Implementation of a Digital Image Correlation Interface for the Mechanical Testing of Materials By: Nigel Ray Advisors: Professor Chasiotis Mohammed Naraghi

Digital Image Correlation Measures strains on a structure by comparing images Measures strains on a structure by comparing images Results appear as: Results appear as: Varied Uses Varied Uses

Project Description Add automated contour map generation to existing interface Add automated contour map generation to existing interface Automate tedious process Automate tedious process Simplify process for researchers Simplify process for researchers Use in classroom Use in classroom

Background Original process is two steps, two programs Original process is two steps, two programs Run Digital Image Correlation (DIC) Run Digital Image Correlation (DIC) Open output in TecPlots (other graphing program) Open output in TecPlots (other graphing program)

The Idea Make process two steps, one program Make process two steps, one program Run DIC Run DIC Generate Graphs, within same application Generate Graphs, within same application

Step 1 Graphical User Interface (GUI) Graphical User Interface (GUI) Set up DIC parameters then run DIC program Set up DIC parameters then run DIC program Done last summer Done last summer

New Step 2 Design GUI to display results of DIC Design GUI to display results of DIC Generate contour maps Generate contour maps Show contour map over top images Show contour map over top images

GUI Design Key features – Transparency, Side-by-Side, Simple design Key features – Transparency, Side-by-Side, Simple design

Generate Contours DISLIN – Software used for creating graphs DISLIN – Software used for creating graphs Free (not for commercial use) Free (not for commercial use) Separate Application, called from the GUI Separate Application, called from the GUI

About the Code GUI is written in C++ using Microsoft Foundation Classes (framework) GUI is written in C++ using Microsoft Foundation Classes (framework) Contour generation is written in C# using DISLIN library functions Contour generation is written in C# using DISLIN library functions

Benefits Automated process Automated process One program, not two One program, not two Results on one screen overtop images Results on one screen overtop images No need to buy TecPlot No need to buy TecPlot

Future Work Display multiple contours over different regions Display multiple contours over different regions Optimize DIC algorithm code, (Speed up execution time) Optimize DIC algorithm code, (Speed up execution time)

Acknowledgments NSF – REU NSF – REU Boeing Boeing NASA NASA Max Planck Institute for Solar System Research Max Planck Institute for Solar System Research

Questions?