HOLLOW CERAMIC MATRIX COMPOSITE ARTICLE, MANDREL FOR FORMING HOLLOW CERAMIC MATRIX COMPOSITE ARTICLE, AND METHOD FOR FORMING HOLLOW CERAMIC MATRIX COMPOSITE ARTICLE

摘要

A hollow CMC article (100), a mandrel (200) for forming the article (100) and a method for forming the article (100) are disclosed. The article (100) includes a ply-wrap layer (102) defining a cavity (104). The ply-wrap layer (102) includes a first face (106), a second face (108), a root portion (110) bridging the faces (106 and 108), and a plurality of CMC wrap plies (112). The root portion (110) defines a terminus (114) of the ply-wrap layer (102) including a cross-sectional conformation (116) consisting of a curve (118) having a single turning point (120). Each of the plurality of CMC wrap plies (112) are disposed along the first face (106), wrap over the root portion (110), and extend along the second face (108). The hollow article (110) further includes a plurality of CMC lateral plies (122) disposed along the faces (106 and 108).