Wear, lubrication failure and product defects automated machining is proposed. the instrument would continuously monitor automated metalworking on lathes, milling machines, drill presses and punch presses, and would be capable of self-optimizing adaptive machining control. a theoretical background… More

Semiconductor industry statistics show that insufficient microelectronic interconnection wire bond strenght is the seconf largest cause of device failure. arguments have been raised that the conventional nondestructive wire pull test used in the industry can induce sub-critical damage which will… More

An ultimate goal of genetic engineering is to build into plants the genes that provide resistance to a wide range of environmental stresses so as to promote biomass production. a necessary prerequisite to genetic engineering for drought resistance is to understand the mechanisms that confer drought… More

A concept for the detection of corrosion in aging aircraft using acoustic emission monitoring is proposed. corrosion will be located through the effect that it has on airframe strength (10% thinning results in 50% fatigue life reduction). acoustic emission technology used on the f-111 fighter/bomber… More

Acoustic emission can detect flaws in tank cars without removal of lining or insulation. this relatively new method has already been used successfully on about 10,000 cars. however, there have been some shortcomings in the areas of reliability and interpretaton. this project will address and correct… More

Although vibration analysis has been successfully used to monitor rotorcraft mechanical components, there are problems with system implementation and development which limit the method. Acoustical methods need to be evaluated for aircraft health monitoring on a realtime basis to detect defective… More

Advanced armor composites offer lightweight designs using unique materials, laminated together, to provide the same protection as its metal counterpart. Using these different material designs also means dealing with different types of defects. Delaminations between the different layers of materials… More

Recently, significant attention has been paid to the country's dilapidated infrastructure; buildings, bridges, and concrete water and sewer pipes need to be retrofitted to sustain the increasing loads. A common solution is increase the capacity of thesestructures to carry loads by the introduction… More

"Recently, significant attention has been paid to the country's dilapidated infrastructure; buildings, bridges, and concrete water and sewer pipes need to be retrofitted to sustain the increasing loads. A common solution is to increase the capacity ofthese structures to carry loads by the… More

"Primary ballistic protection offered against small arms rounds is mostly based on ceramic with fiber reinforced backing. Due to its complex structure and, in general, anisotropic material properties, ballistic personnel armor is very difficult to inspectusing conventional Non Destructive… More

The objective of this Phase II program is to develop a prototype system to nondestructively assess the condition, as per ballistic performance, of the ceramic/FRP Small Arms Protective Inserts (SAPI). Based on the findings and success of Phase I, PACproposes to design, fabricate and demonstrate a… More

The objective of this proposal is to develop a Non-Destructive Inspection (NDI) system for detection of porosity and debonds in the Metal Matrix Composite (MMC) wear surfaces of Tank Track Shoes (TTS). TTS quality must be such that no further inspection isnecessary after it has passed an initial… More

The objective of this Phase I proposal is to present Physical Acoustics Corporation's (PAC) ability to design and develop a reliable,

The objective of this Phase II program is to develop a prototype system to nondestructively detect and assess the presence of porosity in Al/SiC wear inserts in cast Al Tank Track Shoes using eddy current technique. This prototype system should also be capable of detecting the presence of debonds… More

The objective of this Phase II program is to develop a prototype system to detect and evaluate cracking signals in real time under operational conditions from diaphragm couplings in aircraft, in particular those found in the V-22 helicopter. The Phase II project includes extensive data acquisition… More