Innovative Interlaminar Mode I and Mode II Fracture Toughness Test Methods for Ceramic Matrix Composites

Period of Performance: 01/01/2015 - 12/31/2015


Phase 2 STTR

Recipient Firm

Materials Research & Design
300 E. Swedesford Rd Array
Wayne, PA 19087
Principal Investigator

Research Institution

Southern Research Institute
757 Tom Martin Drive
Birmingham, AL 35255
Institution POC


It is critical to the safe use of ceramic matrix composite components that information on the fracture toughness of these materials be available in order to allow an assessment of the likelihood for crack growth. Although Military Standards and American Society for Testing and Materials both serve as resources for room and elevated temperature test methods, there are no standards to obtain the interlaminar fracture toughness in CMCs. This proposal seeks to continue the development of a reliable process for measuring the Mode I and Mode II fracture toughness at any temperature for CMC materials. The process includes the selection of the best test method, the specification of the test procedures, the design of the test specimen, and the determination of the fracture toughness from the measured data.