Determination of Crack Growth Rates From Fracture Data in Rubbery Particulate Composites
Abstract
Crack growth and growth rates are measured in laboratory conditions to derive their relationship to fracture parameters so the reliability of solid rocket motors can be assessed. The manufacturing method, heterogeneity of the material, and high ductility contribute to difficulties in the measurement and analysis process. Different specimen geometries and methods for measuring crack size have been used and are described, each having unique advantages and disadvantages. The crack sizes, once determined, are usually converted to growth rates with secant methods or polynomial methods. Potential sources of error include accurate boundary condition assessment, subjectivity in crack length measurement, and problems with maintaining proper crack growth in biaxial specimens.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 04, 2002
- Accession Number
- ADA410881
Entities
People
- Timothy C. Miller
Organizations
- Air Force Research Laboratory