At last year QNDE, we have presented our finite-element study of the vibration and heating in aluminum and titanium to investigate the effects of their different material properties. In the models, we allow both friction and plastic deformation as sources of heating. We have continued our investigation on the correlation of vibration behavior and heat generation in cracks to gain comprehensive understanding in crack heating mechanism in Sonic IR Imaging. With the experimental vibration measurements and infrared signals as references, we have been developing FEA models for surface cracks, subsurface cracks and edge cracks with different geometries. This research provides us a mean for model-based study on predicting Sonic IR detectability of defects in materials.
Review of Progress in Quantitative Nondestructive Evaluation
- Pub Date:
- March 2009
- Nondestructive testing: ultrasonic testing photoacoustic testing;
- Nondestructive testing: optical methods;
- Finite-element and Galerkin methods