| Dr. Kenneth E. Perry1 and Dr. Paul E. Labossiere2, 1Echobio, LLC, 579 Azalea Avenue, Bainbridge Island, WA 98110, 2Mechanical Engineering, University of Washington, 209 Mechanical Engineering Building, Seattle, WA 98195-2600
Phase shifted moire interferometry is used to measure the full field, in-plane strain during tension, bending and compact tension loading of Nitinol test samples. Differences between the global and full field measurements reveal the effects of localized transformation behavior. These observations are used to improve our understanding and guide the development of advanced numerical methods for Nitinol component modeling. Results for several heat treatments of commercially available superelastic Nitinol are presented for the various load and specimen configurations. Lastly, the experimental approach is applied to an actual Nitinol component to demonstrate the opportunities for improved material characterization, numerical modeling and design validation. |