| Autor: |
Pier Paolo Delsanto, R.D. Huber, Richard B. Mignogna, K.E. Simmonds, R. S. Schechter |
| Rok vydání: |
1997 |
| Předmět: |
|
| Zdroj: |
Ultrasonics. 35:7-16 |
| ISSN: |
0041-624X |
| DOI: |
10.1016/s0041-624x(96)00089-3 |
| Popis: |
Full-field visualization of ultrasound interacting with a material defect allows the dynamic stress (strain) field to be investigated. Many real materials and structures contain defects such as voids, inclusions and cracks throughout their volume which affect the ultrasound propagating past or through the defects. Understanding the interaction of the ultrasound with these defects is critical to interpreting the received signals in an ultrasonic test. A numerical simulation has been developed based on parallel computer processing. The importance of the numerical simulation is in its capability to model very complex geometries and material property variation. However, validation and fine tuning require comparison of the model to experiment. An experimental apparatus permitting visualization and digitization of ultrasound in transparent media is used to obtain images that are compared to images generated using the parallel simulation. The experimental apparatus is based on optical birefringence, i.e. photoelasticity. A description of the experimental apparatus and the model are given, along with images obtained from a glass matrix with a void and two different solid inclusions. The described comparisons appear to be quite good, but are qualitative at the current time. Quantitative comparison of experiment to simulation is the goal of this work. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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