Menu

CMC Coordination Group

Minimize

Vision
CMH-17 is the primary and authoritative source for characterization and statistically-based property and performance data of current and emerging advanced ceramic matrix composites. It reflects the best available data and methodologies for characterization, testing, analysis and design, and includes data development and usage guidelines in support of design methodologies for components.

Goals

 

  • A framework for the successful use of CMCs.
  • Guidance to industry for the collection of statistically meaningful critical data that designers need to utilize CMCs.
  • Appropriate prioritization of property requirements and broadly accepted testing procedures - including a consideration of the designation of the precision level, based on the requirements from the design community.
  • Guidelines and recommendations for the characterization, processing, testing, design, and utilization of ceramic matrix composite materials and structures.
  • The primary and authoritative source for characterization, property, and performance data of current and emerging ceramic matrix composite systems.
  • Recommendations for the statistical analysis of materials data and structures reliability.

 

Objectives

  • Development of a framework for the future, successful use of CMCs.
  • Provide guidance to industry for the collection of statistically meaningful critical data that designers need to utilize CMCs.
  • Based on the requirements from the design community, identify appropriate properties and broadly accepted testing procedures - including a consideration of the designation of the precision level and prioritization of properties required.
  • Provide guidelines and recommendations for the characterization, testing, design and utilization of ceramic matrix composite materials and structures.
  • Provide the primary and authoritative source for characterization, property, and performance data of current and emerging ceramic matrix composite systems.
  • Provide recommendations for the statistical analysis of materials data and structures reliability.

CMH-17 Coordinators

CMH-17 CMC Coordinator and CMC Co-Chair  
Mr. Curtis R. Davies
Consultant
Tel: 609-705-8365
Email: curtdavies@verizon.net 

CMC Co-Chair
Ms. Cindy Ashforth 
FAA  Aircraft Certification Services, Policy, and Innovation Division  
2200 S. 216th Street
Des Moines, WA 98198
Tel: 206-231-3239
Email: cindy.ashforth@faa.gov

The CMC Coordination Group is responsible for Volume 5 of the Handbook, Ceramic Matrix Composite Materials. The volume is pending publication. A top-level outline of the volume is given below.



Part A. Introduction and Guidelines

  • CMH-17 Guidelines and Procedures
  • Introduction, History and Overview
  • Processing, Characterization, and Manufacturing
  • Quality Control of Final Products
  • Applications, Case Histories, and Lessons Learned

Part B. Design and Supportability

  • Design and Analysis
  • Supportability

Part C. Testing

  • Thermo-Mechanical-Physical Test Methods, Overview
  • Material Testing & Characterization for Submission of Data to CMH-17
  • Evaluation of Reinforcements
  • Evaluation of Matrix Materials
  • Evaluation of Interface Materials
  • Evaluation of Composites
  • Subcomponent Testing
  • Machining and Grinding
  • Statistical Methods

Part D. Data Requirements and Data Sets

  • Data Submission, Format, and Requirements
  • CMC Property Data

Appendix A. Typical CMC Data

Appendix B. Derivation of the Residual Strength Reduction Expressions for LCF and Rupture Loadings