Maximum acoustic pressure field
Model Description
TOFD is a flexible technique, which relies on a range of mode converted signals to be effective. OnScale combines the capability of accurately simulating mode conversion in arbitrary geometries, with the speed to run large batches of TOFD models, making it an ideal tool for improving inspection setup.
Time of Flight Diffraction finds use in various industries who utilize NDT, from Oil and Gas to power generation. Originally developed for crack sizing, TOFD can also be used for everything from routine screening to corrosion mapping.
Here is a 2D CAD model to simulate a Time of Flight Diffraction (TOFD) inspection of a steel block containing a defect.
Basic Model Schematic
Parametric Variables
The base CAD model was created in Onshape and allows the following design variables to be adjusted. By default defect depth and defect height are added as configuration variables for quick access through the Configuration Panel in Onshape.
| Parametric Variable | Description | Default Value |
|---|---|---|
| defect_dpth | Depth of defect | 7 mm |
| defect_hgt | Height of defect | 4 mm |
| defect_wdth | Width of thickness | 0.2 mm |
| plate_thk | Plate thickness | 15 mm |
Outputs
Here are a list of the types of outputs to expect from this model.
- Acoustic pressure at nodes along receiver
- Maximum acoustic pressure for beam analysis
Post Processor Outputs
Runtime Statistics
| Model size | 561816 elements |
| Solve Time | 11 s (4 CPU) |
| Core Hours | 0.012 |
| Memory Usage | 38 MB |
| Recommended CPU Configuration | 4 CPU |
CAD Project File
The following input files are required to run this model, click here to download the input files:
Download: Time of Flight Diffraction 2D Project
The base CAD model is publicly available to view and copy through Onshape: