TEAM problem 27 - Eddy Current NDT and Deep Flaws
This example demonstrates how MagNet can be used in your NDT/NDE sensor applications. In TEAM Problem 27 "Eddy Current NDT and Deep Flaws", a coil is stationary over a sheet of aluminum that contains a screw hole. Inside of the screw hole, a flaw is to be detected by two Hall effect sensors. The sensors are used to measure the horizontal differential flux density. A snapshot of the model as it appears in MagNet is on the left.
TEAM Problem 27 is solved in MagNet by using the Transient 3D solver. A step waveform is created to power the coil; once the current is shut off, the horizontal flux densities at either end of the screw hole are differenced. The transient solver correctly models induced eddy currents inside the aluminum plate after the current in the coil is turned off. This allows for the calculation of values such as the differential flux density.
A complete definition of this TEAM problem can found here. TEAM is an acronym for Testing Electromagnetic Analysis Methods, which is a community that creates benchmarks to test finite element analysis software.
Results
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Features in Infolytica's software packages
All of Infolytica's software packages come bundled with our Field Sampler. This tool allows the user to sample field values at a point, along a line, along an arc, or a grid. The user can graph the results as a function of position, time or parameterized problem. With the Field Sampler, you do not have to model Hall effect sensors, as described in TEAM problem 27, this tool will act as your sensor. A snapshot of the Field Sampler is on the right.
If you are a maintained user of MagNet or if you are an evaluator of the software you can download this model by clicking here. You may also download the experimental and simulated data for TEAM problem 27 by clicking here.