Mohsin Abdullah Al-Shammari

University of Baghdad · Department of Mechanical eng.

Most below-knee prostheses are manufactured in Iraq without considering the fast progress in smart prostheses, which can offer movements in the desired directions according to the type of control system designed for this purpose. The proposed design appears to have the advantages of simplicity, affordability, better load distribution, suitability f...

The most important way for joining the non-welding aluminum alloy is Friction stir spot welding. Three parameters effect on efficiency of welding: tool shape, rotational speed, and plunged time, are chosen to study for welding 6061T6 aluminum alloy. Each of the above parameters has three variables as: pin shapes (square, cylinder, and hexagonal), p...

The computerized prosthetic knee joints equipped with advanced embedded systems that enable control of lower limb movements for amputees using hardware and software components. The hardware of the embedded system represents each of the actuators, sensors, and microcontrollers while the software uses algorithms of artificial intelligence that contro...

Previous research presented the effect of nanomaterials on the mechanical properties of composite materials with various volume fraction effects; in addition, their research presented the effect of nanomaterials on the same mechanical characteristics for a composite plate structure, such as vibration and thermal buckling behavior. Therefore, since...

The standard prosthetic pylon is commonly manufactured of lightweight metals such as aluminium. In this study, two types of pylons were manufactured. The first pylon (I) was made with one suggested combination, which consists of layers of 2 perlon, 3 carbon fibre, and 2 perlon, while the other pylon (II)was made with a second suggested combination,...

As it is known, aluminium-coper alloys are used for many applications of our life, such as within the aeronautic industry, which only further emphasises the necessity of improving and better understanding alloys' mechanical properties. This can be seen when adding nickel changes the alloy's mechanical characteristics significantly for copper alloys...

Due to the increasing demand and urgent need for prosthetic limbs for amputees, especially prosthetic feet, it has become necessary to expand the design and use of composite materials in the production of prosthetic feet to meet the needs of amputees, providing comfort and ease of use. In this work, a new dynamic prosthetic foot with the ability to...

The present paper deals with the influence of the circular aperture located at the center, and the cracks arise from its circumference on the free vibration characteristics of a rectangular plate. The work has been conducted experimentally and numerically. The presence of holes and cracks in a rectangular plate significantly changes the structure’s...

Purpose: In this study, the free vibration analysis of functionally graded materials (FGMs) sandwich beams having different core metals and thicknesses is considered. The variation of material through the thickness of functionally graded beams follows the power-law distribution. The displacement field is based on the classical beam theory. The wide...

Modifying buckling behavior of the composite structure has been investigated in the recent few years with different reinforcement fiber and powder materials and nanomaterials. It can be seen from previous studies that the addition of nanomaterials leads to a significant modification in the buckling behavior of structure by using a low mount of nano...

Friction stir welding (FSW) has many advantages when compared with another fusion welding. The experimental analysis and optimization of friction stir welding (FSW) were done to obtain desired mechanical properties of dissimilar aluminum welded plates (2024T3 and 7075T6). The friction stir welding process was done on aluminum plates (2024T3 and 707...

A prosthetic pylon is a part of an artificial lower limb, which is a very interesting area of biomedical engineering today. The research aims to show the hung innovations and developments of new suggested composite material, to modify the prosthetic pylon (which is generally made of lightweight metal such as aluminum, titanium, stainless steel, or...

In the authors’ previous work, various mechanical properties such as modulus of elasticity, strength, creep, impact and fatigue behaviours for different laminates composites with and without different Nano-material additions and reinforcements with different types of fibres were tested experimentally. The four best lamination types and suitable Nan...

Friction stir welding (FSW) is a complex process that needs and trial to reach the optimal properties. In This work deals theoretical consideration done by two ways; first way is conventional Particle Swarm Optimization (PSO) and the second method is new modified Particle Swarm Optimization. The Friction stir welding data were taken from recent stu...

Shell structures are liable to different kinds of defects and damage like cracking and corrosion which may destroy their structural safety and affect the service life. The cracks' effects are significant considerations in the design of cylindrical shell structures as they influence the vibration characteristics and safety. This present work is an e...

The fatigue behavior of removable partial denture is very important parameter so that it must be invested, since, it is part of human body exposed to a variable load with time, then, lead to a failure due to dynamic load. So, it was necessary to modify the dynamic characterization for biomaterials used for manufacturing this part. The aim of this w...

Free vibration characteristics of a cylindrical shell of finite length containing a partial peripheral crack are studied. An analytical solution method is proposed to evaluate the natural frequency of the cracked cylindrical shell structures. The governing equations of motion are based on classical shell theory and are simplified by Love's theory....

Epoxy-polysulfide copolymer has a remarkable flexibility and resists many chemicals such as water, fuels, hydrocarbons and hydraulic fluids. Because of the need to enhance mechanical properties of this copolymer ,the addition of Alumina powder was performed. This action has enhanced engineering properties, such as tensile strength, stiffness, wear...

Aluminum metal matrix composites (AMCs) are advanced engineering metal that used for many applications. In this work AMCs consist of aluminum 7075 and silicon carbide (SiC) were manufactured by stir casting for different weight ratio. AMCs were tested to find mechanical and physical properties such as young modulus, ultimate stress, maximum elongat...

The research used analytical and numerical methods to test thermal buckling activity for a composite plate structure with a range of Nano fractions. Experimental program with mechanical properties for the Nano composites were carried out and have been validated from previous work. In addition, both mechanical and thermal expansions were tested from...

This work includes analysis and experimental studies of the temperature effect on high-cycle fatigue behavior of the steel beam coated with nanoparticles. The beams are made from AISI-1020 (low carbon steel). The nano-materials used are zinc oxides (ZnO) and aluminum (Al2O3). The coated technique is used to achieve nano coating, and the thickness o...

This study proposes an analytical solution method for investigating vibrational characteristics for a tubular cylindrical shell of a finite-length and bares a circumferential part-through fissure. The effect of different parameters i,e, length, depth and the fissure's location, on the vibrational characteristics, were also investigated. The equatio...

The gas turbine rotors are subjected to different types and directions of loading like axial, bending, shear and thermal loading. This loading is changed periodically during the operation which can lead to crack initiation in the rotor shaft. When these cracks propagate to the extreme limit, it will lead to sudden failure of the shaft rotor. Crack...

Vibration analysis plays an important role in the dynamics of rotors, which can be afflicted by unbalancing forces that, over the long term, can lead to the initiation and growth of cracks at the rotor shaft. To predict cracking, it is necessary to study the vibration parameters of the rotor and existence of expected cracks. In this study, rotor vi...

This paper investigates the effect of heat treatment on the mechanical properties (yield and ultimate strength, elongation, hardness, and modulus of elasticity) and dynamic characteristics (natural frequency and dynamic response) under impulse loading for 6061 and 2024 aluminum alloys in O, T4, and T6 treatment conditions to study the effect of hea...

Wear of total hip prosthesis is a significant clinical problem that nowadays involves a growing number of patients. To acquire further knowledge on the tribological phenomena that involve hip prosthesis, wear tests must be done on new biomaterials to increase life of orthopaedic implants, the average serviceability of an artificial hip joint is aro...

Artificial Hip Joints is a complicated field as it is related to material wear rate, biocoMPatibility and stability. While these factors might seem enough, but more factors are affecting implant performance such as hip joint design. This theoretical work is performed by ANSYS 18.2 software to simulate a force of 3000 N load applied on a design for...

Using of new techniques for lowering the cost of Prostheses

It is about analysis of tensors

This research study's the fatigue behaviour of friction stir welded (FSW) and friction stir processed (FSP) joints for joining AA5083-H111 aluminium alloy. The Joining has been implemented on 3mm thickness. Fatigue properties of the welded joints were evaluated based on the superior tensile properties for FSW at 1500 rpm and a feeding speed of 20 m...

In this study, several models of the rocket fins were made of hyper composite materials (with two or more reinforced materials) with different volume fractions of components used to produce isotropic composite plate structures. The reinforcement of polyester resin material was done in two ways, with fibre reinforcement and powder reinforcement. The...

The study investigates the natural frequency of sandwich plates made from stainless steel and Teflon with crack effect. The fundamental natural frequencies are analyzed experimentally by impact hammer and numerically by ANSYS 15. The aim of the experimental investigation is the fabrication of the sandwich plate made from (stainless steel/ Teflon/st...

Researchers have studied the effect of reinforced powder on the behavior and properties of a composite materials structure. These investigations included the effects of reinforcement by fiber and powder materials. This work studies and investigates experimentally the effect of various types of powder materials and volume fraction on the buckling pl...

A finite element model of Syme’s socket was built to investigate the influences of parameters alterations on the weight of socket and stiffness to weight ratio under general loading. For the prosthetic studies, it is known that the weight of the socket is one of the important features to consider during the assessment of the Syme’s prosthesis. To a...

Fiber reinforced plastics (FRP) have been widely used as one of the most interesting materials for structural engineering applications due to their excellent mechanical and physical characteristics for example, high specific strength and high specific stiffness. One of the most successful applications of FRP is the fabrication of prosthetic socket...

The applications of honeycomb structure plate are very important, since its structure have high strength in addition to the low weight. Therefore, these structures are used in the multi-important application, where, more its application is applied to buckling load in addition to other loads. Thus, it was necessary to highlight the buckling behavior...

Four types of laminated composite materials are tested experimentally in order to estimate the fatigue characteristics and investigation of the mechanical properties for a manufactured symes prosthetic socket. The socket is made of lamination 80:20 matrix reinforced by four types of reinforcement fibers; the first type includes (4perlon, 3carbon fi...

Friction Stir Welding is one of the most practical welding process at the solid state. Friction Stir Processing is used to enhance the microstructure of FSW welded zone. The present study investigates the effect of welding parameters on the tensile properties of FSW and FSP joining 3 mm AA 5083-H111 aluminum alloy by means of stress-strain curve wi...

In this work, the fatigue strength of the Syme’s prosthetic socket is investigated numerically and theoretically with the aim of knowing the resistance of the proposed material of the Syme’s socket to the repeated loads that occurring during locomotion of amputee. One proposed laminate for manufacturing the Syme’s prosthetic socket used 4-layers of...

A finite element model of Syme’s socket was built to investigate the influences of parameters alterations on the weight of socket and stiffness to weight ratio under general loading. For the prosthetic studies, it is known that the weight of the socket is one of the important features to consider during the assessment of the Syme’s prosthesis. To a...

Abstract— A prosthesis is a part fabricated in order to replace a body part, missed due to some trauma or congenital defect. People with through knee amputation (TKA) are prone to have their socket failed under different conditions. In this work, composite materials are suggested in order to modify the prosthetic socket and extend its life of and i...

In this work; the reinforcement of polyester resin material is conducted with two types, fiber reinforcement and powder reinforcement to produce an isotropic hyper composite materials composed of polyester resin, carbon powder and carbon or glass fibers with different volume fractions. Several tests were achieved to evaluate the mechanical and ther...

The formability of 3-mm-thick aluminum-alloy 5083-H111was studied by using friction stir processing (FSP) and friction stir welding (FSW) with studying the effect of two parameters, first one rotational speed having 1000, 1500 and 2000 rpm and the second is welding speed of 20, 40 and 60 mm/min. The formability was studied by three-point bending te...

In this study eleven models of the rocket fins were made of hyper composite material with different values of volume fraction of components (70%, 60%,50% for polyester, 40%, 30%,25%,20%,10% for fibers and 0%, 5%, 10%, 20%, 30%,40%for powder) to produce an isotropic composite plate structure. The reinforcement of the matrix is done by mixing of the...

The experimental and numerical investigations of free vibration study of composite skew plate are done. The free vibration characteristics are determined numerically using ANSYS package. A comparison between these investigations is done also. The effects of the skew angle, thickness of plate, central hole shape, and a percentage of hole area to the...

The main goal of this study is the selection of the best rubber reinforced with carbon black fillers stock to resist the tension, tear and crack growth due to cyclic stresses. The mechanical properties of this rubber is determined, the test specimens are prepared and manufactured in Babylon Tires Factory locate in Al-Najaf Al-Ashraf city in Iraq. I...

In this research, a free vibration of unidirectional composite laminated plate with different holes shape effect investigation is done experimentally and numerically. The natural frequency and deflection response of a unidirectional composite plate are studied with different holes shape effect as (rectangular or triangular or square or ellipse or c...

In this research the reinforcement of the resin materials is done with two type's , as powder reinforcement and unidirectional or woven reinforcement fiber to produce an orthotropic hyper composite materials composed of three materials, resin materials and two reinforcement fibers (powder and unidirectional or woven fiber). The composite structure...

Creep testing is an important part of the characterization of composite materials. It is crucial to determine long-term deflection levels and time-to-failure for these advanced materials. The work is carried out to investigate creep behavior on isotropic composite columns. Isotropy property was obtained by making a new type of composite made from a...

In this work, the effect of variation of semi-angle of the conical part on the vibration characteristics of cylindrical-conical coupled structure is investigated. The shell is made of polyester resin reinforced by continuous E-glass fibers. The case is analyzed experimentally and numerically for orthotropic shell structures. The experimental progra...

Abstract The dynamic stresses and deformations of turbo machinery blades are dealt in this paper. The inite element method has been employed using the superparameric parabolic shell as a discretization element. Starting from total strain and total kinetic energies of the rotating structure and using Lagrange’s equation, equations of motion of a di...

In the present study, the effect of number of geometry variables, such as semi-cone angle, shell thickness, and fiber orientation on the linear vibrational response of a coupled cone – cylinder shell structure, is experimentally and numerically presented. The shell is made of polyester resin reinforced by low quantity of continuous and chopped type...