Thermoelastic anisotropy of a natural fiber

F.R. Cichocki, J.L. Thomason

Research output: Contribution to journalArticle

111 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)669-678
Number of pages9
JournalComposites Science and Technology
Volume62
Issue number5
DOIs
Publication statusPublished - 2002

Fingerprint

Natural fibers
Anisotropy
Thermal expansion
Jute fibers
Fibers
Large scale systems
Elastic moduli
Temperature
Polymers

Keywords

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

Cite this

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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.",
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Thermoelastic anisotropy of a natural fiber. / Cichocki, F.R.; Thomason, J.L.

In: Composites Science and Technology, Vol. 62, No. 5, 2002, p. 669-678.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Thermoelastic anisotropy of a natural fiber

AU - Cichocki, F.R.

AU - Thomason, J.L.

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 fiber

KW - mechanical engineering

KW - thermoelastic anisotropy

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

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DO - 10.1016/S0266-3538(02)00011-8

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JO - Composites Science and Technology

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IS - 5

ER -