Computational and Experimental Investigation into Fracture of Brittle Fiber - Brittle Matrix Composite Systems
Abstract
Experimental and computational analyses provided an improved understanding of quasi-static fracture in model composite systems. Constant displacement compression tests using borosilicate glass double cleavage drilled compression test templates provided qualitative assessments of localized toughening for crack growth near cylindrical inclusions. Large crack-tip stress fields induced interfacial slip and separation prior to arrival of the main crack. Debonding and the proliferation of secondary matrix cracks characterized the role of bridging fibers along weak interfaces. Strong residual normal compressive interfacial stresses diminished the influence of crack-tip stresses; however, slip was still observed. VHS tape and computer enhanced photos record a history of crack propagation and interfacial slip. Experimental data was used to validate a fully three-dimensional computational code capable of analyzing fracture near and around cylindrical inclusions. Consistent variations in the shape of the crack periphery renders confidence in the elasticity solution.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1992
- Accession Number
- ADA258913
Entities
People
- James P. Solti
Organizations
- Air Force Institute of Technology