In vacuum assisted resin transfer molding (VARTM) process, fiber preform defects result very often from inappropriate placement at edge regions when the fiber preform has three-dimensional shape. The unintentional permeability variation is difficult to detect by viewing through the transparent vacuum bag. In this paper, a method was proposed for detecting the local permeability variation of the...

The unique sensing features of the tilted Fibre Bragg Grating (TFBG) as a single three-parameter optical sensor are demonstrated in this work, to monitor manufacturing process composite materials produced using Vacuum Assisted Resin Transfer Moulding (VARTM) process. Each TFBG can measure simultaneously and separately strain, temperature refractive index (RI) material where fibre is embedded. A...

Natural fibres have recently become an attractive alternative to synthetic in the implementation of polymer composite structures. Inherent flaws within natural terms their constituent contents (hemicellulose, cellulose, and lignin) reduce compatibility these with matrices. In this study, effects chemical treatments on hemp resulted polyester matrix are investigated. The were treated alkali (0–1...

In order to avoid the instability of composite materials laminated tube connection between layer and layer, with green basalt fiber as raw material, through reasonable design, special-shaped 3D (three-dimensional) tubular woven fabrics two different thicknesses shapes were fabricated on a semi-automatic sample loom low cost. The composites by VARTM (vacuum assisted resin transfer molding) proce...

In the present study experimental and numerical investigations were carried out to predict the low velocity impact response of four symmetric configurations: 10 ply E Glass, 10 ply AS4 Carbon, and two Hybrid combinations with 1 and 2 outer plies of E Glass and 8 and 6 inner plies of Carbon. All numerical investigations were performed using commercial finite element software, LS-DYNA. The test c...

Software-based mold flow analysis is often performed to confirm optimized resin pipe arrangements. In this study, the GeoDict software and reverse scanning were employed develop a method for performing rapid porosity permeability estimation. A comparison of results from one-dimensional Easyperm tests revealed 10% variation in parameters obtained through proposed estimation method. addition, sub...