Review of Progress in Quantitative Nondestructive Evaluation
Vibrothermography is a nondestructive technique for finding defects through vibration‐induced heating imaged with an infrared camera. To model the crack heating process in Vibrothermography, it is essential first to understand the vibration that causes heat generation. We describe a method for calculating internal motions from surface vibrometry measurements. A reciprocity integral and Gauss's law allow representation of internal motion by a surface integral of boundary motion times the Green's Function. We present experimental results showing internal motions calculated from measured surface motions of a vibrating sample. This will ultimately allow estimation of the detectability of a hypothetical crack at an arbitrary location in a specimen.
American Institute of Physics
Renshaw, Jeremy Blake and Holland, Stephen D., "Full-field Vibration Measurement for Vibrothermography" (2007). Aerospace Engineering Conference Papers, Presentations and Posters. 9.