Fracture and Fatigue of Bi-Materials
Abstract
This research is directed toward a fundamental understanding of the failure mechanisms of the filamentary composites such as boron/aluminum and graphite/epoxy which are technologically the most important examples of bi- materials. The penultimate objectives of this research are the theoretical foundations and the experimental justifications for a structural design methodology to be used for the design of filamentary composite materials to meet USAF damage tolerance and durability requirements. On a macroscopic scale, the stress analysis of cracks in orthotropic materials and on a microscopic scale, the stress singularity and stress distributions of a crack lying at the interface of a bi-material have been studied. The experimental work has encompassed the compression-compression fatigue of graphite/epoxy laminates with holes, the tensile fracture of uni-directional laminates with circular discontinuities, and the tensile fracture of crossplied laminates with various geometric configurations of discontinuities.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1979
- Accession Number
- ADA214700
Entities
People
- James W. Mar
Organizations
- Massachusetts Institute of Technology