Ayad M. Takhakh

@nahrainuniv.edu.iq

Mechanical Engineering Department
Al - Nahrain University

Ayad M. Takhakh


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https://researchid.co/ayad

RESEARCH INTERESTS

Manufacturing Prov=cesses
Prosthetic & Orthotics Design and Materials Development
Friction Stir Welding
42

Scopus Publications

Scopus Publications

  • Enhanced Upper Limb Exoskeleton Control for Stroke Rehabilitation Using Combined Electromyography and Force Sensors
    Saad M. Sarhan, Mohammed Z. Al-Faiz, Ayad M. Takhakh
    Journal of Engineering and Sustainable Development, 2026
    Most exoskeletons for upper limbs used in stroke rehabilitation rely solely on muscle activity signals, which are often weak and unstable. This study aimed to develop and improve the control method for these exoskeletons. Two Myo Armband sensors and six force sensors were evaluated to collect electromyography (EMG) signals and reaction forces from the forearm and upper arm regions of ten healthy participants. The data was used to control an external exoskeleton for upper limb rehabilitation, including basic hand and elbow movements. Three methodological techniques were adopted for classifying and analyzing electromyography (EMG) data: K-Nearest Neighbors (KNN), Support Vector Machine (SVM), and Linear Discriminant Analysis (LDA). Offline analysis revealed that SVM exhibited the highest accuracy, achieving an average of 95.209% for hand motions utilizing only Myo Armband data and 99.406% for elbow movements among the ten participants. A new method that uses an SVM classifier to combine EMG and force data got 99.1% accuracy. This study demonstrates the superiority of the SVM algorithm in classifying movements and enhancing control of upper limb exoskeletons.
  • Combined mechanical mixing and hydrothermal synthesis of gehlenite-based ceramics
    Auns Qusai Hashim Al-Neami, Hasnaa Shareef Ahmed Jolak, Ayad Murad Takhakh, Fadhil Kareem Farhan
    Tribology and Materials, 2026
    Gehlenite-based ceramics in the CaO-Al2O3-SiO2 calcium aluminosilicate (CAS) system were synthesised using a combined approach that integrates hydrothermal treatment with mechanical mixing. Three formulations with varying CaO:Al2O3:SiO2 ratios were prepared to investigate phase development. The precursor powders were first mechanically mixed in water and subjected to hydrothermal reaction at 200 °C for 48 h, then calcined (1000 °C) and sintered (1200 − 1250 °C) into dense pellets. X-ray diffraction (XRD) analysis confirmed the formation of gehlenite (Ca2Al2SiO7) as the major phase, with minor secondary phases (wollastonite, corundum and cristobalite) noticeable at 1200 °C. Notably, at 1250 °C, the gehlenite reflections intensified, indicating more complete crystallisation. Scanning electron microscopy (SEM) revealed a fine microstructure of submicron particles (0.4 − 0.8 µm) agglomerated into a porous network. Energy-dispersive X-ray spectroscopy (EDS) showed elemental compositions in close agreement with the nominal stoichiometry (within approximately 3 wt. % for Ca, Al and Si), confirming homogeneous mixing. The combined hydrothermal-mechanical route produced gehlenite ceramics at a sintering temperature (approximately 1250 °C) lower than conventional solid-state methods, achieving high phase purity and uniform microstructure. The enhanced phase formation is attributed to improved precursor reactivity and nucleation from the hydrothermal step. This approach offers a viable pathway to fabricate CAS engineering ceramics with controlled crystallinity and porosity for potential high-temperature and structural applications.
  • Analytical and Mechanical Study of Transtibial Osseo-Integrated Prostheses Implant
    Saif Abbas, Jumaa Chiad, Ayad Takhakh, Kadhim Resan, Abdullah Fatlawi, Alaq Saad
    Al Khwarizmi Engineering Journal, 2025
    In amputation surgery, osseointegration is the placement of a metal implant in the residual bone and is conducted with an external prosthesis. In this study, the prospective application of Ti–13Nb–13Zr alloy in a transtibial osseointegrated prosthesis was carefully examined. The alloy demonstrated favourable mechanical properties, such as strong mechanical strength with an average yield strength of 482 MPa, ultimate tensile strength of 551.843 MPa and modulus of elasticity of 74 GPa. In compression testing, the material showed its resilience to compressive loads, exhibiting 700 MPa yield strength and 1010 MPa compressive strength. The elastic modulus of Ti–13Nb–13Zr alloy is approximately 55–65 GPa, which is much closer to that of human bone (10–30 GPa) compared with that of Ti–6Al–4V alloy (110 GPa). This proximity reduces stress shielding, a common issue in implants that a mismatch in stiffness between the implant and bone leads to bone resorption. Analyses using the finite element method demonstrated uniform stress distribution, safety factors and minimal deformation for a range of implant sizes, guaranteeing structural integrity and functionality. The maximal von Mises stress on the tibia bone and implant did not surpass the yield tensile stress of the titanium alloy and bone, which is 470 and 175 MPa, respectively; the maximum safety factor at L=120 and D=3 and the stress levels are not expected to induce material failure. These findings bring up new possibilities for enhanced prosthetic design and use in the field of biomedical engineering by demonstrating the alloy’s potential suitability for osseointegrated prosthetic applications.
  • Performance Evaluation of Gesture Recognition Using Myo Armband and Gyroscope Sensors
    S. M. Sarhan, M. Z. Al-Faiz, A. M. Takhakh
    Al Nahrain Journal for Engineering Sciences, 2025
    The technique of recording muscle signals is crucial in determining how effectively they can be utilized for individual benefit. This study focuses on hand movements recognized by using the Myo armband and Motion Processing Unit (MPU) 6050 sensors. Linear Discriminant Analysis (LDA), K-nearest neighbors (k-NN), and Support Vector Machine (SVM) were employed for classification. sEMG signals using the Myo armband for 7 hand gestures and 2 elbow movements were recorded from 10 healthy subjects. Results showed that SVM outperforms LDA and k-NN in accuracy in both cases, the sensor is worn once on the arm and again on the forearm. regions. The window size and choice of features significantly influence system accuracy, with SVM achieving an average accuracy of 89.84%. Besides that, the fusion of Myo Armband sensor and gyroscope sensor through OR rule makes significant enhancement in recognition accuracy with which is reached to 97.0135%. In conclusion, the Myo armband, when worn on the forearm, proves practical for hand gesture recognition, with SVM offering superior recognition accuracy. Furthermore, the combination of the Myo Armband sensor and the gyroscope sensor showed higher recognition accuracy.
  • Study and Analysis of Below Knee Osseointegration Prosthesis
    Saif M. Abbas, Jumaa S. Chiad, Ayad M. Takhakh Takhakh
    Journal of Engineering and Sustainable Development, 2025
    Osseointegration is a medical metal implant into the residual bone of an amputated limb. The prosthesis can be connected to this implant. Different prosthetic components were thoroughly assessed using a mix of experimental testing and simulation results. The prosthetic foot's outstanding mechanical qualities were revealed during tensile testing on composite materials made of carbon and glass fibers. The mechanical properties of these materials yield stress Ϭy =70MPa, ultimate tensile strength Ϭult =162 MPa, and Young's modulus =2 GPa. For osseointegrated prosthetic components, the implant material yield stress Ϭy =470MPa, ultimate tensile strength Ϭult =558 MPa, and Young's modulus =2.7 GPa, Ti-13Nb-13Zr alloy, demonstrated excellent tensile and compression capabilities. Important information on both metallic and composite materials' durability under cyclic loads was obtained via fatigue testing. The numerical simulations were carried out utilizing the ANSYS 17.2 program. The analysis shows the safety factor for a prosthetic model with below knee osseointegration is 1.563. So that the Von-Mises stress and total deformation were acceptable. The integration of actual data, such as the results of tensile, compression, and fatigue tests, with numerical simulations, highlights the significance of materials and mechanical analysis in developing prosthetic technology, promising improved mobility and quality of life for amputees.
  • Mechanical Design Procedure and Modelling for 8-DOF Upper Limb Rehabilitation Robotic
    Mohanad Al-Asady, Ayad Takhakh, M Al-Temeemi, Rmsma, E Benjamin, et al.
    Baghdad Science Journal, 2025
    Treating muscular medical injuries that impede movement of the human body has become of wide interest because of the importance it holds for improving the lives of people who are exposed to this type of injury. During the past years, several studies have attempted to create a robot that works to rehabilitate the injured upper limbs of the human body. In this research, a curriculum for the procedures will be developed for designing a medical robot by displaying the volumetric tolerances for this robot according to the age and weight of the injured person and the weight and volumetric constants for each part of the robot to be used in the mathematical model that is used to move this robot. Then the design of a robot with 8 DOF will be presented and examined using finite element analysis (FEA) in order to assess its ability to withstand and function in accordance with the load exerted by human weight. The upper limb exoskeleton model is subjected to analysis utilizing the Ansys® software, which facilitates the execution of von Mises stress analysis.
  • Mechanical Properties and Numerical Modelling for Prosthetic Foot
    Saif M. Abbas, Jumaa S. Chiad, Ayad M. Takhakh
    Journal of Engineering and Sustainable Development, 2025
    This study uses laminated composite materials made of hybrid glass and carbon fibers to determine the mechanical characteristics of the foot. Tensile, bending, and fatigue of composite material were evaluated and applied to the ANSYS model. The volume fraction for carbon and glass fibers was 22.5% and 10.04%, respectively. The mechanical property results: σy = 40 MPa, σult = 150 MPa, and E = 1.2 GPa. The patient is a 30-year-old male with a left amputation side, 1.60 meters tall, and weighs 74 kg. The analysis was carried out for the two scenarios (toe-off and heel contact) as boundary conditions. The overall deformation, equivalent stresses, and foot safety factor have been calculated using ANSYS17.2 software. In the end, it appears that the foot is secure based on equivalent stress calculations and the Von-Mises hypothesis. The computed safety factor for the foot is constructed of a chosen composite material with the subsequent layers. When the heel (stance phase) is fixed at 1.3449, and the metatarsal (toe off) is fixed at 1.259, the safety factor for a force of 860 N is reached. The foot is secure, according to the Von-Mises hypothesis.
  • DEAR-Taguchi analysis of buckling load and shear force in AA6061-T6 friction stir spot welds
    Rasha Mohammed Hussein, Bassam Ali Ahmed, Ali Hussein Alwan, Sameh Fareed Hasan, Alaa Abdulhady Jaber, Ayad M. Takhakh, Saja Mohammed Jawad Theiban
    Multiscale and Multidisciplinary Modeling Experiments and Design, 2025
  • Mechanical compressive properties of TPU 3D printed with various parameters
    , Ahmed A. Ameen, Ayad M. Takhakh, , Abdalla Abdal-hay, , , and
    Al Qadisiyah Journal for Engineering Sciences, 2024
    Shape memory polymer (SMP) is a material that has the ability to recover its original shape from a temporary (deformed) shape by applying external stimuli. The smart scaffold based on SMP is used to enhance delivery, load bearing, and tissue defect filling. Therefore, specimens with the structure of the face-centered cubic were produced under various printing conditions to characterize their effects on the mechanical properties. Fused deposition modeling is utilized to construct the specimens of shape memory thermoplastic polyurethane (MM-3520). Printing parameters with different levels were used in specimen fabrication, including layer thicknesses of 0.1, 0.2, and 0.3 mm, printing temperatures of 210, 220, and 230 ° C, and printing speeds of 20, 30, and 40 mm/sec. We performed the microstructural analysis under a microscope to examine the impact of printing factors on lattice structures. Then there is the compression test, which evaluates mechanical properties such as linear elastic stiffness, collapse stress, plateau stiffness, and densification stress. Analyzing the microstructure of the printed specimens exhibits that the specimens with the highest printing temperature, the lowest printing speed, and a thinner printing layer have better layer adhesion and lower porosities. As well, figures and main effect plots revealed that the specimens printed with a layer height of 0.1mm, a printing temperature of 230 ° C, and a printing speed of 20 mm/s had compressive strengths of 0.6129±0.062, 0.6018±0.106, and 0.6082±0.078 MPa, respectively. These are the highest results in terms of strength compared to other levels of parameters.
  • Study and analysis of Ti13Nb13Zr implants in the above knee osseointegration prosthesis
    , Saif Abbas, Ayad Takhakh, , Jumaa Chiad, , Borhen Louhichi, and
    Al Qadisiyah Journal for Engineering Sciences, 2024
    Introduction: Osseointegration is a particular kind of prosthesis that is inserted a short titanium rod or screw into the bone surgically and joined to the prosthetic limb. Experimental part: This study looked at a patient's gait analysis with above-knee amputation wearing an osseointegration prosthesis implant when walking above a force plate. Evaluated the mechanical and fatigue properties of a Ti13Nb13Zr alloy implant. Theoretical part: Drawing and analysis of a femoral bone model with an osseointegration implant using Ansys Workbench 17.2. Results and discussion: The results of the tensile testing showed an ultimate tensile strength of 553 MPa, an average yield strength of 480 MPa, an elongation of 19.66%, and a Young's modulus of 2.73 GPa. Furthermore, a compressive strength of 1010 MPa and a compression yield strength of 700 MPa were found by compression testing. The results of fatigue testing, which were displayed as S-N curves, highlighted the alloy's time-dependent fatigue behavior by showing decreasing fatigue strength with an increase in cycles. The force plate showed a maximum force of 600 N was reported. A strong safety margin was shown by Finite Element Analysis in the bone containing the implant, with safety factors often more than 5 and low deformation (2.4 mm) appropriate for prosthetic uses. A good static design was confirmed by the Von-Mises stress distribution, which was primarily below 46 MPa. Conclusion: Comprehensive results confirm the mechanical feasibility of the Ti13Nb13Zr alloy for prosthetic applications and offer important new information for improving prosthetic design, guaranteeing durability, and improving safety in practical applications.
  • Microstructure and Compressive Peak Stress Analyses of 3D Printed TPU MM-3520
    Ahmed Ameen, Ayad Takhakh, Abdalla Abdal-hay
    Al Nahrain Journal for Engineering Sciences, 2024
  • EEG-Based Control of a 3D-Printed Upper Limb Exoskeleton for Stroke Rehabilitation
    ‪Saad M. Sarhan‬‏, Mohammed Z. Al-Faiz, Ayad Takhakh
    International Journal of Online and Biomedical Engineering, 2024
  • ANALYSIS OF THE TRANSTIBIAL OSSEOINTEGRATION PROSTHESIS
    International Middle Eastern Simulation and Modelling Conference Mesm 2023, 2024
  • Free vibration analysis for polyester/graphene nanocomposites multilayer functionally graded plates
    Shahad Qusi Abd Alqader, Bashar Owaid Bedaiwi, Emad Kadum Njim, Ayad M. Takhakh, Lazreg Hadji
    Physics and Chemistry of Solid State, 2024
  • Investigating the Future of Prosthetics Using Osseointegration Technology-Review
    Saif M. Abbas, Ayad M. Takhakh, Jumaa S. Chiad
    Al Nahrain Journal for Engineering Sciences, 2023
  • A review on EMG/EEG based control scheme of upper limb rehabilitation robots for stroke patients
    Saad M. Sarhan, Mohammed Z. Al-Faiz, Ayad M. Takhakh
    Heliyon, 2023
  • An overview of the latest research on the impact of 3D printing parameters on shape memory polymers
    Ahmed A. Ameen, Ayad M. Takhakh, Abdalla Abdal-hay
    European Polymer Journal, 2023
  • Optimization of Friction Stir Spot Welding Parameters of Al6061T6 by Hybrid Approached
    Rasha Mohammed Hussein, Sameh Fareed Hasan, Ayad M. Takhakh, Mohsin Abdullah Al-Shammari
    Al Nahrain Journal for Engineering Sciences, 2023
  • Effect of rotational speed for friction stir welding/processing on the mechanical properties and microstructure of 5083-O aluminum alloy
    Asmaa M. Abdullah, Salsabil K. Mohammed, Ayad M. Takhakh
    Aip Conference Proceedings, 2023
  • Simulation of gait cycle in sagittal plane for above-knee prosthesis
    Saif M. J. Haider, Ayad M. Takhakh, Muhannad Al-Waily, Yasir Saadi
    Aip Conference Proceedings, 2022
  • Designing a 3D virtual test platform for evaluating prosthetic knee joint performance during the walking cycle
    Saif M. J. Haider, Ayad M. Takhakh, Muhannad Al-Waily
    Open Engineering, 2022
  • A review of use of nanoparticle additives in lubricants to improve its tribological properties
    Zaman Abud Almalik Abud Ali, Ayad M. Takhakh, Muhannad Al-Waily
    Materials Today Proceedings, 2022
  • A Review Study on Measurement and Evaluation of Prosthesis Testing Platform during Gait Cycle within Sagittal Plane
    Saif M. J. Haider, Ayad M. Takhakh, Muhannad Al-Waily
    Proceedings International Conference on Developments in Esystems Engineering Dese, 2021
  • Improvement of buckling behavior of composite plates reinforced with hybrids nanomaterials additives
    Muhannad Al-Waily, Muhsin Jaber Jweeg, Mohsin Abdullah Al-Shammari, Kadhim K. Resan, Ayad Murad Takhakh
    Materials Science Forum, 2021
  • Study and optimization of the mechanical properties of PVP/PVA polymer nanocomposite as a low temperature adhesive in nano-joining
    Ahmed A. Taher, Ayad M Takhakh, Sabah M Thahab
    Iop Conference Series Materials Science and Engineering, 2020
  • Modeling and evaluation of smart economic transfemral prosthetic
    Fahad Mohanad Kadhim, Ayad Murad Takhakh, Jumaa Salman Chiad
    Defect and Diffusion Forum, 2020
  • Effect of friction stir processing parameters on the properties of AA7075-T73/Al2O3 surface metal matrix composite
    Ali H. Al-Helli, Ahmed R. Alhamaoy, Ayad Murad Takhakh
    Materials Science Forum, 2020
  • Effect of heat treatment on mechanical and vibration properties for 6061 and 2024 aluminum alloys
    Journal of Mechanical Engineering Research and Developments, 2020
  • Mechanical properties of polymer with different reinforcement material composite that used for fabricates prosthetic socket
    Fahad M. Kadhim, Ayad M. Takhakh, Asmaa M. Abdullah
    Journal of Mechanical Engineering Research and Developments, 2019
  • Experimental study of improvement shear strength and moisture effect PVP adhesive joints by addition PVA
    A A Taher, A M takhakh, S M Thahab
    Iop Conference Series Materials Science and Engineering, 2018
  • Design and Manufacturing Knee Joint for Smart Transfemoral Prosthetic
    Fahad M Kadhim, Jumaa S Chiad, Ayad M Takhakh
    Iop Conference Series Materials Science and Engineering, 2018
  • A Study of the Mechanical Properties and Gait Cycle Parameter for a Below-Knee Prosthetic Socket
    Ayad M. Takhakh, Saif M. Abbas, Aseel.K. Ahmed
    Iop Conference Series Materials Science and Engineering, 2018
  • Manufacturing and analysis of ankle disarticulation prosthetic socket (SYMES)
    International Journal of Mechanical Engineering and Technology, 2018
  • Manufacturing and analysis of partial foot prosthetic for the Pirogoff amputation
    International Journal of Mechanical and Mechatronics Engineering, 2018
  • Manufacturing and analysis of carbon fiber knee ankle foot orthosis
    Ayad M. Takhakh, Saif M. Abbas
    International Journal of Engineering and Technology Uae, 2018
  • Experimental study and prediction the mechanical properties of nano-joining composite polymers
    Journal of Engineering and Applied Sciences, 2018
  • Effect of Ta addition on hardness and wear resist of Cu-Al-Ni shape memory alloy fabricated by powder metallurgy
    Ayad M. Takhakh, Raied Z. Alfay, Abdul Rahim K. Abid Ali
    Beiac 2013 2013 IEEE Business Engineering and Industrial Applications Colloquium, 2013
  • Vibration analysis and measurement in KNEE ankle foot orthosis for both metal and plastic KAFO type
    Ayad M. Takhakh, Fahad M. Kadhim, Jumaa S. Chiad
    ASME International Mechanical Engineering Congress and Exposition Proceedings Imece, 2013
  • Experimental Investigation and Simulation of Al-Si Casting Microstructure Formation
    Adnan S. Jabur, Jalal M. Jalil, Ayad M. Takhakh
    Arabian Journal for Science and Engineering, 2012
  • Fatigue properties under constant stress/variable stress amplitude and coaxing effect of acicular ductile iron and 42 CrMo4 steel
    Jordan Journal of Mechanical and Industrial Engineering, 2011
  • Fatigue behavior of alloyed acicular ductile iron
    International Journal for the Joining of Materials, 2005

Publications

1. Ayad M. Takhakh, A.R.I. Kheder, N.M. Jubeh, "Fatigue Behavior Of Alloyed Acicular Ductile Iron", International Journal for the Joining of Materials, No.1, Vol. 17, 2005.
2. Ayad M. Takhakh,A.R.I. Kheder,N.M. Jubeh, "Fatigue properties Under Constant Stress/Variable Stress Amplitude and Coaxing Effect of Acicular Ductile Iron and 42CrMo4 Steel", Jordan Journal of Mechanical and Industrial Engineering, Vol. 5, No. 4, , 2011.
3. Ayad M. Takhakh, "Solidification Simulation and Experimental Investigation of Eutectic Al-Si Cast Structure", First scientific Conference For Mechanical and Electrical Eng. and Technologies, Technical College-Najaf. Iraq, 16-17/March, 2008.
4. Akeel D. Subhi, Ayad M. Takhakh, "Simulation of Casting Solidification Parameters in Metallic Mould", Journal of Engineering, Baghdad University, , No.1, pp. 3482-3491, 2009.
5. Ayad M. Takhakh, Ammar I. Saleh, "Microstructure Evolution of Hypoeutectic Al – Si Alloy Using Directional Solidification in Ceramic Mold", The Iraqi Journal for Mechanical and Material Engineering /Babylon University, No. 2, Vol. 10, , 2010.
6. Mohamed A. Al-khateeb, Samer J. AL-Jodi, Ayad M. Takhakh, "Effect of Rotational Speed on Properties of 1060 Aluminum Friction Stir Welds", Scientific Conference For Technical College, Technical College-Najaf, Iraq, , 12-14/4/2010.
7. Mohamed A. Al-khateeb, Samer J. AL-Jodi, Ayad M. Takhakh, "Effect of Tool Shoulder Diameter on The Mechanical Properties of 1200 Aluminum Friction Stir Welding", Journal of Engineering / Baghdad University, , No.6, pp. 1517-1523, 2011.
8. A.R. I. Kheder, N. M. Jubeh, Ayad M. Takhakh, "Fatigue Properties Under Constant Stress/Variable Stress Amplitude And Coaxing Effect of Acicular Ductile Iron And 42 Crmo4 Steel", Jordan Journal of Mechanical and Industrial Engineering, Vol. 5, No. 4, pp. 301-306, 2011.
9. Asmaa M. Abdullah, Ayad M. Takhakh, "An Experimental Investigation on Fatigue Properties of AA 3003-H14 Aluminum Friction Stir Welds", Journal of Engineering / Baghdad University, , No.6, , 2011.
10. Adnan S. Jabur, Jalal M.Jalil, Ayad M. Takhakh, "Experimental Investigation and Simulation of Al–Si Casting Microstructure Formation", Arab J. for Sci. and Eng, DOI 10.1007/s13369-012-0189-2, Springer ,, 2012.
11. Ayad M. Takhakh, Raied Z. Alfay, Abdul Rahim K. Abid Ali, " Prediction the Effect of Al Particle Size on Porosity And Hardness of Cu-Al-Ni Shape Memory Alloy Fabricated By Powder Metallurgy", The First National Conference for Engineering Sciences FNCES '12, 2012.
12. Ayad M. Takhakh, Hamzah N. Shakir, "Experimental And Numerical Evaluation of Friction Stirs Welding of AA 2024-W Aluminum Alloy", Journal of Engineering / Baghdad University, No.6, , , 2012.
13. Ayad M. Takhakh, Raied Z. Alfay, Abdul Rahim K. Abid Ali , "Effect of Ta Addition on Hardness and Wear Resistance of Copper Base Shape Memory Alloy Fabricated by Powder Metallurgy", 2013 IEEE Business Engineering and Industrial Applications Colloquium (BEIAC) , Malaysia, 7-9/April/2013.
14. Ayad M. Takhakh, Raied Z. Alfay, Abdul Rahim K. Abid Ali , " Effect of Nb Addition on Hardness and Wear Resist of Cu-Al-Ni Shape Memory Alloy Fabricated by Powder Metallurgy", Journal of Engineering / Baghdad University, No.1, , , 2014.
15. Ayad M. Takhakh, Asmaa M. A., " Crack Growth Rate of AA 3003-H14 aluminum alloy Friction Stir Welded", The Second Conference for College of Materials /Babylon University, 15-16/5/2013.
16. Ayad M.Takhakh, Fahad M.Kadhim ,Jumaa S.Chiad, "Vibration Measurement and Analysis of knee-Ankle-Foot Orthosis (KAFO) Metal-Metal type", Journal of Engineering / Baghdad University, No.2, , , 2014.
17. Ayad M.Takhakh, Fahad M.Kadhim ,Jumaa S.Chiad, " vibration Analysis in Knee-ankle-foot-orthosis for Both Metal And Plastic KAFO Type", ASME 2013 International Mechanical Engineering, USA, 15-21/12/2013.
18. Ayad M.Takhakh, Fahad M.Kadhim ,Jumaa S.Chiad, "Vibration Measurement and Analysis of knee-Ankle-Foot Orthosis (KAFO) Plastic-Metal Type", Journal of Engineering and Development /AL-Mustansiriya University, NO.6, Vol 17, , 2013.
19. Ali A. Aslman, Ayad M.Takhakh, Kadhim K. Resan, "Study The Mechanical Properties And Numerical Evaluation of Friction Stir Processing (FSP) For 6061-T6- Aluminum Alloys", Al-Nahrain University, College of Engineering Journal (NUCEJ), NO.2, , , 2016.
20. Ali A. Aslman, Ayad M.Takhakh, Kadhim K. Resan, "Enhancements of Mechanical Properties of Friction Stir Welding For 6061 Aluminum Alloy By Friction Stir Processing (FSP) Method", First Basra International Conference for Mechanical Engineering, 8-10/4/2014.
21. Sa’ed A. Shakir, Ayiad M. TAKAK, Esraa A.Abood, "Enhancement Physical and Mechanical Properties of Cu-Ai-Ni Shape Memory Alloys by Sn Addition", 9th International Symposium on Advanced Science and Technology in Experimental Mechanics, 1-6 November, New Delhi, India, 2014.
22. Ali A. Aslman, Ayad M.Takhakh, Kadhim K. Resan, "Effect of Friction Stir Processing (FSP) to the Mechanical properties of 7075-T73 Aluminum Alloys plates Welded By Friction Stir Welding", Journal of Engineering and Development, NO.5, , , 2014.
23. Muhsin J.Jweeg, Ayad M.Takhakh, Nawzad K.Kareem, "Comparison Between Friction Stir Welding (FSW) And Friction Stir Processing (FSP) Of Aa5086 Aluminium Alloy", International Journal of Technical Research and Applications,NO.6, Vol.3, , 2015.
24. Dania Abbas, Kadhim K. Resan, Ayad M. Takhakh, "Microstructure and Mechanical Properties of Ni-Ti-Cu Shape Memory Alloys Biomaterials", ASME International Mechanical Engineering Congress and Exposition,Houston, Texas, USA, November 13-19, 2015 .
25. Mohammed Rahman, Ayad M. Takhakh ,"An investigation to the Effect of Copper Addition on the Characteristics of Ni-Ti Shape Memory Alloy", Al-Nahrain University, College of Engineering Journal (NUCEJ), NO.1, , , 2016.
26. Dania Abbas, Kadhim K. Resan, Ayad M. Takhakh," Optimization of Ni-Ti-Cu Shape Memory Effect Using Minitab Program", International Journal of Energy and Environment, NO.3, Vol.7, , 2016.
27. Ayad M. Takhakh, "Formability of Friction Stir Welded And Processed AA 2024 – O Aluminum Alloy Sheets", Advances in Natural and Applied Sciences, No.1, , , 2016.
28. Muhsin Jweeg ,Ayad M. Takhakh , Saif M. Abbas, "Characterization of Materials Used in Manufacturing The Ankle Foot Ortheses", International Journal of Energy & Environment ISSUE ON APPLIED MECHANICS RESEARCH, NO.4, Vol.8, , 2017.
29. Ayad M. Takhakh, Hassanein Salih Hussain, "Manufacturing, Testing, and Numerical Modeling a Lower Limb Orthosis For a Patient That Has a Partial Foot Amputation", International Journal of Energy & Environment Issue On Applied Mechanics Research, NO.4, Vol.8, , 2017.
30. Dania Abbas, Kadhim K. Resan, Ayad M. Takhakh, "Investigate the Microstructure and the Mechanical Properties of Ni-Ti-Cu Shape Memory Alloys", Al-Nahrain Journal for Engineering Sciences, NO.1, , , 2017.
31. Ayad M. Takhakh, Harith Hammody Abdulla, " Improving the Mechanical Properties of Al7075-T651 Welded Joint Using Direct Friction Stir Processing", The Second Conference of Post Graduate Researches (CPGR'2017), College of Engineering, Al-Nahrain Univ., Baghdad, Iraq, 4 / Oct. 2017.
32. Ayad M. Takhakh, Harith Hammody Abdulla ,"Surface Modification Of Aa 7075-T651 Plate Using Friction Stir Processing With Sic Particles", Emirates Journal for Engineering Research, , No.3, , 2017.
33. Ayad M. Takhakh, Saif M.Abbas, Aseel.K. Ahmed, " Study The Mechanical Properties And Gait Cycle Parameter For Below Knee Prosthetic Socket", The Second International Conference of Engineering sciences / College of Engineering /Karbala University, 26-27 / March 2017.
34. Ayad M. Takhakh," Manufacturing and Analysis of Partial Foot Prosthetic for The Pirogoff Amputation", International Journal of Mechanical & Mechatronics Engineering IJMME-IJENS, Pakistan, , , 2018.
35. Saif M. Abbas , Ayad M. Takhakh, Mohsin Abdullah Al-Shammari, Muhannad Al-Waily, "Manufacturing And Analysis Of Ankle Disarticulation Prosthetic Socket (Symes)", International Journal of Mechanical Engineering and Technology (IJMET), India, Vol.9 , 2018.
36. Saif M. Abbas , Ayad M. Takhakh, "Manufacturing and Analysis of Carbon Fiber Knee Ankle foot orthosis", International Journal of Engineering &Technology, UAE, Vol.7, , 2018 .
37. Ahmed A. Taher, Ayad M. Takhakh, "Experimental Study and Prediction the Mechanical Properties of Nano-Joining Composite Polymers", Journal of Engineering and Applied Sciences, Vol.3, , 2018.
38. Ayad M. Takhakh , Saif M. Abbas, Aseel K. Ahmed, " Study of the Mechanical Properties and Gait Cycle Parameter for a Below-Knee Prosthetic Socket", 2nd International Conference on Engineering Sciences, IOP Conf. Series: Materials Science and Engineering, 2018.
39. Fahad M., Jumaa S., Ayad M.Takhakh, "Design And Manufacturing Knee Joint for Smart TransfemoralProsthetic", International Conference on Materials Engineering and Science, 2018.
40. Fahad Mohanad, Ayad M. Takhakh, Asmaa M. Abdullah, "Mechanical Properties Of Polymer With Different Reinforcement Material Composite That Used For Fabricates Prosthetic Socket", Journal of Mechanical Engineering Research and Developments 42(4):118-123, 2019.
41. Fahad Mohanad, Ayad M. Takhakh, Jumaa Salman Chiad, "Modeling and Evaluation of Smart Economic Transfemral Prosthetic", Defect and Diffusion Forum 398:48-53, 2020.
42. Suhair G. Hussein, Mohsin Abdullah Al-Shammari , Ayad M. Takhakh, Muhannad Al-Waily, "Effect of Heat Treatment on Mechanical and Vibration Properties for 6061 and 2024 Aluminum Alloys", Journal of Mechanical Engineering Research and Developments 43(1):48-66, 2020.
43. Ahmed Taher , Ayad M. Takhakh , S. M. Thahab, "Study and optimization of the mechanical properties of PVP/PVA polymer nanocomposite as a low temperature adhesive in nano-joining", IOP Conference Series Materials Science and Engineering 671:012145, 2020.
44. Dania Fadhil Abbas , Kadhim K. Resan , Ayad M. Takhakh, "Microstructure, mechanical and corrosion properties of the 50%Ni-47%Ti-3%Cu shape memory alloy", IOP Conference Series Materials Science and Engineering 671:012142. 2020.
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