Fatigue of Polymers and Organic Composites.
Abstract
This project is concerned with detailed experimental investigations of cyclic damage evolution and of the development of cyclic plastic' zones ahead of fatigue cracks in polymers subjected to cyclic compression and cyclic tension-compression loads. The implications of such cyclic damage will be examined for a variety of fatigue phenomena including crack closure and variable amplitude fatigue. The fundamental studies will include transmission electron microscopy of near-tip deformation and damage, laser interferometry and quantitative photoelasticity on model systems for a wide range of mechanical loading conditions (i.e., frequency, load ratio, and tension and/or compression cycling). The information derived from the experimental program will also be used to develop conceptual and quantitative life prediction models including reliability analyses. Another major extension of the proposed work will be to experimentally document of cyclic near-fields for a fatigue crack perpendicularly approaching a metal-polymer bimaterial interface and to determine the conditions for the continued advance, acceleration or arrest of the crack as a result of crack-tip/interface interactions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1993
- Accession Number
- ADA299719
Entities
People
- S. Suresh
Organizations
- Brown University