The main objective of this paper is the evaluation possibility using a gypsum mortar reinforced with doum palm fibers as thermal insulators in building material. Several composite configurations three sizes and five-weight ratios (from 0.5% to 2.5%) fiber were prepared for mechanical thermo-physical characterization. Generally, natural are affected by alkali environment mortar. To overcome problem, treated NaOH solution 1% concentration enhance their resistance against chemical degradation....

Effects of surface chemical modifications luffa fibers on mechanical and hygrothermal behaviors polyester/luffa composites were studied. Unsaturated polyester resin was used as matrix. Untreated, alkali-treated, treated with combined process, acetylated used. Scanning electron microscopy infrared spectroscopy to characterize the morphology structure fibers. The properties characterized using three-point flexural bending test. Water absorption tests conducted both composite materials by...

The effect of chemical modification, reinforcement structure and fiber weight ratio on the flexural proprieties Luffa-polyester composites was studied. A unsaturated polyester matrix reinforced with a mat Luffa external wall fibers (ComLEMat), short fibers(ComLEBC) core fi-bers (ComLCBC) fabricated under various conditions treatments (combined process, acetylat-ing cyanoethylating) ratio. It resorts that acetylating cyanoethylating enhance strength modulus. influenced properties com-posites....

Although the abrasive water jet (AWJ) has proven to be a suitable process for machining composite materials, it some limitations related dimensional inaccuracy and surface defects. As performance of AWJ mainly depends on parameters, an optimal selection them is crucial achieving improved quality cut. In this context, present study reports experimental investigation assess influence parameters kerf taper angle (θ) roughness ( R ) E glass/Vinylester 411 resin laminates. The experiments are...

This research investigates the mechanical, morphological, and thermal properties of carbon fiber composites with Silicon Carbide (SiC) nanoparticles. Both were produced using Vacuum Bagging Molding (VBM) analyzed through numerical experimental methods, including tensile tests (ASTM D3039), ultrasonic three-point bending fatigue C1360), morphological examinations D1894). The steady-state analysis was conducted ANSYS. modified contained 2% 8% wt. SiC Results showed improvements in strength by...

Preisach model is widely used to characterize ferromagnetic material's hysteresis. Thus, it necessary identify its parameters in order complete magnetic hysteresis modeling successfully. In this paper, a stochastic identification method, Genetic algorithm, implemented. The procedure consists of the minimization error between measurements and program results. Obtained results are compared with classical nonlinear least square method experimental fully-process non oriented Fe-3 wt%Si steel sheet.

This paper presents an optimization of the mechanical properties cement– Posidonia composite by means experimental characterization. We are interested in producing cement reinforced raw fibers. The ratio fibers and water-to-cement mass is varied to determine its effect on composite, particularly, resistance fracture. Three point bending compression tests were carried out study composite. Scanning electron microscopy was used examine surface tested samples. investigation shows improvement...

Understanding the scratch behaviour of composite materials is primary importance. The glass fibre reinforced polyester was investigated. A new device designed and developed. Scratch tests at room temperature were carried out, using conical indenter constant scratching velocity. main aim this study to investigate effects tribological parameters on wear mechanisms friction coefficient. Particularly, normal load attack angle presented. different scenario material during test deduced, then...

Natural fibers are increasingly used in composites because of their low cost and good mechanical properties. Cement reinforced with natural fibersis contemplates as a new generation construction materials superior thermal performance. This study three sizes’effect Doum palm fiber explores the mortar’s behavior different ratio. The aim is to determine optimal addition improve properties cements. Physical, composite examined. Tensile verified potential material. Findings prove that use...

The twist angle is an important parameter of the yarn which determines degree and shape filament's deformation produced along their length. So, in this paper, a 3D numerical modelling filaments assemblies has been developed. behaviour multifilament was simulated using ABAQUS finite element package by yarns as continuum elements. distribution filament helix according to radial position evaluated. Results show that draws near zero axis but does not fall presence migration, becomes bigger are...

This work presents an experimental investigation of the post-fire flexural strength Filament-wound Glass Fiber Reinforced Polymer (GFRP) tubes manufactured by CTRA Company. These are assembled according to both NFT57-900 and DIN-16966 standards’ recommendations. To this end, tests have been carried out on butt-to-butt tubes, before after fire endurance tests. gain a better insight into fire-induced damage mechanisms, thermal analysis (DSC TGA), FTIR tests, as well Scanning Electron...