Contact Stress Analysis of Ceramic-to-Metal Interfaces
Abstract
The objective of this proposed 8-month program was to conduct analysis, specimen testing, and data correlation to provide an improved understanding of the local contact conditions that prevail at an interface between ceramic and metal components for gas turbine engines. The program was specifically directed to study contact stresses at the interface between inserted ceramic turbine blades (hot-pressed silicon nitride) and a metal rotor, but the method of analysis, results, and conclusions also provided a better understanding a contact stresses at ceramic-to-metal and ceramic-to-ceramic interfaces for static components. A finite-element stress analysis procedure and structural evaluation technique consistent with the statistical nature of ceramic materials was generated. Specimen testing was conducted to obtain validation of these techniques and provide insight as to possible modifications of stress simulation or fracture prediction criteria. The objective was to develop a design methodology, which will improve on current design methods, thus permitting the design of interface configurations in which strengths more indicative of the inherent strength of ceramic materials can be realized.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 21, 1979
- Accession Number
- ADA074491
Entities
People
- David G. Finger