The casting process produces flaws of various types and sizes in turbine blades. each flaw potentially degrades the life of the blade, but for economic reasons many initial flaw classes are permitted on the basis of acceptance criteria developed empirically by engine manufacturers. the problem with… More

Fracture Analysis Consultants (FAC) proposes to develop a 3D, boundary element-based system for detailed stress analysis of composite joints. The FRANC3D system will be able to model bolted and bonded joints of arbitrary geometry, and include clamping and contact stresses from bolts. The… More

The US Navy is working towards providing more reliable estimates of fatigue life to reduce the risk of component failure during flight and to improve repair schedules while reducing costs. Fretting fatigue is seen as one of the controlling factors in the life of aircraft engine components where… More

This Phase I proposal describes the development of three-dimensional, nonlinear structural analysis methods for use in prognosis systems for aerospace, gas turbine, metallic components and component assemblies. Fracture Analysis Consultants Inc (FAC) and Impact Technologies (ITech), with… More

The US Navy is working towards providing more reliable estimates of fatigue life to reduce the risk of component failure during flight and to improve repair schedules while reducing costs. Fretting fatigue is seen as one of the controlling factors in the life of aircraft engine components where… More

This Phase II proposal describes the continued development of three-dimensional, nonlinear structural analysis methods for use in prognosis systems for aerospace, gas turbine, metallic components and component assemblies. In Phase I, Fracture Analysis Consultants Inc. (FAC) demonstrated the… More

ABSTRACT: The Air Force has been placing increased emphasis on probabilistic methods for predictions of design reliability of fracture critical engine components, including metallic turbine engine blades and disks. Current state-of-the-practice for these methods typically include a significant… More

ABSTRACT: Over the past few years, the Air Force has increased the emphasis on probabilistic methods for design reliability predictions of fracture critical engine components, including metallic turbine engine blades and disks. A significant shortcoming and potential source of conservatism of most… More