Mechano-physical properties and statistical design of jute yarns

Abstract

The work describes the statistical characterization of the tensile properties of raw and treated jute yarn fibers. The yarns are treated with various alkaline sodium hydroxide concentrations (0.5, 2 and 5%) and different immersion times at room temperature (30 minutes, 2, 8 and 12 hours). Due to the scattering of the experimental results, statistical analysis was performed using both two-and three-parameters Weibull, and Anova variance methods. In terms of stress, failure strain, and Young modulus, the results obtained from uniaxial tensile yarns show a variation that depends essentially on the immersion time and the NaOH concentration. Optimum mechanical properties are obtained for a concentration of 2% of NaOH and an immersion time of 2 hours. The results are further discussed in view of an extensive Fourier Transform Infrared Spectroscopy (FTIR) analysis carried out on the different classes of yarns.

Effect of Hot-Alkali Treatment on the Structure Composition of Jute Fabrics and Mechanical Properties of Laminated Composites

“…With the increasing depletion of petroleum resources, the development and utilization of new environment-friendly structural and functional materials has become imperative [1,2,3,4]. Nowadays, the environmental protection materials are advocated.…”

Impact of Surface Treatment of Flax Fibers on Tensile Mechanical Properties Accompanied by A Statistical Study

“…The two-parameter Weibull distribution was applied for the mechanical properties ie the tensile stress and the Young's modulus which showed a large dispersion of the results (Figure. 4), so the Weibull equation is as follows [4,16]:…”

“…Where F(χ) is the probability of survival depending on the parameter χ, m is a dimensionless shape parameter directly related to the dispersions of the experimental data, and χ0 is a local parameter representing an average value of the parameter χ (minimum life of stress, strain and modulus), [4,16,18,27]. The value F is evaluated by a metric estimator (value of an average rank) [17][18][19]:…”

“…This sector is more and more interested in plant fibers in order to use renewable and perennial materials or in secondary structures in applications that respond to the concern for the preservation of the environment. [11][12][13][14][15][16][17][18][19][20][21][22]. All natural fibers are composed of Cellulose, hemicelluloses and Lignin, these elements have an impact on the mechanical propertiess [23][24][25][26].…”

“…An experimental study presented by Saaidia et al [16] on the mechano-physical properties accompanied by a statistical study of treated and untreated jute yarns. The mechanical properties namely the Young's modulus, the stress and the deformation at break had an increase at low concentrations of NaOH (2%) and at low immersion time (2h) of 5-34% for stress from (117.7 to 178.4 MPa) and from 5 to 25% for the Young's modulus (19.78 to 26.4 GPa) relative to the untreated fibers against mechanical properties at high concentrations of NaOH (5%, 10% and 25%).…”