Photoelastic Analysis of Shrinkage Stresses and Its Application to the Micromechanics of Composites.
Abstract
A review of progress over the past 20 years in the development of photoelastic methods to determine the stresses and strains caused by restrained shrinkage in multimaterial bodies and in particular in composites demonstrates that the photoelastic method has been developed into a viable method for both two-dimensional and three-dimensional analysis of stresses caused by restrained shrinkage. The method has been used to solve a number of important problems and presumably will be used to solve more. Three-dimensional photoelasticity is generally applied to the microanalysis of shrinkage stresses in composite materials subjected to slow curing or slow thermal changes. Two-dimensional photoelastic analysis of composites is seen to be hampered by an inherent condition called pinching, which restricts the analysis to regions away from the interfaces of the composite material. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 12, 1975
- Accession Number
- ADA016880
Entities
People
- Vincent J. Parks
Organizations
- United States Naval Research Laboratory