Optimization of the Young's modulus of woven composite material made by Raphia vinifiera fiber/epoxy

Abstract

This work focuses on the optimal design of the woven fabrics made from Raphia vinifiera, fiber, and their contribution as reinforcing element in the epoxy matrix. The work is done alternately experimentally and theoretically. The woven made of canvas, twill and satin armor are characterized in traction according to the ISO13934-1 standard [1]. A predictive mathematical model of Young's modulus of the woven with the greatest rigidity is established. The woven reinforcement composite made is characterized in traction and bending according to EN ISO 527-5 [2] and NF EN ISO 14125 [3] standards. In order to determine the reinforcement rate which gives the highest young modulus of the material, the gradient method was applied on some prediction equations of Young's modulus of composite material. Then find the prediction equation that best corresponds to the composite made. The results showed that mathematical modeling works corroborates with experimental works. On the woven fabrics the canvas armor has the highest Young's modulus in the warp and weft direction (2.429, 21.164 GPa). Followed by twill (2315, 18 741 GPa) and satin (2184, 18.54 GPa). On the composite, the reinforcement rate from which the material is optimized is 50%. The composite young's moduli in the warp and weft direction resulting from the tensile and bending tests of the composite are respectively (3.644, 7.31 GPa) and (1.802, 4.52). In a nutshell, this work presents the theoretical and experimental aspect of the best material which can be obtained with R. vinifiera fiber with respect to its Young modulus.

Effect of Raphia vinifera Fibre Size and Reinforcement Ratio on the Physical and Mechanical Properties of an Epoxy Matrix Composite: Micromechanical Modelling and Weibull Analysis

“…As the demand for bio-composites with plant fibre reinforcements is increasing [7], the development of a predictive model to characterise (mechanical, physical) a material without having to resort to experimentation can save time and costs by making composites more accessible [11]. Among the methods for predicting the characteristics of short fibres composites is mathematical homogenisation [12], which is achieved by empirical models such as the law of mixtures [13], Halpin-Tsai (HT) [14], Cox-Krenkel [15], or Kelly and Tyson models [16], which allow the analytical prediction of the mechanical behaviour of composites, saving considerable time in the process of popularising bio-composites [17]. Among the methods of all the statistical analysis methods, only the weibull method [18], offers the particularity of providing information on the severity of the factors inducing the failure of the composite while predicting its mechanical behaviour [19].…”

“…Several studies have been carried out on Raphia vinifera fibres (RVFs) from the stem to determine its mechanical and physical properties for potential application in composites [24]. This work has shown that RVF can be used for the development of bio-composites [17] and the production of cellulose [25]. Work on the development of composites reinforced with RVF from sheets has shown that the addition of short, random fibres reduces the mechanical properties (modulus and strength) of the polyester matrix [26].…”

Thermo- physics behaviour of raphia vinifera/ Epoxy woven material: Experimental and theoretical approach

“…This work begins with the modeling and simulation of heat transfer by conduction through the composite raffia vinifiera fiber, epoxy resin by the finite element method in Abaqus software. Then by the realization and the physical and thermal characterization of the composite since a mechanical characterization of the material was already made (Djoumessi et al, 2022). Finally, by a comparative study between the theoretical results and those experimental; as well as those of the literature.…”