Nondestructive Method and Data Analysis for Organic Matrix Composite Leading Edges

ABSTRACT:Highly curved composite aerospace components are very difficult to inspect using the typical inspection techniques available in the factory or maintenance depot, and much less so in the field. This results in designing to accommodate potentially large defects, which results in additional weight and cost. TRI/Austin has teamed with Iowa State Universitys Center for Nondestructive Evaluation (CNDE) to develop nondestructive evaluation (NDE) techniques and analyses suitable for the whole life cycle management of highly curved composite components like leading edges and chines. We will develop NDE techniques and accompanying data analysis to start at production with initial, high capital intensive, high technology inspections. The following inspections at depot and field environments will be analyzed in the light of the original data for the range of inservice issues. Finally, we will use our modeling and experimental expertise to develop defect assessment capabilities. Accurate sizing in plane and in depth, and understanding of local properties in a defect or damage volume, enables better maintenance decisions.BENEFIT:The lack of ability to find and characterize defects in complex geometries leads to conservatism in design and additional weight/lower performance in practice. This capability will enable better design and longer periods between costly inspections in service. We will develop and market a range of NDT systems and softwaqre for production, depot, and in-service use in military and commercial aerospace markets.