Linking Coupon to Component Behavior of CMCs in Relevant Service Environment

ABSTRACT:Innovative research and development leading to a dual-use advanced technology product is proposed. The product is a methodology and associated software for CMC component analysis under aircraft engine hot-section service loading and environmental conditions using coupon test data as input to models. SAI proposes to further develop and validate a mechanistic damage-based non-linear deformation model that SAI has been developing under prior Air Force programs to make it suitable for CMC component analyses under service loading and environment conditions and non-uniform fiber structures. Once developed and validated, the methodology would be used in cost effective development of CMC components by the Air Force and its major suppliers. The proposed methodology would be applicable to a broad class of CMCs and components for military and commercial applications. The approach includes direct consideration of relevant defect and damage mechanisms. Phase I will include characterization and modeling of existing CMC data obtained from Roll-Royce Corporation and the Boeing Company (our industry endorsers). The models will be validated against experimental data from sub-element and feature specimens relevant to CMC components. Predictions will be compared with experimental measurements to assess the modeling approach and feasibility for a comprehensive methodology development in Phase II. BENEFIT:Due to the proliferation in potential applications of ceramic matrix composites in military and commercial aerospace engines, and in industrial gas turbine and nuclear industries, the proposed dual-use high technology product has an immediate and expanding market. Potential customers would include Rolls-Royce, Pratt and Whitney, General electric Aerospace, the Boeing Company, Solar Turbines, Inc. and General Atomics. SAI will market the methodology, the software and technical expertise (services) to these and other industries.