Electronic Theses and Dissertations





Document Type


Degree Name

Master of Science


Mechanical Engineering

Committee Chair

Gary Qi

Committee Member

Teong Tan


The field of Non-Destructive Testing (NDT) for inspection of multilayered armor plates is one that includes several different and distinct methods, with the main method being X-Ray. Defects or cracks in the armor (either from manufacturing errors or from service usage damage) that are not on the surface layer are not detectable by sight and can lead to armor failure while in service. Current NDT methods are costly and time consuming becausee they require the armor plate to be removed from service and taken to a laboratory for testing. A portable and reliable NDT method for field inspection of armor would be of great value to military and police security. A successful NDT method would allow for regular scheduled testing and provide assurance to the continued usage of protective armor. This research has tested and identified an ultrasonic wave method where pulses were sent perpendicular and parallel to the pressed direction and then analyzed to obtain the time of flight. A Flight Time Matrix was created and processed to successfully locate sub-millimeter defects within multilayered armor plates including delamination between layers and cracks.


Data is provided by the student.

Library Comment

Dissertation or thesis originally submitted to the local University of Memphis Electronic Theses & dissertation (ETD) Repository.