Coupling t-ϕformulation with surface impedance boundary condition for eddy current crack detection

A General Boundary Integral Equation Approach to Eddy Current Crack

Eddy current techniques have been widely used in the NDE inspection of aircraft engine components. Depending on the flaw characteristics and specimen composition, various EC probe designs have been employed to achieve the maximum probability of detection (POD). Traditionally, the effectiveness of a probe design for a given inspection is determined experimentally. In particular, parameterssuch a...

Symmetric Coupling for Eddy Current Problems

Electrical Impedance Imaging Using Eddy Current

Electric impedance imaging is a method of reconstructing spatial distribution of electrical conductivity inside a subject. In this paper, a new method of electrical impedance imaging using eddy current is proposed. The eddy current distribution in the body depends on the conductivity distribution and the magnetic field pattern. By changing the position of magnetic core, a set of voltage differe...

An Impedance Boundary Condition for Computing Beam Coupling Impedances in Complex-shaped Perforated Beam Pipes

The effect of (a huge number of) pumping holes on beam dynamics and stability, described in terms of coupling impedances, is a fundamental issue and has been carefully investigated, both theoretically [1] and experimentally [2]. With the exception of a few very simple pipe geometris, for which the modal expansion of the electromagnetic field is available, beam coupling impedances can be only co...

Modeling and Simulation for Crack Detection in Aluminum Components Using Tone Burst Eddy Current Thermography

Tone Burst Eddy current Thermography (TBET) is a new hybrid, non-contacting, nondestructive evaluation method with a wide range of applications including aircraft. Aircraft can have structural cracks or other defects which can lead to failure. The safe life of structural members can be evaluated by determining the size and orientation of critical cracks. For understanding cracks, fundamental kn...