Structure and properties of some vegetable fibres

Fique Fiber Tensile Elastic Modulus Dependence with Diameter Using the Weibull Statistical Analysis

“…From 100 fibers randomly selected from the bundle, each corresponding equivalent diameter was directly measured in a model 6C Nikon profile projector. The equivalent diameter was obtained, following procedures indicated in several works 1,[24][25][26][27][28] , as an average between the larger and smaller (90° rotation) cross section dimensions at five locations along the fiber's length. By considering the fiber with irregular cross-section (distinct dimensions in 90° rotation), the average measurements were associated with the fiber equivalent diameter.…”

“…Investigation on changes in mechanical properties as a function of lignocellulosic fiber diameter has been reported since more than four decades [24][25][26][27][28][29][30] . Earlier international research groups investigated coir 24 , banana 25 , sisal 26 , pineapple 27 , palmyrah and talipot 28 fibers.…”

“…Earlier international research groups investigated coir 24 , banana 25 , sisal 26 , pineapple 27 , palmyrah and talipot 28 fibers. In these earlier works no correlation was proposed for the variation of mechanical properties with fiber diameter.…”

Selection of high strength natural fibers

“…For pineapple fibers [22], the strength decreases linearly with the diameter within the interval from 45 to 205 µm. Decrease in elastic modulus and elongation were also observe for increasing both the diameter and fiber test length.…”

“…Additionally, inverse hyperbolic correlations were suggested to hold between the strength and the diameter of each type of fiber. The mentioned work [18] also indicated that correlations between lignocellulosic fibers dimensions and their mechanical properties have been early investigated [19][20][21][22][23][24][25]. For coir fiber [19], it was found that the strength and elongation seem to increase in the range of diameters from 100 to 200 µm and then remain constant up to 450 µm.…”