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Textile Research Journal
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Effect of Environmental Relative Humidity and Damage on the Tensile Properties of Flax and Nettle Fibers

G.C. Davies

Silsoe Research Institute, Wrest Park, Silsoe, Bedford, MK45 4HS, United Kingdom

D.M. Bruce

Silsoe Research Institute, Wrest Park, Silsoe, Bedford, MK45 4HS, United Kingdom

The effects of environmental conditions and mechanical damage on the tensile stiffness and strength of two natural fibers, flax and nettle, are investigated. Flax and nettle both contain cellulosic fiber bundles in the outer layer of the plant, each bundle comprising many individual cells bonded together. Novel experimental equipment is designed and constructed to measure, under varying environmental conditions, the static and dynamic tensile moduli and the strength of individual fiber cells. As previous work has shown, the tensile modulus is dependent on environ mental relative humidity, but the effect of fiber damage is also significant. There is a correlation between the extent of damage, measured as the proportion of the fiber showing as bright under a polarizing microscope, and the modulus. When the effect of damage is taken into account, there is a consistent relationship between modulus and relative humidity.

Textile Research Journal, Vol. 68, No. 9, 623-629 (1998)
DOI: 10.1177/004051759806800901
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 Journal of Composite MaterialsHome page
J. Andersons, E. Sparnins, and E. Porike
Strength and Damage of Elementary Flax Fibers Extracted from Tow and Long Line Flax
Journal of Composite Materials, October 1, 2009; 43(22): 2653 - 2664.
[Abstract] [PDF]