CRAZING AND YIELDING OF REINFORCED COMPOSITES.
Abstract
Compression tests were performed on the three program resin systems; ERRA 0300/MPDA, EPON 828-1031/BDMA-MNA, and ERL 4221/HHPA-EMPOL 1022 in order to accurately determine their stress-strain characteristics throughout the elastic and plastic range. The flaw distribution theory for predicting unidirectional tensile strength was found to agree very accurately with published test results. A strength analysis for the general multi-layer, oriented filament composite has been formulated and programmed based upon the distortional energy failure criterion utilized by Tsai. It has been refined, however, to account for the differences in tensile and compressive properties encountered in fibrous composite materials. Expressions are also presented which pertain to the effects of thermal residual stresses and voids on the strength performance of the basic unidirectional layer. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1966
- Accession Number
- AD0804327
Entities
People
- B. H. Jones
- J. V. Noyes
- L. A. Hernandez
Organizations
- Douglas