Laminated Object Manufacturing-Based Design Ceramic Matrix Composites.

摘要

Tbis report summarizes the significant accomplishments of the Laminated Object Manufacturing Based Design for Ceramic Matrix Composites Program. The overall objective of the twenty-seven month long effort was to further develop LOM based solid freeform fabrication for the rapid design and manufacture of CMC components for DoD applications. Program goals included the development of( 1) a new LOM based design methodology for CMC (2) optimized preceramic polymer CMC material forms specific for LOM processing (3) LOM system upgrades to increase fabrication efficiencies and improve part tolerances / accuracy and (4) demonstration of the combined design methodology and materials and hardware improvements via the rapid design and LOM fabrication of a CMC prototype component. This program was funded through DARPA Contract No.F336l5- 98-C-5 121 administered by the Air Force Wright Laboratory. Program participants included Northrop Grumman Corp. (Prime) Helisys Inc., and the University of Dayton Research Institute (UDRI). The technical approach included tasks in LOM based CMC design methodology development material and LOM system development and methodology demonstration. The demonstration component was an engine exhaust washed high temperature blastshield representative of structures anticipated on future military vertical short takeoff and landing (VSTOL) and low observable (LO) aircraft with shielded exhaust.