Photoelastic Studies of Internal Stress Distributions of Unidirectional Composites.
Abstract
Two-dimensional photoelastic models were used to determine internal loading- and residual-stress distributions on the transverse cross section of unidirectional composites. The variation of residual stress was determined as a function of post-curing temperature for a room-temperature cured matrix resin. Maximum stresses and strains were determined in the matrix of a unidirectional composite with a 0.50 fiber volume ratio. Prototype composite specimens were made with the same matrix material and the same fiber volume ratio and were cured under the same conditions as the models. The transverse strength of these prototype specimens was predicted satisfactorily from results of model tests for the room-temperature cured specimens. In the case of the post-cured specimens, the predictions were higher than the measured strength. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1980
- Accession Number
- ADA095595
Entities
People
- G. M. Koller
- I. M. Daniel
- T. Niiro
Organizations
- IIT Research Institute