(2002) Numerical and experimental studies on the fracture behavior of rubber-toughened epoxy in bulk specimen and laminated composites. ABSTRACT To study the toughening mechanisms of liquid rubber (LR) and core-shell rubber (CSR) in bulk epoxy and composite laminate, experimental and numerical investigations were carried out on compact tension (CT) and double-cantilever-beam (DCB) specimens und...

Reinforcement of both fibrous and particulate materials can improve composite properties for various applications, such as biomedical applications. The alkali-treated kenaf fibers (SiO2, bentonite, CaCO3) microparticles 400 mesh in size reinforce the epoxy matrix hybrid composites. bending impact composites, well their water absorption, are compared. composites were prepared a compression mold ...

In this paper, composite and hybrid materials were prepared using the hand lay-up method, with carbon, glass, Kevlar fabrics as reinforcing epoxy a matrix. The tensile test was performed to determine optimal ratio of resin in carbon fabric/epoxy, glass fabric/epoxy composites terms properties. It found that properties impregnate used fabric, fabric around 45%wt, 3%wt, 30 %wt, respectively. effe...

Unmanned Aerial Vehicles (UAVs) have high popularity, especially in the military field, but are now also being applied to private and public sectors. One of UAV components that require material technology is wing. The latest developed as a for unmanned aircraft wings composite has strength lightweight. This research aims identify materials can be used wing structures. method this qualitative wi...

in this paper a new method for nondestructive testing or nondestructive evaluation is proposed for glass-epoxy composite. for this purpose, impact-echo is used to evaluate the properties of composite materials, detecting internal defects and thickness measurement. in the impact-echo method a steel ball impacts on a composite plate and generates stress waves or p-waves which will be transferred ...

Abstract The aerospace industry requires materials showing good mechanical performance, durability, and thermal stability to satisfy very stringent requirements in several applications. Epoxy-based composites can be a suitable solution, due the peculiar characteristics of polymer matrix. Epoxy resins cured by aliphatic or aromatic hardeners. use amines is preferable because their lower toxicity...

Abstract In this study, epoxy hybrid nanocomposites reinforced by carbon fibers (CFs) were fabricated a filament winding. To improve out-of-plane (transverse) mechanical properties, 0.5 and 1.0 Wt.% multi-walled nanotubes (MWCNTs) embedded into epoxy/CF composites. The MWCNTs well dispersed the resin without using any additives. transverse properties of epoxy/MWCNT/CF evaluated tensile test in ...

A new type of phosphonium ionic liquid (trihexyl (tetradecyl) bis(2,4,4-trimethylpentyl) phosphinate core/silica shell microcapsules ([email protected]2) was successfully synthesized by one pot sol-gel process in IL/H2O emulsion and combined to epoxy amine networks as reinforcing fillers. Different amounts [email protected]2microcapsules epoxy-to- stoichiometric ratios were considered order inv...