Stress Field Near Crack Tip: An Experimental Evaluation of the Three Dimensional Variation
Abstract
This report summarizes the results on the project obtained during the two year period. A new special purpose laboratory equipment called the Scattered Light Polariscope has been designed and constructed. The Polariscope system consists of a device for loading the specimen, optical alignment devices for precise positioning of the specimen with respect to the incident light and an imaging system with a video camera, digitizing frame grabber and image processing software. The systems have all been assembled and tested for proper operation. Certain limitations of the current photoelastic equations were performed. Calibration experiments have been performed to determine the reliability of the technique as well as the data interpretation procedures. Results have been obtained on the nature of the stress variation near the tip of a rounded notch and a crack. Significant differences have been demonstrated between the two and three dimensional stress fields. Keywords: Fracture, Scattered light photoelasticity, Three dimensional problems.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 30, 1989
- Accession Number
- ADA217878
Entities
People
- K. Ravi-chandar
Organizations
- University of Houston