Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Carbon Fibers


Design of Prosthetic Foot from Polymer Materials Reinforced by Carbon Fibers

Jawad Kadhim Oleiwi; Ahmed Namah Hadi

Engineering and Technology Journal, 2016, Volume 34, Issue 9, Pages 1744-1754

Loss of the lower limb can cause loss of mobility.At all places and at all times, efforts have always been made to make up for such a loss.In this work polymer composite materialshad been used to manufacture prosthetic foot. Polymer composite materialsPMMA:SR/PURreinforced by carbon fibers (CF) were prepared as suitable material for prosthetic foot then, tensile characteristics were measured and determined. Numerical work included Finite element method (ANSYS-15) was used to analyze and evaluate deformation, stress and strain characteristics of a new designed prosthetic foot, which was treated as three-dimensional structure composite polymer material. The experimental and theoretical results were improvedthat polymer composite material can be used for this application

Mechanism of Hybrid Reinforcement and its Effect on some Properties of Binary Polymer Blend

Awham M. Hameed; Entihaa G. Daway

Engineering and Technology Journal, 2014, Volume 32, Issue 2, Pages 287-301

The aim of current study is carrying out some modifying in properties of resin material (Unsaturated polyester, UPE) by adding thermoplastic material (polystyrene, PS) with different weight ratios included (0%, 5%, 10%, 15% and 20%) of (PS) to prepare binary polymer blend.
The optimum ratio was selected in terms of the homogeneity case between the two polymers and studying the nature of the surfaces of the prepared materials using the optical microscope. Some mechanical tests were performed to determine the values of impact strength (I.S), ultimate tensile strength (UTS) for all prepared specimens.
The ratio (80/20, weight/weight)% of (UPE/PS) blend was selected and reinforced with fibers volume fraction Фf = 10% using three types of fibers included
(glass fibers (G.F), Carbon fibers (C.F) and hybrid from the two types (5% G.F and 5% C.F). All the above tests were repeated after the reinforcement for comparing the results and studying the behavior of materials under work. The results exhibited that the values of (I.S) increase with increasing of the blending ratio of (PS) while the values of (UTS) decrease at blending ratios (10, 15) % of (PS) and return to increase at the ratio 20% . After the reinforcement, it was found that the composite reinforced with carbon fibers records the highest values of impact strength for un notch specimens while the hybrid composite has the highest value of the ultimate tensile strength comparing with E-glass and carbon fibers composites.

Effect of Filler Type on some Physical and Mechanical Proparties of Carbon Fibers / Polyester Composites

Osama Sultan Muhammed; Abbas Khammas Hussein; Ruaa Haitham Abdel-Rahim

Engineering and Technology Journal, 2013, Volume 31, Issue 15, Pages 2905-2924

In the present study, traditional and hybrid composites were prepared by Hand lay-up
molding and investigated. The composites constituents were unsaturated polyester resin
as the matrix, 3% and 6% volume fractions of carbon fibers as reinforcement and 3% of
Al2O3, Al, Cement and local Gypsum (calcium sulfate anhydrate CaSO4) as filler
particles. The investigated physical properties were density, porosity while the
mechanical properties were tensile properties, bending modulus of elasticity. The
experimental results showed that increased volume fraction of carbon fibers to (6%) led
to increase in physical properties (density, porosity. As for the mechanical properties,
carbon fiber composites and (3% carbon fibers/Al2O3)-contained hybrid composites gave
the higher tensile and fracture strength, carbon fiber then gypsum composites gave the
higher bending modulus.

Numerical and Experimental Analysis of the Bending Deflection of the Composite Beam

Mena Faisal Khdeer

Engineering and Technology Journal, 2013, Volume 31, Issue 3, Pages 563-572

This work studies the numerical and experimental bending deflection of 3-point test of the composite beam made of epoxy reinforced by glass fibers and carbon fibers at different volume fractions .The results show that the deflection decrease in nonlinear relationship with increase volume fraction for both glass fibers and carbon fibers .The maximum difference between the experimental results and the finite element results difference was (11 %) at load (=20 N) and fibers volume fraction (Vf= 10 %) for glass fibers reinforcement. Also the results indicated that the maximum deflection was (1.65mm) when reinforced by glass fibers at (Vf =10 %) and at load (= 20 N) experimentally, while the maximum value of deflection was (0.55mm) when reinforced at the same load and fibers volume fraction.