Ceramic Matrix Composite (CMC) Design Tool and Lifting Code

Rolls-Royce is sponsoring the development of probabilistic multiscale Ceramic Matrix Composite (CMC) design tool and lifing capabilities that can model a variety of CMC architectures and various types of damage including monotonic, cyclic, and time (creep) dependent damage. A specific example to be considered is a five harness satin weave that will be tested and calibrated. Risk assessment capabilities will be also developed. While metal structures, because of their homogeneity and long service history, can be evaluated with a high degree of confidence, the CMC structures do not enjoy a similar confidence; this is partially the result of scatter in the material property data base. Probabilistic multiscale design capabilities will be developed to assess the influence of a number of variables and their property variation on structural performance. We will address the scatter in data and how it affects the computed component life, with the goal of defining the key parameters affecting performance and how it can be impacted. This will yield insight into how to take the best advantage of what CMC materials can offer.