Finite element and boundary element analysis of electromagnetic nde phenomena by shridhar nath a dissertation submitted to the graduate faculty in partial fulfillment of the requirements for the degree of doctor of philosophy department. A 2d finite element model of the spiral coil emat is developed to calculate the induced eddy current and the lorentz force density inside the steel plate, implemented using the finite element package. Finite element analysis of elastic transient ultrasonic. Part of theelectrical and electronics commons this dissertation is brought to you for free and open access by the iowa state university capstones, theses and dissertations at iowa state. I would also like to acknowledge the use of the boundary element software developed by dr. Numerical modelling can allow the interplay of the various factors to be studied leading to improved experimental design. Finite element analysis of elastic transient ultrasonic wave. In some of the books the electromagnetic ndt is the major topic 10, 11. The paper provides an understanding of eddy current impedance plane responses to a number of defects using 2. Simulation of an electromagnetic acoustic transducer array. Finite element software for structural, fluid, heat transfer, electromagnetic, and multiphysics problems, including fluidstructure interaction and thermomechanical coupling.
The finite element method in electromagnetics wiley. Numerical analysis techniques have been successfully applied to the modeling of electromagnetic fielddefect interactions 1 studies of magnetostatic leakage field and eddy current ndt phenomena have clearly shown that finite element codes can be used effectively for probe design 2 and the simulation of test geometries difficult to replicate in the laboratory 3. Finite element method magnetics femm is an open source finite element analysis software package for solving electromagnetic problems. Infologic design sells and supports the infolytica software for electromagnetic field. Non destructive testing of materials is a method used for the inspection of materials to. Development of a finiteelement model for eddycurrent ndt.
Electromagnetic finite element analysis solenoid systems. Finite element analysis of solenoid coil for deep crack. It is also known as nondestructive examination nde. Development of a finite element model for eddycurrent ndt phenomena. The latest software adds threedimensional mechanical stress analysis. Based on finite element analysis methods, simcenter magnet electric solves static.
Electrical engineering finite element method for electromagnetics antennas, microwave circuits, and scattering applications a volume in the ieeeoup series on electromagnetic wave theory donald g. Many other devices can be modelled, such as ndt and sensors etc. Finite element modeling of a pulsed spiral coil electromagnetic acoustic transducer emat for the testing of plates. A finite element formulation for ultrasonic ndt modeling. Fea analysis includes solutions under static, time harmonic, and transient includes motion conditions to characterize the operation and performance of a device. Computational electromagnetics cem, computational electrodynamics or electromagnetic modeling is the process of modeling the interaction of electromagnetic fields with physical objects and the environment. Field precision, finiteelement simulation software for electromagnetic simulations. The finite element method in electromagnetics, third edition explains the methods processes and techniques in careful, meticulous prose and covers not only essential finite element method theory, but also its latest developments and applications. The finite element method in electromagnetics, 3rd edition. Provides electromagnetic, electric, magnetic field simulation software, force and torque for magnets, motors, transformers, and antennas. Calculix a free finite element program for threedimensional linear and nonlinear structural calculations.
Finite element and boundary element analysis of electromagnetic nde phenomena. Eddy current magnetic field has been widely used in material properties research, industrial testing and other fields. Magneto, a fully integrated 2drs magnetic solver from integrated engineering software puts you on the cutting edge of electromagnetic design. Electric and magnetic field simulation for solidworks and. Finite element method applied in electromagnetic ndte. Parallel algorithms and matrix solvers in finite element field analysis s. It includes anisotropic linear elastic, hyperelastic and viscoplastic material models for static, frequency, buckling and implicitexplicit dynamic calculations. A 2d finite element model of the spiral coil emat is developed to calculate the. Continuity of nonconforming interfaces ensured by mortar finite elements yes. List of finite element software packages wikipedia. Before any machining, the phs parts are characterized by 3ma ndt. J nondestruct eval finite element method applied in electromagnetic ndte.
Since antennas radiate electromagnetic waves, hfworks can readily be used as an antenna design software. Use of the finite element method in simulation and. Employed in a large number of commercial electromagnetic simulation packages, the finite element method is one of the most popular and wellestablished numerical techniques in engineering. A software like ems which employs finite element method or fem can be used to. The program addresses 2d planar and 3d axisymmetric linear. This combination of integral and finite element methods makes the software ideal for analysing mri magnets. Fast electromagnetic analysis in time and frequency domain is of critical importance to the design of integrated circuits ic and other advanced engineering products and systems. Electrical engineering and computer engineering major. The welding residual stresses were measured using the ultrasonic method, a nondestructive stress measurement technique that works based on the acoustoelasticity law. Magnet for solidworks is the foremost 3d electromagnetic field simulator embedded in the industry leading cad software. Oct 28, 2016 an electromagnetic testing inspection is a form of ndt nde inspection with a wide range of applications. This paper presents analytical and finite element modelling fem simulation results of laser generated ultrasonic waves in ss17 4 ph additive manufacturing materials during the cooling process following laser sintering. Finite element calculation of magnetic flux leakage detector.
Domain finiteelement methods for electromagnetic analysis. Ems correctly accounted for the gross nonlinearities in the current to force measurements. The finite element method is adopted to simulate the whole process of electromagnetic acoustic emission in this paper. Element analysis of 3d electromagnetic field in bloom continuous casting mold. Boundary element method compared to finite element method. Flux software, finite elements simulation for eddy current and magnetic testing.
The fem model is based on robust strategy calculation which manages the. Fea applications in ndt, especially in ultrasonography and holedrilling methodology, deserve as well a separate study. Finite element and meshless methods in ndt applications liang xuan iowa state university follow this and additional works at. Pdf the finite element method magnetics femm freeware. Numerical methods for characterizing highspeed interconnects in digital circuits s.
Ems is an electromagnetic field simulation software which calculates fields. Finite element modeling of electromagnetic systems mathematical and numerical tools unit of applied and computational electromagnetics ace dept. Eddy current, nondestructive testing ndt, cracks, finite. Dudley, series editor employed in a large number of commercial electromagnetic simulation packages, the finite element method is one of the most popular and wellestablished numerical techniques in. Simulation of an electromagnetic acoustic transducer array by.
Electromagnetic finite element analysis electrodynamics. The simulation results show that, above voltage loading on the metal plate, the value of the temp around the crack tip can be up to the melting point, which will. Parametric design language apdl software, where its based on. Finite element analysis of elastic transient ultrasonic wave propagation for ndt applications g. Finite element modeling of pulsed spiral coil electromagnetic acoustic transducer emat for testing of plate r.
Daly twodimensional finite element calculations are presented for anomalous leakage fluxes generated by nearside and farside grooves in pipes inspected by magnetic flux leakage anomaly detectors. Finite element and finite difference methods are the most common numerical methods used to solve emat problems. All our software programs incorporate a finite element method fem solver along with a boundary element method bem solver. On the features of electromagnetic finite element analysis software packages a. Combination of electromagnetic measurements and fem. It has been widely used for analysis of electromagnetic fields in antennas, radar. The effects of different voltage on distribution of displacement and temp at the tip of the crack are discussed. Finite element and meshless methods in ndt applications. Solution of inverse problems in electromagnetic ndt using. Ndt activityconsulting in ndtflux software for electromagnetic methods. Finite element calculation of magnetic flux leakage detector signals d. Providing experimental results and comparisons from the authors personal research, electromagnetic modeling by finite element methods supplies techniques to implement fem for solving maxwells equations, analyze electrical and magnetic losses, determine the behavior of electrical machines, evaluate force distribution on a magnetic medium. Finite element analysis fea is a simulation program that can be used alongside traditional testing to analyze the strength of complex structures and systems, determine component behavior, and accurately predict how products will react under structural and thermal loads. This book covers the theory, development, implementation, and application of the finite element method and its hybrid versions to electromagnetics.
Computational electromagnetics cem, computational electrodynamics or electromagnetic modeling is the process of modeling the interaction of electromagnetic fields with physical objects and the environment it typically involves using computationally efficient approximations to maxwells equations and is used to calculate antenna performance, electromagnetic compatibility, radar cross. The finite element analysis fea solves static, frequency domain, and time varying electromagnetic fields. Field precision creates finiteelement software for electromagnetics. Solenoid systems uses ansys maxwell, a state of the art and premium electromagnetic field simulation software for designing and analyzing 2d and 3d electromechanical devices, including solenoids, motors, transformers, sensors and coils. The paper describes the use of the open source electromagnetic finite element software package, femm used to simulate heat exchanger eddy current tube inspection. Solution of 3d eddy current problems by finite elements. Finite element analysis of electromagnetic propagation in an. Infolytica corporation, 2d3d electromagnetic simulation software for magnetic, electric, and thermal analyses. In this paper a comprehensive finite element analysis of electromagnetic acoustic transducer emat is presented. Our software is the only clear choice for applications involving the modeling of space around the device.
Fast time and frequencydomain finiteelement methods for. Finite elements, electromagnetics and design 1st edition. Solves low frequency magnetic, electrostatic, heat flow, and current flow problems on 2d and axisymmetric domains via the finite element method. Integrated engineering software, high performance electromagnetic simulation software. The coil that provides the induced current is five conducting lines connected as shown. Twi uses the abaqus finite element package to conduct stress analysis, predict heat flow and, in particular, to model ultrasound. From boilers, storage tanks and heat exchangers to building or pipeline inspection, electromagnetic testing can detect even the smallest defects. Domain finite element methods for electromagnetic analysis. Ems for ndt nondestructive testing applications blog emworks. The model based approach may also allow a thorough analysis of the effect on pod. Nondestructive testing ndt is a process of examining the material which allows the material to be tested without changing or effecting there specific qualities. Surface acoustic wave saw analysis for ndt applications. Multiphysics simulation tool accelerates electromagnetic. Fea finite element analysis refers to a modelling approach used to investigate.
Electromagnetic radiation and waves simulation hfworks simulates electromagnetic radiation, electromagnetic waves, electromagnetic interference, and electromagnetic compatibility up to millimeter wave frequencies, i. Some papers model emat arrays with the finite element method fem for both electromagnetic and ultrasonic simulations, that is, the implicit finite element software comsol for the electromagnetic simulation and the explicit finite element software abaqus for the ultrasonic simulation 18, 22. Finite element simulation of crack testing system of. Based on finite element analysis software ansys, 3d models of testing sensor system, magnetizing equipment and steel plate disfigurement were established, and the magnetic field distribution of the model was numerically simulated in its electromagnetic field module. Opera assists designers of eddy current and other electromagnetic ndt probes to optimise. Salerno dipartimento di ingegneria elettrica elettronica e dei sistemi. Emworks provides electromagnetic, electromechanical and electrothermal software and simulation tools based on the finite element method. A 3d finite element model was developed for simulation in the electrothermal environment of comsol multiphysics 3. In this work, simulation by finite elements method is realized with aim to. A detailed set of experiments were carried out on the actual actuator and a similar set of analyses were undertaken using the ems magnetostatic electromagnetic finite element analysis software.
Finite element calculation of magnetic flux leakage. Jayakumar ultrasonic measurement section ums, nondestructive evaluation division nded, metallurgy and materials group mmg. Nondestructive testing ndt finding small cracks in metallic materials for safetycritical applications is often achieved using electromagnetic methods. Eddy current is an electromagnetic method used for nondestructive. Field precision creates finite element software for electromagnetics. There are several commercial electromagnetic fea software brands. Eai utilizes infolytica magnet to model and simulate electric machines and electromagnetic devices. Fea is a part of eais design process and supports tuning of a final design. The testing can be used to calculate size, locate the surface and subsurface and flaws. Eddy current is an electromagnetic method used for non destructive.
Development of a finiteelement model for eddycurrent ndt phenomena. Electromagnetic design and analysis specialists since 1978. Adaptive bem and fem meshing increases confidence in electromagnetic simulation results. Emats are useful for noncontact ultrasonic nondestructive testing ndt of metallic materials for detecting defects and measuring thickness. The finite element solver used in opera is optionally available, for design problems where extreme solution. Citeseerx 3d finite element analysis of marine steel plate. Keywords finite element method electromagnetic nondestructive testing mfl eddy current testing emats 1 introduction nondestructive testing and evaluation ndt, nde or. The software package has been used to carry out analyses, give simulation results, and visualize electromagnetic devices and structures relating to ndt.
Magneto provides both boundary element method bem and finite element method fem solvers, so you can select the best analysis method for your application. Nov 01, 2019 download finite element method magnetics for free. Characterization of electromagnetic acoustic transducers using finite elements sadiq thomas, wamadeva balachandran, evans ashigwuike. Many ic structures constitute a very large scale problem in. Finite element analysis of electromagnetic propagation in. Finite element analysis of electromagnetic devices. Fem is a common powerful numerical method for solution of partial differential equations in applications which need to capture local effects.
The finite element method was also employed for modeling of the specimens in order to numerically validate the measurements. Nath, shridhar, finite element and boundary element analysis of electromagnetic nde phenomena 1992. Electromagnetic modeling by finite element methods crc. The inlet and exit boundary conditions associated with the finite element analysis of electromagnetic propagation must be flexible enough to account for reflection of energy which can occur from wall changes inside the guide or from abrupt exit terminations. Synthesizing devices through finite element performance modeling s.
Ndt of metallic materials for detecting defects and measuring thickness. Numerical simulation for cracks detection using the finite elements. Characterization of electromagnetic acoustic transducers. An electromagnetic testing inspection is a form of ndtnde inspection with a wide range of applications. Fea is used in ndt to model the performance of a number of techniques.