Microscopic Flow and Failure Processes in Polymer Glasses.
Abstract
In the aerospace industry, polymeric glasses are utilized in extreme service environments. The need to predict the durability of these materials over long periods without resorting to empiricism requires a detailed understanding of the microscopic flow and failure processes in these glasses and how these processes are modified by the service environment. Flow occurs in polymer glasses either microscopically via crazing or shear banding or macroscopically via necking. This flow absorbs energy during the failure process and enhances the toughness of a polymer glass. The strains in shear bands and crazes similar, and it is uncertain which structural parameters determine if one mode of deformation predominates in a given set of stress-time-temperature conditions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1977
- Accession Number
- ADA054915
Entities
People
- James E. O'neal
- Roger J. Morgan