The multi-task objectives of the plan discussed in this proposal are: research the role and effects of fretting on structural life of components, develop and demonstrate the feasibility of integrating candidate fretting fatigue predictive analytic model(s)into structural integrity methods, integrate… More

"Fretting is a wear phenomenon that occurs between two mating surfaces: it is adhesive in nature, and vibration is its essential causative factor. Usually fretting is accompanied by corrosion. In general, fretting occurs between two tight fitting surfacesthat are subjected to a cyclic, relative… More

"Fretting is a wear phenomenon that occurs between two mating surfaces: it is adhesive in nature, and vibration is its essential causative factor. Usually fretting is accompanied by corrosion. In general, fretting occurs between two tight fitting surfacesthat are subjected to a cyclic, relative… More

This proposal offers an approach to integrate the latest corrosion sensor technology with corrosion structural effects modeling to enable the transition from periodic corrosion inspections to an efficient, focused prognostics and health monitoring (PHM) system. The fundamental vision of the… More

This proposal offers the demonstration of an approach to integrate the latest corrosion sensor technology with corrosion structural effects modeling to enable the transition from periodic corrosion inspections to an efficient, focused prognostics and health monitoring (PHM) system. The fundamental… More

The USAF recognizes that benefits to cold working fastener holes include significantly increased life of a structure subjected to fatigue loading. However, full realization of this potential from a maintenance and engineering standpoint is hindered by the fact that there is currently no adequate… More

The proposed approach for Phase I of this effort brings together two key items that are needed to work in concert with one another: advanced fatigue assessment methods and non-destructive inspection & detection techniques. Successful synthesis of these elements and the engineering disciplines behind… More

The USAF recognizes that benefits to cold working fastener holes include significantly increased life of a structure subjected to fatigue loading. However, full realization of this potential from a maintenance and engineering standpoint is hindered by the fact that there is currently no adequate… More