Manufacturing including machining, metalforming, machine tool dynamics, acoustic emission, sensors and signal processing, CNC, CAD/CAM, machine tool metrology, neural network and expert system applications; smart structures including intelligent health monitoring and damage assessment of composite structures; non-destructive evaluation.
Selected Journal Publications
- Okafor, A. C., Otieno, A. W., Dutta, A., Rao, V. S., "Detection and Characterization of High-Velocity Impact Damage in
Advanced Composite Plates Using Multi-Sensing Techniques," Composite
Structures, Vol. 54, pp. 289-297, 2001.
- Okafor, A. C., Dutta, A., "Determination of Optimal Ultrasonic Pulse Repetition Rate Frequency for
Damage Detection in Composites and Aluminum Plates Using Neural
Networks,"Nondestructive Testing and Evaluation International Journal,
Vol. 34/7, pp. 469-481, July, 2001.
- Enumuoh,E. Ugo, El-Gizawy, A. S., Okafor, A. C., "An Approach for Development of Damage-Free Drilling of Carbon Fiber
Reinforced Thermosets," International Journal of Machine Tools &
Manufacture, Vol. 41, pp. 1795-1814, 2001.
- A. C. Okafor and Y. Ertekin, "Derivation of Machine Tool Error Models and Error Compensation
Procedure for Three Axes Vertical Machining Center Using Rigid Body
Kinematics," International Journal of Machine Tools & Manufacture, 40
- A. C. Okafor, and Y. Ertekin, "Vertical Machining Center Accuracy Characterization Using Laser
Interferometer Part 1. Linear Positional Errors," Journal of Materials
Processing Technology, 105 (2000) 394-406.
- A. C. Okafor and Y. Ertekin, "Vertical Machining Center Accuracy Characterization Using Laser
Interferometer Part 2. Angular Errors," Journal of Materials Processing
Technology, 105 (2000) 407-420.
- A. C. Okafor and A. Dutta, "Structural Damage Detection in Beams by Wavelet Transforms," Smart
Materials and Structures Journal, 9 (2000) 906-917.
- U. E. Enumuoh, A. S. El-Gizawy, A. C. Okafor, "Neural Network Based Sensor Fusion for On-Line Prediction of
Delamination and Surface Roughness in Drilling AS4/PEEK Composites,"
1999 Transactions of the North American Manufacturing Research
Institution of SME, XXVII (1999) 263-268.
- K. Chandrashekhara, A. C. Okafor, and Y. P. Jiang, "Estimation of Contact Force on Composite Plates Using Impact-Induced
Strain and Neural Networks," Composites Part B, 29B (1998) 363-370.