Fracture and Longevity of Composite Structures
Abstract
The results of several investigations into the fracture and longevity of composite structures are reported. During this year, the work has concentrated on the phenomena of delamination and final failure. Work is reported on the initiation of delamination under tensile and compressive loading. Work on the growth of delamination and the final failure of the specimen under tensile load is also reported. The primary objective of this ongoing research continues to be to gain understanding of the fundamental mechanisms involved in the failure of filamentary composite materials so that the methodologies for predicting fracture and longevity can be developed and enhanced. In addition, via this research, needed data bases can be identified and partially provided. This latter objective does not imply the establishment of the data base within the scope of this effort. Rather, through both analysis and directed experimentation, the critical parameters can be identified and studied in order to gain an understanding of the fundamental fracture and damage mechanisms of composites so that proper engineering data bases and methodologies can be established. Delamination plays an important role in the failure of composite structures. Interlaminar stresses which arise in gradient fields can trigger the failure of the interply resin layer. (KR)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1988
- Accession Number
- ADA217827
Entities
People
- Paul A. Lagace
Organizations
- Massachusetts Institute of Technology