Computational Method for Crack Reconstruction of Steam Generator Materials using FEM-BEM Scheme in Inverse Applied Electromagnetics.

Fast multipole method applied to elastostatic BEM-FEM coupling

BEM-FEM coupling is desirable for three-dimensional problems involving specific features such as (i) large or unbounded media with linear constitutive properties, (ii) cracks, (iii) critical parts of complex geometry requiring accurate stress analyses. However, for cases with a BEM discretization involving a large number NBEM of degrees of freedom, setting up the BEM contribution to the coupled...

Sound Source Reconstruction Using Inverse BEM

Sound source reconstruction based on boundary element modelling (BEM) and inverse methods has become a powerful tool for noise source identification involving arbitrarily shaped sources. Since the numerical treatment results in a linear discrete ill-posed problem, regularisation must be applied to avoid unstable solutions dominated by noise and errors in the acoustic field data. The key to a us...

BEM for crack-hole problems in thermopiezoelectric materials

The boundary element formulation for analysing interaction between a hole and multiple cracks in piezoelectric materials is presented. Using Green’s function for hole problems and variational principle, a boundary element model (BEM) for a 2-D thermopiezoelectric solid with cracks and holes has been developed and used to calculate stress intensity factors of the crack-hole problem. In BEM, the ...

Simulation of electrical machines - A FEM-BEM coupling scheme

Electrical machines commonly consist of moving and stationary parts. The field simulation of such devices can be very demanding if the underlying numerical scheme is solely based on a domain discretization, such as in case of the Finite Element Method (FEM). Here, a coupling scheme based on FEM together with Boundary Element Methods (BEM) is presented that neither hinges on re-meshing technique...

A Combined BEM/FEM Method for IC Substrate Modeling