Jay Tu


  • 919-515-5670
  • Engineering Building III (EB3) 4170
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As an educator, Dr. Tu’s highest priority is to teach strong fundamentals and to relate them to real-world problems. At the graduate level, Dr. Tu teaches Principles of Structural Vibration (MAE 513). This course is an introductory course on mechanical vibration that follows a traditional exposition. He places a strong emphasis on the formulation of vibration problems and an additional emphasis on its broad applicability beyond mechanical systems, such as music and science. Dr. Tu will introduce a new course in Precision Laser Material Processing in the coming semesters for both graduate students and seniors.

At the undergraduate level, Dr. Tu teaches Manufacturing Processes (MAE 496M) and Analysis for Mechanical Engineering Design (MAE 415). In MAE 496M, the goal is to review the major manufacturing processes, how design is carried out using these processes, and how these manufacturing processes solve engineering problems. Dr. Tu shows through proper dimensioning how different processes are integrated to achieve required tolerances. In MAE 415, Dr. Tu teaches design from the perspective of how required precision is achievable; bringing manufacturing into the design process from the beginning.

The role of lasers in engineering is fascinating; lasers are unique in that they operate on the basis of a purely human-made physical phenomenon and their use brings in understanding of electrodynamics, mechanics, and thermodynamics, making the subject rich and complex — the number and variety of applications are almost limitless. Dr. Tu expects his graduate students to have a strong sense of urgency and be an active thinker to attack problems, moving forward aggressively. This philosophy will help students to develop into confident solvers of engineering problems, making them well-prepared for the workplace.

Outside of work, Dr. Tu enjoys spending time with his family and playing tennis. As hobbies, he enjoys photography, collecting classical cameras from the perspective of precision machine design, and rebuilding musical instruments based on engineering vibration analysis.



University of Michigan


National Tsing-Hua University


National Taiwan University

Research Description

Dr. Tu is interested in laser material processing, high speed machining/spindle technology, precision engineering, mechatronics, modeling, monitoring, and control of dynamic systems. Dr. Tu's long term goal is to contribute to the advancement of lasers in engineering. Currently, Dr. Tu is 1) studying the fundamental mechanisms in laser welding of aluminum to improve the repair of fatigue cracks in aerospace materials, 2) using lasers as a manufacturing tool and design approach to improve the energy efficiency of solar panels, and 3) studying laser micro-hole drilling for fuel injectors, nozzles, and medical devices. Laser micro-hole drilling offers significant advantages resulting from its ability to produce high depth-to-cross-section ratios and fast material removal rates.


Laser synthesis of a copper-single-walled carbon nanotube nanocomposite via molecular-level mixing and non-equilibrium solidification
Tu, J. F., Rajule, N., Molian, P., & Liu, Y. (2016), Journal of Physics. D, Applied Physics, 49(49).
Effect of the magnetic pole arrangement on the surface roughness of STS 304 by magnetic abrasive machining
Yoon, S., Tu, J. F., Lee, J. H., Yang, G. E., & Mun, S. D. (2014), International Journal of Precision Engineering and Manufacturing, 15(7), 1275-1281.
Low-temperature evaporative glass scoring using a single-mode ytterbium fiber laser
Tu, J. F., & Riley, P. E. B. (2013), Optics and Lasers in Engineering, 51(6), 696-706.
Fatigue crack fusion in thin-sheet aluminum alloys AA7075-T6 using low-speed fiber laser welding
Tu, J. F., & Paleocrassas, A. G. (2011), Journal of Materials Processing Technology, 211(1), 95-102.
Inherent instability investigation for low speed laser welding of aluminum using a single-mode fiber laser
Paleocrassas, A. G., & Tu, J. F. (2010), Journal of Materials Processing Technology, 210(10), 1411-1418.
A Practical method for determining the beam profile near the focal spot
Harp, W. R., Paleocrassas, A. G., & Tu, J. F. (2008), International Journal of Advanced Manufacturing Technology, 37(11-12), 1113-1119.
Development of a localized heat treatment system for shape memory alloy wires using an ytterbium fiber laser
Dennis, R. S., & Tu, J. F. (2008), Journal of Materials Processing Technology, 199(1-3), 245-255.
Laser ablation using a long-pulsed, high-fluence, CW single-mode fiber laser
Harp, W. R., Dilwith, J. R., & Tu, J. F. (2008), Journal of Materials Processing Technology, 198(1-3), 22-30.
Tolerance design for the fit between bore and shaft for precision assemblies with significant error- scaling problems
Sweet, A. L., & Tuz, J. F. (2007), International Journal of Production Research, 45(22), 5223-5241.
Low-speed laser welding of aluminum alloy 7075-T6 using a 300-W,single-mode, ytterbium fiber laser
Paleocrassas, A. G., & Tu, J. F. (2007), Welding Journal, 86(6), 179S-186S.

View all publications via NC State Libraries


EAGER Collaborative Research: Nanocomposite Copper Tooling for Faster Cycle and Improved Precision in Plastic Molding Proof of Concept
National Science Foundation (NSF)(7/15/09 - 12/31/10)
SGER: Synergistic and Inherently Stable Laser/Plasma-Jet Welding Processes: Proof of Concept
National Science Foundation (NSF)(9/15/07 - 8/31/09)
Quantitative Roundness Design and Quality Assurance For Ultra-Precision Assemblies With Significant Error-Scaling Problems
National Science Foundation (NSF)(6/01/04 - 5/31/08)