermal properties
  • elastic properties
  • anisotropy
  • differential thermal analysis (DTA)
  • natural fibers
  • mechanical engineering

Cite this

Thomason, J. L., & Cichocki, F. R. (2002). Thermal anisotropy of a natural fibre. In Proceedings of the Gordon Conference on Composites
Thomason, J.L. ; Cichocki, F.R. / Thermal anisotropy of a natural fibre. Proceedings of the Gordon Conference on Composites. 2002.
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Thomason, JL & Cichocki, FR 2002, Thermal anisotropy of a natural fibre. in Proceedings of the Gordon Conference on Composites.

Thermal anisotropy of a natural fibre. / Thomason, J.L.; Cichocki, F.R.

Proceedings of the Gordon Conference on Composites. 2002.

Research output: Chapter in Book/Report/Conference proceedingChapter

TY - CHAP

T1 - Thermal anisotropy of a natural fibre

AU - Thomason, J.L.

AU - Cichocki, F.R.

PY - 2002

Y1 - 2002

N2 - In order to develop structure-property relationships in composite systems, it is often necessary to know the properties of the fiber and matrix constituents. Much research indicates that natural-fibers exhibit a complicated anisotropic structure. Unfortunately, the property anisotropy of most natural fibers has been left undetermined. In this study, dynamic mechanical and thermal mechanical techniques have been employed to measure the elastic and thermal expansion characteristics of a model composite system containing jute fibers over a broad temperature range. The results of these measurements were in turn incorporated into a number of pertinent micro-mechanical models to estimate the thermoelastic properties of the natural fibers. The jute fibers investigated in this study exhibited considerable elastic and thermal expansion anisotropy. The longitudinal Young's modulus of the fibers has been determined to exceed the transverse fiber modulus by as much as an order of magnitude in certain temperature regimes. The fibers exhibit negative thermal expansion coefficients along their lengths; however, large positive thermal expansion coefficients, similar in magnitude to many polymeric materials, have been estimated in the transverse directions.

AB - In order to develop structure-property relationships in composite systems, it is often necessary to know the properties of the fiber and matrix constituents. Much research indicates that natural-fibers exhibit a complicated anisotropic structure. Unfortunately, the property anisotropy of most natural fibers has been left undetermined. In this study, dynamic mechanical and thermal mechanical techniques have been employed to measure the elastic and thermal expansion characteristics of a model composite system containing jute fibers over a broad temperature range. The results of these measurements were in turn incorporated into a number of pertinent micro-mechanical models to estimate the thermoelastic properties of the natural fibers. The jute fibers investigated in this study exhibited considerable elastic and thermal expansion anisotropy. The longitudinal Young's modulus of the fibers has been determined to exceed the transverse fiber modulus by as much as an order of magnitude in certain temperature regimes. The fibers exhibit negative thermal expansion coefficients along their lengths; however, large positive thermal expansion coefficients, similar in magnitude to many polymeric materials, have been estimated in the transverse directions.

KW - thermal properties

KW - elastic properties

KW - anisotropy

KW - differential thermal analysis (DTA)

KW - natural fibers

KW - mechanical engineering

UR - http://eprints.cdlr.strath.ac.uk/5081/

UR - http://dx.doi.org/10.1016/S0266-3538(02)00011-8

UR - http://www.grc.org/programs.aspx?year=2002&program=composit

M3 - Chapter

BT - Proceedings of the Gordon Conference on Composites

ER -

Thomason JL, Cichocki FR. Thermal anisotropy of a natural fibre. In Proceedings of the Gordon Conference on Composites. 2002