Failure Analysis of Microflawed Ductile Matrix Materials
Abstract
It is shown in this study that linear elastic fracture mechanics techniques do not provide a consistent geometry-independent means of predicting failure in microflawed ductile matrix materials. Several aspects of microflawed material behavior during fracture testing suggest that considerable plastic behavior occurs on the microscale in microflawed materials. It is suggested that limit analysis techniques applied first on the microscale than extended to the macroscale may provide a consistent means of failure prediction. Three- dimensional limit surfaces are developed for several types of microflawed materials. Comparison of these limit criteria with currently available theories and experimental data on microflawed materials in the absence of macroscale notches shows that the proposed theory is valid for smooth material failure predictions. In the current study, several geometries of fracture toughness specimens were used. The material used was ASTM Class 60 pearlitic matrix gray cast iron with type A-1 graphite.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1974
- Accession Number
- AD0780191
Entities
People
- Ronald E. Frishmuth
Organizations
- University of Illinois Urbana–Champaign