AbdulKareem Hassan
@uobasrah.edu.iq
Mechanical Engg. Department - College og Engineering
University of Basra
RESEARCH INTERESTS
materials Engineering
metal forming
Fracture mechanics
Composite Materials
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Jaafar Sh. AbdulRazaq, Abdul Kareem F. Hassan, and Nuha H. Jasim
American Institute of Mathematical Sciences (AIMS)
<abstract> <p>A functionally graded material (FGM) was prepared using epoxy resin reinforced with silicon dioxide with a particle size of 100 μm and weight percentages of 0, 20, 40, 60, and 80 wt%. In a gravity-molding process using the hand layup technique, specimens with international standard (ASTM)-calculated dimensions were created in a mold of poly(methyl methacrylate), which is also known as acrylic. Tensile, flexural, impact, infrared wave, and thermal conductivity tests, and X-ray diffraction (XRD) were conducted on specimens of the five layers of the FGM. The XRD and infrared spectroscopy demonstrated that the compositions of the silica particles and epoxy had a strong association with their physical structures. The findings of experimental tests indicated that increasing the ratio of silicon dioxide enhanced the mechanical properties, and the increase in modulus of elasticity was directly related to the weight percentage of the reinforcement material. The composite with 80% silica had a 526.88% higher modulus of elasticity than the pure epoxy specimen. Both tensile and flexural strengths of the composite material were maximal when 40 wt% of the particle silicon dioxide was utilized, which were 68.5% and 67.8% higher than those of the neat epoxy, respectively. The test results also revealed that the impact resistance of the FGM increased when the silica proportion increased, with a maximum value of 60 wt% silica particle content, which was an increase of 76.98% compared to pure epoxy. In addition, the thermal properties of epoxy resin improved when SiO<sub>2</sub> was added to the mixture. Thus, the addition of silica filler to composite materials directly proportionally increased their thermal conductivity to the weight ratio of the reinforcement material, which was 32.68–383.66%. FGM composed of up to 80% silica particles had the highest thermal conductivity.</p> </abstract>
Ali Abduljabbar, Haider Khazal, and Abdul Kareem F. Hassan
International University of Sarajevo
Repair of cracked pipeline under internal pressure has been investigated in the present study. To this aim, an experimental test has been done on the cracked pipeline to find failure pressure. A longitudinal crack that cut 65% thickness of pipe has been applied on the external surface. Carbon fiber reinforced polymer has been used to repair the system. Additionally, a finite element model has been developed to estimate failure pressure of the unrepaired pipes. The results show that the failure pressure in unrepaired pipes is identical to the failure pressure predicted by the standards for corroded pipes, however, the failure pressure of repaired system is lower than the predicted results of standard for corroded pipelines.
Amjed M. Kadhim, Abdulkareem F. Hassan, and Qais Abdulhassan Rishack
AIP Publishing
Hayder Kareem Talla, Abdul Kareem F. Hassan, and Jawad Kadhim Oleiwi
International Information and Engineering Technology Association
Due to their qualities and advantages, such as light weight, high rigidity, and high performance, composite materials have been used in a wide variety of industries and sectors. For example, carbon fibres are used in the construction of aircraft, while ultrahigh-molecular-weight polyethylene (UHMWPE) is used in the fabrication of medical artificial joints. In this study, the blade dimensions were estimated using side profiles from a European patent specification and the mechanical properties of numerous layers of composite materials (UHMWPE, carbon, glass fibre, and Perlon) utilized in the fabrication of sports prosthesis were investigated experimentally, theoretically, and numerically, and the results were compared, as well as the theory of failure calculated. The influence of data entered into the ANSYS programme was also investigated in the case of isotropic or orthotropic materials. The findings indicate that longitudinal young modules are experimentally and theoretically equivalent. While the material ISO or Ortho is considered and its information is entered into the ANSYS programme for the same lamina, similar results are obtained under the same boundary condition, as was demonstrated when computing the theory of failure. Additionally, it was demonstrated in this research that layering woven carbon fibre on top of layers of UHMWPE woven fabrics had a greater effect than layering woven glass fibre when fabricating the sports prosthetic foot.
Ahmed M. Abood, , Haider Khazal, and Abdulkareem F. Hassan
American Institute of Mathematical Sciences (AIMS)
<abstract> <p>In this study, fracture parameters of epoxy/glass functionally graded composite were determined experimentally using the digital image correlation (DIC) method. A functionally graded material (FGM) with continuous variation in elastic properties was manufactured by gravity casting in vertical template. A 30% volume fraction of glass spheres was dispersed in a low viscosity resin. A single edge crack specimen was examined in a three-point bending test under mode Ⅰ loading with cracks along the gradient tendency of the material properties. The mechanical properties of FGM were calculated according to ASTM D638. The DIC technique was adopted to obtain the deformation region around the crack tip. William's series was employed to calculate stress intensity factor and T-stress. The experimental results then verified by solving the FE model using ABAQUS program. The comparison between DIC and numerical results illustrated a largely acceptable achievement.</p> </abstract>
Ahmed M. Abood, Haider Khazal, and Abdulkareem F. Hassan
Elsevier BV
Wafaa Farouq, Haider Khazal, and Abdul Kareem F. Hassan
Elsevier BV
Hayder Kareem Talla, Jawad Kadhim Oleiwi, and Abdul Kareem F. Hassan
International Information and Engineering Technology Association
Prosthetic upgrades are specialized prosthetics that enable patients to participate in more demanding recreational activities, such as running. This study examines the use of prosthetic limbs, specifically the athletic prosthetic foot. The current research focused on the manufacturing and production properties of an samples athletic prosthetic Foot made from composite materials based on a polymethyl methacrylate resin (PMMA) reinforced with various fibers (UHMWPE, Perlon, Carbon fiber, and Glass fiber). The finite element method (ANSYS-19R) is used to build an athletic prosthetic model and apply boundary conditions to investigate the influence of deformation and stored energy on the performance of the sports prosthetic foot. Six laminates have been manufactured, and it has been discovered that adding a number of carbon fiber layers to UHMWPE has a better effect on deformation than adding a glass fiber 26% improvement. Furthermore, the findings show there is an improvement in performance when the number of classes was doubled, as the rate of improvement between the laminate to which carbon fibers were added was 31%, and between the laminate to which glass fibers were added by 32% under the same boundary conditions.
Wafaa Farouq, Haider Khazal, and Abdul Kareem F. Hassan
Elsevier BV
Abstract This work aims to experimentally investigate the mechanical properties and fracture analysis of a functionally graded material (FGM) made from sphere glass and epoxy resin composites using a hand lay-up process. The stress intensity factor is determined by the digital image correlation (DIC) technique for the compact tension specimen. The results of the DIC technique are compared using the meshless extended element-free Galerkin method. The applicability of the experimental method is demonstrated for a five-layered epoxy/glass FGM with layers ranging from pure epoxy to 60% glass–40% epoxy in the glass-rich side. The relevant results obtained from the experimental work agreed well with those of the numerical method. This study is important for researchers to address the unavailability of an explicit code and standard in the hand lay-up process and conforming specifications of the fracture mechanism of FGMs.
Haider Khazal, Abdul Kareem F. Hassan, Wafaa Farouq, and Hamid Bayesteh
ASTM International
This research reports the computation of the fracture parameters, namely T-stress and stress intensity factors of a stepwise functionally graded material (FGM) by using the digital image correlation technique. A five-layer epoxy/glass FGM with layers varying from pure epoxy to 60 % glass/40 % epoxy was investigated. The effects of the crack-tip positions and crack length on the nonsingular terms were analyzed. In addition, the numerical simulation of the layered FGM was investigated to further evaluate the fracture parameters. The numerical and experimental model results were compared, and good agreement was obtained between the experimental and numerical tests. Accordingly, the numerical models developed with the corresponding material properties can be used for the evaluation of fracture parameters of the developed FGM.
Abdul Kareem F. Hassan, Luay Sadiq Mohammed, and Husam Jawad Abdulsamad
Springer Science and Business Media LLC
This study includes an experimental investigation for rotating bending fatigue in five types of composite material shaft with comparison to a standard type made of pure polyester material. In addition, an artificial neural network ANN prediction is compared with experimental part. The five types vary according to the type of glass fiber fabric (thin and thick fiber fabric) and fiber volume fraction (10.2 and 14.6% for thin fibers, and 14.6, 29.3 and 43.9% for thick fibers). Tensile tests are performed to identify the range of applied fatigue stress for every type. Specimens weight is measured in order to calculate the ratio of strength to weight. The rotating bending fatigue tests are performed to record the fatigue behavior for each type. Results show that the type with (29.3%) volume fraction of thick fiber has the maximum tensile strength to weight ratio with (290%) improvement compared with the standard type. The best fatigue behavior is for type with (14.6%) volume fraction of thin glass fibers. This type has the maximum value of fatigue stress at life limit of (106 cycles) with (362%) improvement compared with the standard type. Then, the types with (29.3%) and (43.9%) volume fractions of thick glass fibers make (356%) and (331%) improvement of fatigue stress, respectively. The ANN gives satisfactory results and it is a good prediction tool for fatigue life of composite materials.
Osama A. Abdullah and Abdul Kareem F. Hassan
Springer Science and Business Media LLC
The effect of fiber prestressing has been investigated on the tensile strength, modulus strength, flexural properties and residual stresses of Carbon fiber reinforced polymer (CFRP) composites. Unidirectional carbon fiber in an epoxy resin has been examined under different prestressing levels (0, 5, 10, 15, 20, 30, 45, 60, 80 MPa) at ambient temperature and 50 % fiber volume fraction. A new method was implemented to produce the prestressed laminates for several standard tests. The results showed that prestressing on 3-ply unidirectional carbon fibers improved the fiber tensile strength to 99 % and the tensile modulus to 31 %. Similarly on 8-ply unidirectional carbon fibers has improved the fiber flexural strength to 63 % and flexural modulus to 81 %. A new technique was used to measure the residual stresses and tensile modulus of the composite laminate by recording the final extension and the remaining load directly after the curing process and releasing the applied load.