Fracture behavior Prediction for Rapidly Loaded Surface Cracked Specimens
Abstract
The feasibility of predicting the fracture behavior of surface cracks from shallow cracked bend specimens was investigated. The material studied was a high strength steel stress relief embrittled to various levels of Charpy-V notch impact toughness. Material toughness was quantified in terms of the J-integral at total specimen failure (JCRIT), using both deeply notched and shallow notched bendbars (SE(B)) dynamically loaded in a drop tower impact testing machine. These data were compared to the fracture behavior of rapidly pressure loaded part-through surface cracked bend PS(B) specimens, which had a shallow surface flaw introduced at the specimen midspan. For highly embrittled material (Charpy V-Notch Energy (CVE) between 10 J and 24J), JCRIT values measured using shallow crack SE(B) specimens were consistently higher than deep crack JCRIT values due to the shorter crack size, as well as increased plastic energy dissipation within the specimen.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1988
- Accession Number
- ADA221125
Entities
People
- E. M. Hackett
- M. T. Kirk