Jumaa Salman Chiad

Jumaa Salman Chiad
Al-Nahrain University · Department of Prosthetic and Orthotic Engineering

PhD in Mechanical Engineering /Applied Mechanics

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52
Publications
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358
Citations

Publications

Publications (52)
Article
The commercially available and research-developed positive-type ankle joints do not provide eversion and inversion movements and are limited to dorsiflexion and plantar-flexion. The aim of the research is to create an ankle joint that is simple to install, low in cost and closes in performance to the biological joint. The passive ankle joint is des...
Article
One form of energy storage in spring is applying a bending moment and converting it into tilt at the head of the spring as strain energy. The relationship between them is the lateral stiffness of the spring. The aim is to find a mathematical equation for the lateral stiffness of the spring and the effect of the length of the spring on the behavior...
Conference Paper
Full-text available
Using lower extremity exoskeletons in the healthcare field like for rehabilitation is a substantial application. Lower limb exoskeletons can help in performing specific functions like gait assistance, and physical therapy support for patients who are lost their ability to walk again. The ground reaction force characteristics during human walking ca...
Article
Abstract The spring is an important mechanical part of which widely used in many industrial applications. There is an urgent need to know its stiffness property before use in any application. Since the stiffness varies according to the method of using the spring in this research, it is suggested to calculate the lateral stiffness of spring by the m...
Article
Full-text available
Using lower limb exoskeletons in healthcare sector like for rehabilitation is an important application. Lower limb exoskeletons can help in performing specific functions like gait assistance, and physical therapy support for patients who are lost their ability to walk again. Since active lower limb exoskeletons require more complicated control inst...
Article
Full-text available
The use of lower extremity exoskeletons for gait rehabilitation purposes is a substantial application. The continuous need of precise and systematic training systems during lower extremity rehabilitation process led researchers to propose and develop strong, lightweight, low power consumption passive and quasi-passive exoskeletons as mobility assis...
Article
The main objects of this paper are to deal with the new technology of metal sheet forming using the incremental single-point tool to form the sheet metal. However, due to the needed long time to form the metal in incremental so that we used punching and then incremental forming to geometry the final shape of the product. By measuring the thickness...
Article
In this process, optimum laminating properties were used in producing prosthesis and orthoses were researched and selected based on high yield, ultimate stresses, stresses of bending and fatigue properties. The process of the optimal selection is the Response Surface Methodology (RSM), which has been used to reach two parameters: reinforcement perl...
Article
Full-text available
In this paper, human gait cycle dynamics analysis and a mathematical model of gait cycle is presented for determining the torque of the lower limb joints during complete gait cycle and its various phases. A healthy subject was participated in series of initial walking experiments. The experimental setup consists of a force plate and a video recordi...
Article
Full-text available
In this process, optimum laminating properties were used in producing prosthesis and orthoses were researched and selected based on high yield, ultimate stresses, stresses of bending and fatigue properties. The process of the optimal selection is the Response Surface Methodology (RSM), which has been used to reach two parameters: reinforcement perl...
Article
Full-text available
The prosthetic knee is one of the most important parts used in manufacturing of the above knee prostheses limb and it is considered the most important component. Accordingly, it became necessary to conduct a study and evaluate for different types a prosthetic knee. In present work, the mechanism of four bar 3R20 prosthetic knee were evaluated and s...
Article
Full-text available
Abstract. When a transfemoral amputee missing his knee joint, a polycentric mechanism is used as technical substitute to restore the gait function. The motion ability of transfemoral amputee is dependent on the performance of prosthetic knee. Recent results on the kinematic analysis of fourbar polycentric knee mechanism are reviewed in this article...
Article
Full-text available
The effects of shot peening treatment (SPT) were studied at (10,20, and 30) minutes on the rotating bending fatigue behavior and the behavior of the alloy steel DIN 41Cr4 vibrations. The hardness test, tensile test, constant amplitude fatigue tests, and the vibration measurements were performed on samples with and without cracks at room temperature...
Article
Full-text available
Four prosthetic knee joints (polycentric knee weight activating-4bar and friction, extension assist controlled),(single axis knee weight activating and friction, internal extension assist controlled), (single axis knee weight activating-4bar and hydraulically, controlled) and (polycentric knee geometric locking-6bar, hydraulically controlled) for a...
Article
Full-text available
This study deals with evaluation of smart economic transfemral Prosthetic consist of a new design and manufacturing of knee joint and design and manufacture of a simple electronic circuit that is programmed to control the muscle pressure on the sensor during movement and transfer the voltage of force sensor after processing in microcontroller to th...
Article
Full-text available
The effects of the ultrasonic peening treatment (UPT) on the rotating bending fatigue behavior and the behavior of the vibrations of alloy steel DIN 41Cr4 were studied. Hardness test, Tensile test, Constant amplitude fatigue tests, and the vibrations measurements have been carried out on the specimens. Also, the fracture surface was examined and an...
Article
Full-text available
There are many patients who face a lot of things that hurt the knee joint. Knee replacement is the best solution to these problems. This research was based on reducing the vibrations of daily activities as measured by the frequency of foot and knee for the patient for three cases when the bare foot, sports shoes with ground air and sports shoes wit...
Article
Full-text available
A well-designed lower limb prosthesis is necessary in order to permit an amputee to repeat to healthy locomotion. The aim of this study is to enhance the passive prosthesis to a microcontroller-based transfemoral prosthesis which was unable to reach the designated rotational speed intended for a functional use, and had low cost. The enhancement foc...
Research
Full-text available
The failure of a knee joint can cause serious health problems and usually leads to the replacement of the joint surgically. The distribution of stresses in the region of the joint shall be computed and analysed via photo-elasticity method and numerically with the use of ANSYS workbench. Numerical stresses will be measured and estimated for ground,...
Article
Full-text available
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...
Article
Full-text available
This paper discusses experimentally the effect of number and location of the dampers in the suspension system on the vibration displacement at rotation speed (1000, 1200, and 1400 RPM). In order to carry out this study, the KENWOOD type capacity 8 Kg washing machine was selected. The suspension system was tested for four cases according to the numb...
Article
Full-text available
In this work, the optimal mechanical properties of the lamination materials that used in manufacturing prosthesis and orthoses parts are studied. The optimization is selected according to high yield, ultimate stresses, bending stress and fatigue properties. The method of selection the optimal materials is a response surface methodology (RSM) which...
Article
Full-text available
In this work, the optimal mechanical properties of the lamination materials that used in manufacturing prosthesis and orthoses parts are studied. The optimization is selected according to high yield, ultimate stresses, bending stress and fatigue properties. The method of selection the optimal materials is a response surface methodology (RSM) which...
Article
Full-text available
The failure of a knee joint can cause serious health problems and usually leads to the replacement of the joint surgically. The distribution of stresses in the region of the joint shall be computed and analysed via photo-elasticity method and numerically with the use of ANSYS workbench. Numerical stresses will be measured and estimated for ground,...
Conference Paper
Full-text available
In this work, the selection of optimal mechanical properties for lamination materials that used in manufacturing of prosthesis and orthoses is studied. The optimization is performed according to high yield, ultimate stresses, bending stress and fatigue properties. The method of selecting optimum is response surface methodology (RSM) that entering t...
Conference Paper
Full-text available
In this work, studied and selected optimal mechanical properties of lamination materials used in manufacture prosthesis and orthoses according to high yield, ultimate stresses, bending stress and fatigue properties. The method of selected optimum is response surface methodology (RSM) that entered two parameter, reinforcement material perlon fiber a...
Article
Full-text available
The shot peening process used mainly to hardened the surface and increases the fatigue life of the rotating parts. This cold treatment will change the designed natural frequency of the part and change the vibration characteristics. Especially when this parts are driven by a high speed velocities. This research investigates the behavior of the vibra...
Article
Full-text available
The shot peening process used mainly to hardened the surface and increases the fatigue life of the rotating parts. This cold treatment will change the designed natural frequency of the part and change the vibration characteristics. Especially when this parts are driven by a high speed velocities. This research investigates the behavior of the vibra...
Article
Full-text available
At present use of glass fibers in lamination prosthetic socket, is due to its fiber strength and hardness, and low cost, but there are other more important things which must be considered than these specifications which are1the health1and safety. In this research fiberglass is replaced with monofilament fiber in order to be safe to on makers and us...
Presentation
Full-text available
Prosthetic and orthotics engineering is a Society’s perception to the special needs(Amputees and disabled)
Article
Full-text available
The hard workers are usually suffering from big medical problems after working with vibrating equipment such as compressor and different type of drills. These and many relative problems give a big motivation to study, measuring and analysis the vibration. The data were resulting from the vibration of
Article
Full-text available
In this work, hygrothermal effect on the mechanical and fatigue properties of prosthetic socket lamination and its effect on the bacteria growth were studied. Two laminations composite materials were used in manufacturing prosthetic socket by using vacuum device. The reinforced materials of these laminations were perlon and carbon nanopowder (CNP)...
Article
Full-text available
The hard workers are usually suffering from big medical problems after working with vibrating equipment such as compressor and different type of drills.These troubles give a big engorgement to study,measuring and analysis the vibration data resulting from the hard worker hand that is in touch with this vibrating equipment. This work studies the fre...
Article
Full-text available
The hard workers are usually suffering from big medical problems after working with vibrating equipment such as compressor and different type of drills.These troubles give a big engorgement to study,measuring and analysis the vibration data resulting from the hard worker hand that is in touch with this vibrating equipment. This work studies the fre...
Article
The older age people are usually suffering from big medical problems due to failure in hip joint, this lead to artificial hip replacement surgery. These troubles give a big engorgement to study, measure and analyze the vibration data and heart straining muscle with patient of replaced artificial hip joint in order to reduce the effect of vibration...
Article
Full-text available
The older age people are usually suffering from big medical problems due to failure in hip joint, this lead to artificial hip replacement surgery. These troubles give a big engorgement to study, measure and analyze the vibration data and heart straining muscle with patient of replaced artificial hip joint in order to reduce the effect of vibration...
Article
Full-text available
This work involved three parts ,the first one is manufacturing different types of laminated below knee prosthetic socket materials with different classical laminated materials used in Baghdad center for prosthetic and orthotic (4perlon layers+2carbon fiber layer+4 perlon layers) ,and suggested two laminated materials(3perlon layers+2carbon fiber la...
Article
Full-text available
The residual limb within the prosthesis, is often subjected to tensile or fatigue stress with varying temperatures. The fatigue stress and temperatures difference which faced by amputee during his daily activities will produces an environmental media for growth of fungi and bacteria in addition to the damage that occurs in the prosthesis which mini...
Conference Paper
Full-text available
Abstract Wars with its different causes and results introduce devastating tragedy to the warring peoples.One of the most horrendous devastating tragedy was the army of the amputees which was a natural result of any war .Iraq was one of these countries that faced the four devastating wars during the last fourteen years . finally Iraqi people faced...
Article
Full-text available
TThis paper deals with calculate stresses in Knee-Ankle-Foot-Orthosis as a result of the effect vibration during gait cycle for patient wearing KAFO .Experimental part included measurement interface pressure between KAFO and leg due to action muscles and body weigh on Orthosis. also measurement acceleration result from motion of defected leg by acc...
Conference Paper
Full-text available
A standard knee-ankle-foot orthosis (KAFO) is typically prescribed to support the limb during locomotion, during which (KAFO) is used for people with isolated quadriceps weakness or paralysis. In this paper the measurement applied on girl undergoing palsy children in her left leg as a case study. The first pathological concern is of age, weight, le...
Article
Full-text available
Within the prosthesis, the residual limb is often subjected to hot and moist environment which is uncomfortable and that may contribute to skin irritation, blistering, and reduces the quality of life, so in order to maintain a healthy, clean and comfortable residual limb, the socket must have the ability to keep the limb cool. In this study , a sys...
Conference Paper
Full-text available
The aim of this work is to study the effect of vibration on the amputee’s Comfort experimentally. The vibration transmitted from the artificial limb to the human body by free and forced vibration is taken into consideration. An experimental rig was constructed for this purpose and it consists of a shaking table equipped with a cam mechanism, AC mot...
Article
Full-text available
The study consists of three parts: the first of which is manufacturing the KAFOL3 using the classic materials used in (ALKANAT Center for Prosthetic and Orthotic) , while the second parts is suggests a two (KAFOL1 and KAFOL2) lamination in order to achieve safety condition with lower weight and cost .The three models were tested for measuring the m...
Article
Full-text available
This work involving two part the first one is manufacturing and testing the steel specimens without heat treatment , while the second parts is treated the steel specimens by hardening process using different viscosity of quenching cooling oil media .At first the chemical and mechanical properties of steel specimens is measured and tested to know th...
Article
Full-text available
This work involving two part the first one is manufacturing and testing the steel specimens without heat treatment , while the second parts is treated the steel specimens by hardening process using different viscosity of quenching cooling oil media .At first the chemical and mechanical properties of steel specimens is measured and tested to know th...
Chapter
Full-text available
The lower limb amputation account for 80% to 85% of major limb amputation in USA [3] while the percentage increased to 97% in Denmark [4].In Iraq this percentage becomes about 80.7% to 89.3 % at the last ten years [1]. The decision about amputation levels, is made by the surgeon in order to save as much of the limb of patient as possible, in keepi...
Article
Full-text available
In order to initiate a database on materials properties of typical lamination used in above knee prosthetic limb socket fourteen group of different lamination materials layers are manufactured using perlon and fiber glass and acrylic lamination resin matrix 80:20 polyurethane used for human without causing of an irritation .The effect of increasing...

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Projects (11)
Project
Encourage e-learning and work to supplement it with new ideas, modern teaching methods and various methods through benefiting from the experiences of international universities, in order to motivate students and encourage them to join electronic classes..
Project
All Dear Colleagues – Collaborators and Their Laboratories are invited to attach to this project Their old, new and future works or messages about Stability of Structures, especially: buckling, wrinkling, crimpling, crumpling ... and their energy absorption as well as about dynamic stability, slope stability .. of axially and non-axially loaded structures like columns, tubes, pipes, beams, plates, boxes, tanks, silos, pales, poles, pillars, conical shells, thin-walled structures as well as nanostructures, foams, gels.. et cetera .. made of metals, wood, plywood, bamboo, bones, composite, laminate, glass, ceramic, gypsum, concrete, rock, brick .. et cetera .. If any RSGate Member wants to be added to the project as the Collaborator (at least a co/authorship of one work about the stability and following of 50 Members of the Project would be required), He needs to be a follower of a member of the project ... , sorry ... , but in another way, the system of the project doesn't recognize Him, and He can't be added ... Naturally, all Dear Colleagues–Collaborators are asked to add every Colleague, which works on the stability (at least the co/authorship of one work about the stability and following of 50 Members of the Project would be required) ... - and don't hesitate to invite them ... Dear Colleagues–Collaborators, I would like to thank You very much for Your current engagement in our Project, but let me allow to remind You what does mean "Collaboration" in the case of our Project, i.e.: 1. every Colleague–Collaborator of our Project should attach at least 1 work about "Stability of Structures" or a message about it, 2. every Colleague–Collaborator of our Project should follow each other (at least 50 Members of the Project), 3. every Colleague–Collaborator of our Project should read and recommend, if only would be so possibility regarding a scientific level of researches, all works with each other, 4. every Colleague–Collaborator of our Project should comment works to each other if only would be a reason to do that - comments naturally may be critical but with respect to authors, 5. every Colleague–Collaborator of our Project should cite each other - if only would be so possibility regarding research works of each one, i.e. in every new work attached to our Project should be cited a big number, e.g. 100 (a minimum number: 50) works of Collaborators of our Project, 6. every Colleague–Collaborator of our Project should collaborate and write common (with the Collaborators as co-authors) papers, books, ... and other kinds of works, if only would be so possibility, 7. if any Colleague–Collaborator of our Project has a possibility to help to publish works about "Stability of Structures" (e.g. as a member of a scientific journal or publishing house editorial board) should give massage about it in the "goal of the project" or in "updates" in our Project, 8. if any Colleague–Collaborator knows about a conference with "Stability of Structures" as a panel or topic - He should inform us in the "goal of the project" or in "updates" in our Project ... I hope that the above rules of our Project would help us to get success in our scientific work ... , every one of us would like that His work would be noted, read, recommended, commented, discussed, and cited ... , but somebody should do that ... Simultaneously I would like to note that renunciation of the rules of the Project, can be taken by other Collaborators as a kind of dishonesty, especially when a Collaborator would like to obtain a lot of "Reads", "Recommendations" and "Citations", but self doesn't take any so activity .