Effect of Humidity on the Thermoacoustic Behaviour of Oxide-Oxide Ceramic Plates
Abstract
This proposal builds on earlier successful research programs funded by AFOSR and EOARD on the thermoacoustic behaviour of metallic plates performed by Lambros and Patterson working together, as well as recent work by Patterson and Przybyla working together on characterisation of microstructures in ceramic matrix composites (CMCs). We propose to integrate and extend this research to observe, quantify, understand and model the thermoacoustic response of Oxide-Oxide CMCs under both dry and moist conditions. The type and level of coupling that occurs between the influence of thermal, mechanical and humidity is an open question which will be addressed by observing the effects of these factors at the macroscale, understanding the underlying physics though laboratory-scale experiments and constructing an appropriate continuum-level damage model to predict performance degradation. A three-year integrated program of research at the Universities of Liverpool and Illinois Urbana-Champaign working closely with AFRL is proposed whose outputs will include- a unique facility for thermoacoustic excitation in condition of known relative humidity; mode shapes, frequencies and time-frequency spectrograms for asymmetric heating in humid conditions; identification of damage mechanisms due to combined mechanical, thermal and humidity conditions; and development of continuum damage model to predict structural and failure responses in these conditions.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 06, 2024
- Source ID
- FA95502310552
Entities
People
- John Lambros
Organizations
- Air Force Office of Scientific Research
- United States Air Force
- University of Illinois Urbana–Champaign