Open AccessFracture toughness (K{sub IC}) data reduction program
Author(s) -
M.R. Heiman
Publication year - 1998
Language(s) - English
Resource type - Reports
DOI - 10.2172/663569
Subject(s) - data reduction , reduction (mathematics) , ascii , data file , computer science , automation , data acquisition , fracture toughness , database , programming language , engineering , materials science , data mining , mechanical engineering , mathematics , metallurgy , geometry
This report documents the development, verification, and use instructions for an automated K{sub IC} data reduction program written in the Hewlett Packard Visual Engineering Environment (HP VEE) programming language. Currently, when the standard test method Plane-Strain Fracture Toughness of Metallic materials (K{sub IC}), is performed, the data is reduced manually. Date reduction includes 15 detailed calculations required by the American Society for Testing and Materials (ASTM) E399 to determine the validity of the computed K{sub IC} value. Manual data reduction is both time consuming, tedious, and prone to errors. Since all K{sub IC} tests are completed using a data acquisition system to digitally record time, load, and crack opening displacement (COD); automation of K{sub IC} data reduction using a computer program to perform all calculations rapidly, enables processing of a large amount of data. The K{sub IC} data reduction program reduces any computer American Standard Code for Information Interchange (ASCII) data file. Thus, the K{sub IC} data reduction program is also used to over check tests performed at other facilities. The program was qualified based on mechanical properties of commercial alloy specimens