Developments in efficiently modelling eddy current testing of narrow cracks

被引：23

作者：

Theodoulidis, Theodoros ^{[1
,2
]}

机构：

[1] Univ Western Macedonia, Dept Mech Engn, Bakola 50100, Kozani, Greece

[2] Univ Western Macedonia, Dept Mech Engn, Sialvera 50100, Kozani, Greece

来源：

NDT & E INTERNATIONAL | 2010年 / 43卷 / 07期

关键词：

Boundary element method; Discrete complex image method; Eddy current testing; Generalized pencil of function method; Narrow crack model; Sommerfeld integrals; FORM GREENS-FUNCTIONS; IDEAL CRACK;

D O I：

10.1016/j.ndteint.2010.06.003

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Further developments in a Boundary Element Method model for eddy current inspection of ideal or narrow cracks are presented. First, the required Green's function is rapidly computed in the spatial domain using the concept of discrete complex images. The approach is based on the analytical evaluation of the Sommerfeld type Integrals through the use of the Generalized Pencil of Function method. Computation times are recorded in order to show the remarkable reduction in the moment matrix fill time as well as in the total computational time. Second, the model is extended to arbitrary crack depth profiles. Theoretical results are compared to published benchmark measurements of the coil impedance change due to a semi-elliptic and an epicyclic crack and excellent agreement is achieved. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：591 / 598

页数：8

共 19 条

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