Muhammad Hajj

• PhD (1990) University of Texas at Austin (Civil Engineering)
• MS (1985) University of Texas at Austin (Civil Engineering)
• BE (1983) American University of Beirut (Civil Engineering (with Distinction))

Professor Muhammad R. Hajj is the George Meade Bond Professor, Chair of the Department of Civil, Environmental and Ocean Engineering and Director of the Davidson Laboratory at Stevens Institute of Technology. Dr. Hajj is a renowned scholar in the fields of nonlinear dynamics, fluid mechanics, structural dynamics and fluid-structure interactions with applications in aero- and hydro-elasticity, ships hydrodynamics, biomimetically-inspired air and underwater vehicles, and energy harvesting. To date, he has advised and directed research programs of 28 PhD students who hold prestigious academic and industry positions. He is the author/co-author of over 170 journal publications.

Before joining Stevens Institute of Technology in July 2018, Dr. Hajj was the J. Byron Maupin Professor of Engineering and Director of the NSF funded I/UCRC Center for Energy Harvesting Materials and Systems at Virginia Tech where he oversaw the development of industry-directed energy-related science and technology research programs. At Virginia Tech, he also served as the Associate Dean of Graduate School between 2014 and 2018 where he was involved in the implementation of the Transformative Graduate Education initiative. Dr. Hajj is a Fellow of the Engineering Mechanics Institute and has served as an elected member of its Board of Governors. Dr. Hajj received a B. Eng. degree (with distinction) from the American University of Beirut. He received a M.Sc. and Ph.D. degrees from the University of Texas at Austin.

• Search Committee Vice President for Development and Alumni Engagement Chair
• Search Committee for the position of Vice Provost for Academic Innovation and Faculty Affairs. Chair
• SES PhD task force Member
• SES Task Force on Undergraduate Curricula Member

• Engineering Mechanics Institute ASCE Chair of Programs Committee
• Nonlinear Dynamics Lead Guest Editor
• Journal of Engineering Mechanics Associate Editor
• Nonlinear Dynamics Guest Editor

Stevens Institute of Technology

2018 – Present George Meade Bond Chair

2018 – Present Chair, Department of Civil, Environmental and Ocean Engineering

2018 – Present Director, Davidson Laboratory

Fellow, Engineering Mechanics Institute, American Society of Civil Engineers
American University of Beirut - Distinguished Civil Engineering Alumni, 2019
Virginia Tech - College of Engineering’s Dean’s award for Excellence in Research, 2016
Virginia Tech - Distinguished Leader in Research, Biomedical Engineering and Mechanics, 2016
Virginia Tech -Department of Biomedical Engineering and Mechanics award for Excellence in Research, 2015
Virginia Tech -College of Engineering’s Dean’s award for Excellence in Service, 2009

• ASCE – Engineering Mechanics Institute of the American Society of Civil Engineers Fellow

Floating Oscillating Surge Wave Energy Converter using Controllable Efficient Power Takeoff System, Muhammad R. Hajj (Stevens – lead institution), Lei Zou (Virginia Tech) and William Staby (Resolute Marine Energy), $1,800,000 – Department of Energy, 6/1/2020 – 12/31/2021. Research.

High-resolution Storm Surge Forecasts for New York and New Jersey, Muhammad Hajj (PI), Raju Datla, Philip Orton, Reza Marsooli, and Jon Miller $4,940,000 – Port Authority of New York and New Jersey, 9/1/2019 – 8/31/2024. Research.

Bio-inspired Bistable Energy Harvesting for Fish Telemetry Tags, Muhammad Hajj, $200,000 – National Science Foundation, 9/15/2019 – 8/31/2022. Research.

Energy Harvester, US9786832, Inventors: Abdessattar Abdelkefi, Nathan Sharpes, Shashank Priya, Muhammad R. Hajj, Kyunghoon Cho, Hwiyeol Park, Jin S. Heo,
Current Assignees: Samsung Electronics Co Ltd Virginia Tech Intellectual Properties Inc Virginia Polytechnic Institute and State University. Issue date: 10/10/2017

1. Meesala, V. C.; Robert, B.; Hajj, M.; Shahab, S. (2021). Acoustic pressure patterning for through-wall energy transfer using holographic lenses. Active and Passive Smart Structures and Integrated Systems XV (vol. 11588, pp. 1158806).
2. Meesala, V. C.; Hajj, M.; Shahab, S. (2021). Multiphysics investigations for efficient contactless ultrasound acoustic energy transfer in fluid. Active and Passive Smart Structures and Integrated Systems XV (vol. 11588, pp. 115880X).
3. Qian, F.; Liu, M.; Huang, J.; Zhang, J.; Jung, H.; Deng, Z. D.; Hajj, M.; Zuo, L. (2021). Bio-inspired bistable piezoelectric energy harvester for powering animal telemetry tags: Concept design and preliminary experimental validation. Proceedings of SPIE - The International Society for Optical Engineering (vol. 11588).
4. Shehata, H.; Zakaria, M. Y.; Hajj, M.; Woolsey, C. A. (2019). Aerodynamic Response of a NACA-0012 Airfoil Undergoing Non-Sinusoidal Pitching Waveforms. AIAA Scitech 2019 Forum (pp. 0303).
5. Shehata, H.; Zakaria, M.; Hussein, A.; Hajj, M. (2018). Aerodynamic analysis of flapped airfoil at high angles of attack. 2018 AIAA Aerospace Sciences Meeting (pp. 0037).
6. Beardsley, C.; Bergeron, L.; McLean, A.; Nguyen, K.; Vu, M.; Watson, C.; Nayfeh, A.; Shehata, H.; Woolsey, C.; Hajj, M. (2018). A Modular Biolocomotion Emulator for Hydrodynamic Testing in a Towing Tank. OCEANS 2018 MTS/IEEE Charleston (pp. 1--8).
7. Meesala, V. C.; Hajj, M.; Shahab, S. (2018). Modeling electroelastic nonlinearities in ultrasound acoustic energy transfer systems. Active and Passive Smart Structures and Integrated Systems XII (vol. 10595, pp. 105951G).
8. Bakhtiari-Nejad, M.; Elnahhas, A.; Hajj, M.; Shahab, S. (2018). Passive metamaterial-based acoustic holograms in ultrasound energy transfer systems. Active and Passive Smart Structures and Integrated Systems XII (vol. 10595, pp. 1059518).
9. Hussein, A.; Ragab, S. A.; Taha, H. E.; Hajj, M. (2018). Optimal tail kinematics for fish-like locomotion using the unsteady vortex lattice method. 2018 AIAA Aerospace Sciences Meeting (pp. 0311).
10. Santos, C. R.; Hajj, M.; Marques, F. D. (2018). Structural nonlinearities influence on the energy harvesting from stall-induced oscillations. 2018 AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference (pp. 0464).
11. Taha, H. E.; Allen, D.; Tahmasian, S.; Woolsey, C. A.; Hajj, M. (2016). A Combined Geometric-Control-Averaging to Optimum Trim of Hovering FWMAVs and Insects. AIAA Guidance, Navigation, and Control Conference (pp. 0890).
12. Zakaria, M. Y.; Allen, D. W.; Woolsey, C. A.; Hajj, M. (2016). Lift and drag of flapping membrane wings at high angles of attack. 34th AIAA Applied Aerodynamics Conference (pp. 3554).
13. Yan, Z.; Ragab, S. A.; Hajj, M. (2016). Nonlinear passive control strategies for suppression of transonic flutter. 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference (pp. 1225).
14. Zakaria, M. Y.; Jafari, F.; Hajj, M. (2016). PIV Measurements of a plunging Airfoil at High Angles of Attack. 32nd AIAA Aerodynamic Measurement Technology and Ground Testing Conference (pp. 3401).
15. Taha, H. E. (2015). A geometric control approach for the longitudinal flight stability of hovering insects/fwmavs. AIAA Guidance, Navigation, and Control Conference (pp. 1552).
16. Taha, H. E.; Yan, Z.; Hajj, M. (2015). Geometrically-exact extension of theodorsen’s frequency response model. 53rd AIAA Aerospace Sciences Meeting (pp. 1502).
17. Zakaria, M. Y.; Taha, H. E.; Hajj, M. (2015). Experimnetal Investigations of the Lift Frequency Response at High Angels of Attack. 53rd AIAA Aerospace Sciences Meeting (pp. 1503).
18. Zakaria, M. Y.; Taha, H. E.; Hajj, M.; Hussein, A. A. (2015). Experimental-based unified unsteady nonlinear aerodynamic modeling for two-dimensional airfoils. 33rd AIAA Applied Aerodynamics Conference (pp. 3167).
19. Vasconcellos, R. M.; Abdelkefi, A.; Marques, Fl\'avio D; Hajj, M.; Pereira, D. A.; Marques, Fl\'avio D; Bergamo, L. F.; Gennaro, Elmer Mateus Autor UNESP; Theofilis, V.; Medeiros, M. A.; others (2014). Characterization of grazing bifurcation in airfoils with control surface freeplay nonlinearity. Proceedings of the 9th International Conference on Structural Dynamics--EURODYN (vol. 2014).
20. Taha, H. E.; Nayfeh, A.; Hajj, M. (2014). Eff [|\# 27\#|] ect of the Parametric Excitation on the Longitudinal Stability of Hovering MAVs/Insects. AIAA Atmospheric Flight Mechanics Conference (pp. 0891).
21. Bichiou, Y.; Taha, H. E.; Hajj, M. (2014). Investigation on the effectiveness of a nonlinear energy sink on an aeroelastic system. 55th AIAA/ASMe/ASCE/AHS/SC Structures, Structural Dynamics, and Materials Conference (pp. 0152).
22. Yan, Z.; Abdelkefi, A.; Hajj, M. (2014). Nonlinear Dynamics Characterization of Piezoelectric Energy Harvesters from Hybrid Vibrations. 55th AIAA/ASMe/ASCE/AHS/SC Structures, Structural Dynamics, and Materials Conference (pp. 0153).
23. Bichiou, Y.; Abdelkefi, A.; Hajj, M. (2014). Nonlinear Modeling and Analysis of Wind Turbine Blades. 55th AIAA/ASMe/ASCE/AHS/SC Structures, Structural Dynamics, and Materials Conference (pp. 1370).
24. Zakaria, M. Y.; Taha, H. E.; Hajj, M. (2014). Shape and kinematic design optimization of the pterosaur replica. 14th AIAA Aviation Technology, Integration, and Operations Conference (pp. 2869).

1. Hajj, M.; Mehmood, A.; Akhtar, I. (2021). Single-degree-of-freedom model of displacement in vortex-induced vibrations. Nonlinear Dynamics (2 ed., vol. 103, pp. 1305-1320).
2. Hajj, M.; Mehmood, A.; Akhtar, I.; Billah, K. (2021). VIV Control Strategies Using Displacement-Based Phenomenological Model. Journal of Applied and Computational Mechanics (vol. 7, pp. 1090-1097).
3. Basta, E.; Ghommem, M.; Romdhane, L.; Hajj, M. (2021). Hybrid tail excitation for robotic fish: Modeling and performance analysis. Ocean Engineering (vol. 234).
4. Meesala, V. C.; Hajj, M.; Shahab, S. (2020). Modeling and identification of electro-elastic nonlinearities in ultrasonic power transfer systems. Nonlinear Dynamics (1 ed., vol. 99, pp. 249--268). Springer Netherlands.
5. Meesala, V. C.; Hajj, M.; Shahab, S. (2020). Shock formation distance—A design parameter for high power acoustic energy transfer systems. The Journal of the Acoustical Society of America (4 ed., vol. 148, pp. 2560--2560). Acoustical Society of America.
6. Meesala, V. C.; Hajj, M.; Abdel-Rahman, E. (2020). Bifurcation-based MEMS mass sensors. International Journal of Mechanical Sciences (vol. 180, pp. 105705). Pergamon.
7. Bhargava, A.; Meesala, V. C.; Hajj, M.; Shahab, S. (2020). Nonlinear effects in high-intensity focused ultrasound power transfer systems. Applied Physics Letters (6 ed., vol. 117, pp. 064101). AIP Publishing LLC.
8. Meesala, V. C.; Hajj, M.; Shahab, S. (2020). Analysis and prediction of shock formation in acoustic energy transfer systems. arXiv preprint arXiv:2007.08647.
9. Meesala, V. C.; Ragab, S.; Hajj, M.; Shahab, S. (2020). Acoustic-electroelastic interactions in ultrasound energy transfer systems: Reduced-order modeling and experiment. Journal of Sound and Vibration (pp. 115255). Academic Press.
10. Bakhtiari-Nejad, M.; Hajj, M.; Shahab, S. (2020). Dynamics of acoustic impedance matching layers in contactless ultrasonic power transfer systems. Smart Materials and Structures (3 ed., vol. 29, pp. 035037). IOP Publishing.
11. Yan, Z.; Sun, W.; Hajj, M.; Zhang, W.; Tan, T. (2020). Ultra-broadband piezoelectric energy harvesting via bistable multi-hardening and multi-softening. Nonlinear Dynamics (pp. 1--21). Springer Netherlands.
12. Yan, Z.; Wang, L.; Hajj, M.; Yan, Z.; Sun, Y.; Tan, T. (2020). Energy harvesting from iced-conductor inspired wake galloping. Extreme Mechanics Letters (vol. 35, pp. 100633). Elsevier.
13. Ghommem, M.; Bourantas, G.; Wittek, A.; Miller, K.; Hajj, M. (2020). Hydrodynamic modeling and performance analysis of bio-inspired swimming. Ocean Engineering (vol. 197, pp. 106897). Pergamon.
14. Li, H.; Liu, D.; Wang, J.; Shang, X.; Hajj, M. (2020). Broadband bimorph piezoelectric energy harvesting by exploiting bending-torsion of L-shaped structure. Energy Conversion and Management (vol. 206, pp. 112503). Elsevier.
15. Qian, F.; Hajj, M.; Zuo, L. (2020). Bio-inspired bi-stable piezoelectric harvester for broadband vibration energy harvesting. Energy Conversion and Management (vol. 222, pp. 113174). Pergamon.
16. Al Nuaimi, S. K.; Meesala, V. C.; Hajj, M. (2019). Phenomenological model of piezoelectric energy harvesting from galloping oscillations. Applied Physics Letters (19 ed., vol. 115, pp. 193701). AIP Publishing LLC.
17. Shehata, H. S.; Hajj, M.; Woolsey, C. A.; Ragab, S. (2019). Effects of flexible propulsors on hydrodynamic forces. IFAC-PapersOnLine (21 ed., vol. 52, pp. 14--20).
18. Shehata, H. S.; Woolsey, C. A.; Hajj, M. (2019). Hydrodynamic performance of a modular biolocomotion emulator. IFAC-PapersOnLine (21 ed., vol. 52, pp. 1--7).
19. Nie, X.; Tan, T.; Yan, Z.; Yan, Z.; Hajj, M. (2019). Broadband and high-efficient L-shaped piezoelectric energy harvester based on internal resonance. International Journal of Mechanical Sciences (vol. 159, pp. 287--305). Pergamon.
20. Hussein, A. A.; Seleit, A. E.; Taha, H. E.; Hajj, M. (2019). Optimal transition of flapping wing micro-air vehicles from hovering to forward flight. Aerospace Science and Technology (vol. 90, pp. 246--263). Elsevier Masson.
21. Liu, D.; Li, H.; Feng, H.; Yalkun, T.; Hajj, M. (2019). A multi-frequency piezoelectric vibration energy harvester with liquid filled container as the proof mass. Applied Physics Letters (21 ed., vol. 114, pp. 213902). AIP Publishing.
22. Nie, X.; Tan, T.; Yan, Z.; Yan, Z.; Hajj, M. (2019). Broadband and high-efficient L-shaped piezoelectric energy harvester based on internal resonance. International Journal of Mechanical Sciences. Pergamon.
23. dos Santos, C. R.; Marques, Fl\'avio D; Hajj, M. (2019). The effects of structural and aerodynamic nonlinearities on the energy harvesting from airfoil stall-induced oscillations. Journal of Vibration and Control (pp. 1077546319844383). SAGE Publications Sage UK: London, England.
24. Meesala, V. C.; Hajj, M.; Shahab, S. (2019). Modeling and identification of electro-elastic nonlinearities in ultrasonic power transfer systems. Nonlinear Dynamics (pp. 1--20). Springer Netherlands.
25. Meesala, V. C.; Hajj, M. (2019). Parameter sensitivity of cantilever beam with tip mass to parametric excitation. Nonlinear Dynamics (4 ed., vol. 95, pp. 3375--3384). Springer Netherlands.
26. Vamsi C Meesala, Muhammad R Hajj; Hajj, M. (2019). Response variations of a cantilever beam--tip mass system with nonlinear and linearized boundary conditions. Journal of Vibration and Control (3 ed., vol. 25, pp. 485--496). Sage Publications Sage UK: London, England.
27. Mehmood, A.; Abdelkefi, A.; Hajj, M.; Akhtar, I. (2019). On the onset of bifurcation and nonlinear characterization of vortex-induced vibrations under varying initial conditions. Nonlinear Dynamics (1 ed., vol. 99, pp. 575--592). Springer Netherlands.
28. Yan, Z.; Ragab, S. A.; Hajj, M. (2018). Passive control of transonic flutter with a nonlinear energy sink. Nonlinear Dynamics (1 ed., vol. 91, pp. 577--590). Springer Netherlands.
29. Marques, Fl\'avio D; Pereira, D. A.; Zakaria, M. Y.; Hajj, M. (2018). Power extraction from stall-induced oscillations of an airfoil. Journal of Intelligent Material Systems and Structures (7 ed., vol. 29, pp. 1407--1417). SAGE Publications Sage UK: London, England.
30. Bakhtiari-Nejad, M.; Elnahhas, A.; Hajj, M.; Shahab, S. (2018). Acoustic holograms in contactless ultrasonic power transfer systems: Modeling and experiment. Journal of Applied Physics (24 ed., vol. 124, pp. 244901). AIP Publishing.
31. Hussein, A. A.; Taha, H. E.; Ragab, S.; Hajj, M. (2018). A variational approach for the dynamics of unsteady point vortices. Aerospace Science and Technology (vol. 78, pp. 559--568). Elsevier Masson.
32. Alrowaijeh, J. S.; Hajj, M. (2018). Autonomous self-powered water meter. Applied Physics Letters (3 ed., vol. 113, pp. 033902). AIP Publishing.
33. Meesala, V. C.; Hajj, M. (2018). Identification of nonlinear piezoelectric coefficients. Journal of Applied Physics (6 ed., vol. 124, pp. 065112). AIP Publishing.
34. Al-Haik, M. Y.; Alothman, A. A.; Hajj, M. (2018). Integrated Thermoelectric Energy Generator and Organic Storage Device. Energy Harvesting and Systems (3-4 ed., vol. 5, pp. 73--79). De Gruyter.
35. Alrowaijeh, J. S.; Hajj, M. (2018). Wirelessly controlled harvester/sensor of air speed. Multiscale and Multidisciplinary Modeling, Experiments and Design (2 ed., vol. 1, pp. 97--101). Springer International Publishing.
36. Liu, D.; Al-Haik, M.; Zakaria, M.; Hajj, M. (2018). Piezoelectric energy harvesting using L-shaped structures. Journal of Intelligent Material Systems and Structures (6 ed., vol. 29, pp. 1206--1215). SAGE Publications Sage UK: London, England.
37. Zakaria, M. Y.; Ibrahim, M. M.; Ragab, S.; Hajj, M. (2018). A computational study of vortex shedding from a NACA-0012 airfoil at high angles of attack. International Journal of Aerodynamics (1 ed., vol. 6, pp. 1--17). Inderscience Publishers (IEL).
38. Liu, M.; Lin, R.; Zhou, S.; Yu, Y.; Ishida, A.; McGrath, M.; Kennedy, B.; Hajj, M.; Zuo, L. (2018). Design, simulation and experiment of a novel high efficiency energy harvesting paver. Applied energy (vol. 212, pp. 966--975). Elsevier.
39. Hussein, A. A.; Hajj, M.; Woolsey, C. (2018). Stable, planar self propulsion using a hinged flap. IFAC-PapersOnLine (29 ed., vol. 51, pp. 395--399). Elsevier.
40. Alrowaijeh, J. S.; Hajj, M. (2018). Piezoelectric energy harvesting from flexible delta wings. Theoretical and Applied Mechanics Letters (4 ed., vol. 8, pp. 267--271). Elsevier.
41. Zakaria, M.; Marques, F.; Pereira, D.; Hajj, M.; Ragab, S. (2017). An experimental assessment of unsteady forces on a plunging airfoil oscillating in stationary fluid at high frequencies. The Military Technical College.
42. Al-Haik, M. Y.; Haik, Y.; Hajj, M. (2017). Characterization of CdS and AgPt nanofillers used in organic capacitors. Synthetic Metals (vol. 223, pp. 26--33). Elsevier.
43. Al-Haik, M. Y.; Boroujeni, A. Y.; Zakaria, M. Y.; Hajj, M. (2017). Effect of embedding ZnO nanorods on nonlinear response of composite beams. Nonlinear Dynamics (2 ed., vol. 90, pp. 1179--1189). Springer Netherlands.
44. Zakaria, M.; Taha, H.; Hajj, M. (2017). Measurement and modeling of lift enhancement on plunging airfoils: A frequency response approach. Journal of Fluids and Structures (vol. 69, pp. 187--208). Academic Press.
45. Yan, Z.; Hajj, M. (2017). Nonlinear performances of an autoparametric vibration-based piezoelastic energy harvester. Journal of Intelligent Material Systems and Structures (2 ed., vol. 28, pp. 254--271). SAGE Publications Sage UK: London, England.
46. Zakaria, M. Y.; Eliethy, A. S.; Canfield, R. A.; Hajj, M. (2016). A novel imaging technique for measuring kinematics of light-weight flexible structures. Review of Scientific Instruments (7 ed., vol. 87, pp. 075108). AIP Publishing.
47. Vasconcellos, R. M.; Abdelkefi, A.; Hajj, M.; Almeida, D. P.; Marques, Fl\'avio D (2016). Airfoil control surface discontinuous nonlinearity experimental assessment and numerical model validation. Journal of Vibration and Control (6 ed., vol. 22, pp. 1633--1644). SAGE Publications Sage UK: London, England.
48. Hajj, M.; Zakaria, M. Y.; Taha, H. E. (2016). Design Optimization of Flapping Ornithopters: The Pterosaur Replica in Forward Flight. AIAA: American Institute of Aeronautics and Astronautics.
49. Hussein, A. A.; Hajj, M.; Elkholy, S. M.; ELbayoumi, G. M. (2016). Dynamic stability of hingeless rotor blade in hover using pad\'e approximations. AIAA Journal (pp. 1769--1777). American Institute of Aeronautics and Astronautics.
50. Bichiou, Y.; Hajj, M.; Nayfeh, A. H. (2016). Effectiveness of a nonlinear energy sink in the control of an aeroelastic system. Nonlinear Dynamics (4 ed., vol. 86, pp. 2161--2177). Springer Netherlands.
51. Pereira, D. A.; Vasconcellos, R. M.; Hajj, M.; Marques, Fl\'avio D (2016). Effects of combined hardening and free-play nonlinearities on the response of a typical aeroelastic section. Aerospace Science and Technology (vol. 50, pp. 44--54). Elsevier Masson.
52. Tan, T.; Yan, Z.; Hajj, M. (2016). Electromechanical decoupled model for cantilever-beam piezoelectric energy harvesters. Applied Physics Letters (10 ed., vol. 109, pp. 101908). AIP Publishing.
53. Ben Ayed, S.; Ragab, S. A.; Hajj, M. (2016). Flow Control of Extreme Pressure Loads Associated with Flow Separation. JOURNAL OF ENGINEERING MECHANICS (2 ed., vol. 142). ASCE-AMER SOC CIVIL ENGINEERS 1801 ALEXANDER BELL DR, RESTON, VA 20191-4400 USA.
54. Al-Haik, M. Y.; Hajj, M. (2016). Integrated piezoelectric energy harvesting and organic storage system. Energy Harvesting and Systems (2 ed., vol. 3, pp. 113--119). De Gruyter.
55. Bichiou, Y.; Abdelkefi, A.; Hajj, M. (2016). Nonlinear aeroelastic characterization of wind turbine blades. Journal of Vibration and Control (3 ed., vol. 22, pp. 621--631). SAGE Publications Sage UK: London, England.
56. Al-Haik, M. Y.; Zakaria, M. Y.; Hajj, M.; Haik, Y. (2016). Storage of energy harvested from a miniature turbine in a novel organic capacitor. Journal of Energy Storage (vol. 6, pp. 232--238). Elsevier.
57. Bichiou, Y.; Nuhait, A.; Abdelkefi, A.; Hajj, M. (2016). Unsteady aeroelastic behaviors of rigid airfoils with preset angles of attack. Journal of Vibration and Control (4 ed., vol. 22, pp. 1010--1022). SAGE Publications Sage UK: London, England.
58. Alothman, A. A.; Zakaria, M. Y.; Hajj, M.; Masri, S. F. (2016). Use of thermoelectric generator for water flow metering. Applied Physics Letters (3 ed., vol. 109, pp. 033903). AIP Publishing.
59. Ayed, S. B.; Ragab, S. A.; Hajj, M. (2015). Flow control of extreme pressure loads associated with flow separation. Journal of Engineering Mechanics (2 ed., vol. 142, pp. 04015068). American Society of Civil Engineers.
60. Zakaria, M. Y.; Taha, H. E.; Hajj, M. (2015). Design optimization of flapping ornithopters: the pterosaur replica in forward flight. Journal of Aircraft (1 ed., vol. 53, pp. 48--59). American Institute of Aeronautics and Astronautics.
61. Yan, Z.; Taha, H. E.; Hajj, M. (2015). Effects of aerodynamic modeling on the optimal wing kinematics for hovering MAVs. Aerospace Science and Technology (vol. 45, pp. 39--49). Elsevier Masson.
62. Yan, Z.; Hajj, M. (2015). Energy harvesting from an autoparametric vibration absorber. Smart Materials and Structures (11 ed., vol. 24, pp. 115012). IOP Publishing.
63. Pereira, D. A.; Vasconcellos, R.; Hajj, M.; Marques, F. D. (2015). Insights on aeroelastic bifurcation phenomena in airfoils with structural nonlinearities. Math. Eng. Sci. Aerosp.(MESA) (3 ed., vol. 6, pp. 399--424).
64. Vasconcellos, R.; Abdelkefi, A. (2015). Nonlinear dynamical analysis of an aeroelastic system with multi-segmented moment in the pitch degree-of-freedom. Communications in Nonlinear Science and Numerical Simulation (1 ed., vol. 20, pp. 324--334). Elsevier.
65. Sharpes, N.; Abdelkefi, A.; Hajj, M.; Heo, J.; Cho, K.; Priya, S. (2015). Preloaded freeplay wide-bandwidth low-frequency piezoelectric harvesters. Applied Physics Letters (2 ed., vol. 107, pp. 023902). AIP Publishing.
66. Taha, H. E.; Tahmasian, S.; Woolsey, C. A.; Nayfeh, A. H.; Hajj, M. (2015). The need for higher-order averaging in the stability analysis of hovering, flapping-wing flight. Bioinspiration \& biomimetics (1 ed., vol. 10, pp. 016002). IOP Publishing.
67. Taha, H. E.; Hajj, M.; Roman, A. H.; Nayfeh, A. H. (2014). Calculus of variations approach for optimum maneuverability of flapping micro-air-vehicles near hover. Journal of Guidance, Control, and Dynamics (4 ed., vol. 37, pp. 1367--1373). American Institute of Aeronautics and Astronautics.
68. Ben Ayed, S.; Ragab, S. A.; Hajj, M. (2014). Control of extreme loads on structures using membrane vibrations. Journal of Engineering Mechanics (4 ed., vol. 141, pp. 04014146). American Society of Civil Engineers.
69. Ben Ayed, S.; Abdelkefi, A.; Najar, F.; Hajj, M. (2014). Design and performance of variable-shaped piezoelectric energy harvesters. Journal of Intelligent Material Systems and Structures (2 ed., vol. 25, pp. 174--186). Sage Publications Sage UK: London, England.
70. Taha, H. E.; Nayfeh, A. H.; Hajj, M. (2014). Effect of the aerodynamic-induced parametric excitation on the longitudinal stability of hovering MAVs/insects. Nonlinear Dynamics (4 ed., vol. 78, pp. 2399--2408). Springer Netherlands.
71. Mehmood, A.; Nayfeh, A. H.; Hajj, M. R. (2014). Effects of a non-linear energy sink (NES) on vortex-induced vibrations of a circular cylinder. Nonlinear dynamics (3 ed., vol. 77, pp. 667--680). Springer Netherlands.
72. Yan, Z.; Taha, H. E.; Hajj, M. (2014). Geometrically-exact unsteady model for airfoils undergoing large amplitude maneuvers. Aerospace Science and Technology (vol. 39, pp. 293--306). Elsevier Masson.
73. Vasconcellos, R.; Abdelkefi, A.; Hajj, M.; Marques, Fl\'avio Donizeti (2014). Grazing bifurcation in aeroelastic systems with freeplay nonlinearity. Communications in Nonlinear Science and Numerical Simulation (5 ed., vol. 19, pp. 1611--1625). Elsevier.
74. Abdelkefi, A.; Hasanyan, A.; Montgomery, J.; Hall, D.; Hajj, M. (2014). Incident flow effects on the performance of piezoelectric energy harvesters from galloping vibrations. Theoretical and Applied Mechanics Letters (2 ed., vol. 4, pp. 022002). Elsevier.
75. Mehmood, A.; Abdelkefi, A.; Akhtar, I.; Nayfeh, A.; Nuhait, A.; Hajj, M. (2014). Linear and nonlinear active feedback controls for vortex-induced vibrations of circular cylinders. Journal of Vibration and control (8 ed., vol. 20, pp. 1137--1147). Sage Publications Sage UK: London, England.
76. Taha, H. E.; Hajj, M.; Nayfeh, A. H. (2014). Longitudinal flight dynamics of hovering MAVs/insects. Journal of Guidance, Control, and Dynamics (3 ed., vol. 37, pp. 970--979). American Institute of Aeronautics and Astronautics.
77. Abdelkefi, A.; Barsallo, N.; Tang, L.; Yang, Y.; Hajj, M. (2014). Modeling, validation, and performance of low-frequency piezoelectric energy harvesters. Journal of Intelligent Material Systems and Structures (12 ed., vol. 25, pp. 1429--1444). Sage Publications Sage UK: London, England.
78. Abdelkefi, A.; Ghommem, M.; Nuhait, A. O.; Hajj, M. (2014). Nonlinear analysis and enhancement of wing-based piezoaeroelastic energy harvesters. Journal of Sound and Vibration (1 ed., vol. 333, pp. 166--177). Academic Press.
79. Abdelkefi, A.; Yan, Z.; Hajj, M. (2014). Performance analysis of galloping-based piezoaeroelastic energy harvesters with different cross-section geometries. Journal of Intelligent Material Systems and Structures (2 ed., vol. 25, pp. 246--256). Sage Publications Sage UK: London, England.
80. Yan, Z.; Abdelkefi, A.; Hajj, M. (2014). Piezoelectric energy harvesting from hybrid vibrations. Smart Materials and Structures (2 ed., vol. 23, pp. 025026). IOP Publishing.
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1. Abdelkefi, A.; Sharpes, N.; Priya, S.; Hajj, M.; Kyunghoon, C.; Hwiyeol, P.; Heo, J. S. (2017). Energy harvester.
2. Park, Y.; Park, Y. (2016). Energy Harvester.

OE 630: Hydrodynamics
CE 342: Fluid Mechanics