|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Fracture Properties and Residual Stresses in Small Dimensions
||Fracture Toughness of Beryllium Using Insitu X-ray and Digital Image Correlation Techniques
||Carl M Cady, Cheng Liu, George T Gray, Neil K Bourne
|On-Site Speaker (Planned)
||Carl M Cady
The primary reason for this investigation was to measure the fracture toughness on beryllium and observe crack growth using in-situ an x-ray characterization technique and digital image correlation. The fracture toughness was evaluated by using a “compression-fracture” introduced by Sammis and Ashby. Two experimental techniques were used to captured deformation and damage. An in-situ x-ray tomography technique was used for the internal fracture processes and digital image correlation for the surface evaluation. The development of technique to evaluate strain fields using linear elastic fracture mechanics provides consistent results that are typical of the standard fracture toughness evaluation. Further development in the characterization using continuum mechanics has led to a solution that more closely resembled the standard compact tension problem. In this solution we have been able to extract the modulus values and Poisson’s ratio form the experimental analysis and make corrections to the solution that minimizes errors.