Use of the finite element method in simulation and visualization of electromagnetic nondestructive testing applications

This paper presents examples of applications in which commercial software h as been used to gain a better understanding of the magnetic particle and ed dy current testing methods of NDT. The software package has been used to ca rry out analyses, give simulation results, and visualize electromagnetic de vices and structures relating to NDT. The software is based on 2D and 3D fi nite element method (FEM). A brief description of the method is given. The electromagnetic fields illustrated include static magnetic fields and dynam ic electromagnetic field illustrated include static magnetic fields and dyn amic electromagnetic field (eddy current) systems. A number of applications are described to provide an understanding of how both simulation and visua lization are achieved. The applications illustrated include pipeline inspec tion, crack detection, and weld inspection. In addition, tests used in the quality assurance of the magnetic particle suspension fluid widely used in NDT may be simulated to confirm that particle performance is of a suitable standard.