Nondestructive Evaluation of Fatigue Damage on Steels using Magnetic Techniques

In many cases, where a high reliability is demanded, such as in nuclear power plants or civil engineering structures, steel components are subject to fatigue damage. The possibility of nondestructively assessing this damage would thus be of great interest, especially in order to evaluate the remaining lifetime and the point when the risk of failure becomes too important.</p

Groupe de travail COFEND sur la simulation des END par courants de Foucault – Bilan d'activités

National audienceAs an answer to one of the main concerns expressed by the attendees of the first COFREND technical meeting on eddy current NDE simulation held on October 19, 2004, the "eddy current modelling" COFREND Working Group has oriented its activities towards the definition and resolution of benchmark problems, starting from the beginning of 2005.The aim of the Working Group is to define benchmark problems representative of actual industrial issues and uncovered by existing benchmarks. The proposed problems must, as much as possible, be simple (an exact description of the actual industrial problem is not advised) and have complete and accessible descriptive and experimental data. They are meant to be granted a public access and to be open to a resolution by any applicant code.At the present time, the Working Group has defined 4 benchmarks inspired by issues from aerospace and nuclear industries, as well as from laboratory trials, and is studying other proposals. The first resolution examples are presented for two of them, implying both finite element and semi-analytic codes.En réponse à l'une des préoccupations exprimées par les participants à la première journée technique de la COFREND sur la simulation des END par courants de Foucault, le 19 Octobre 2004, le groupe de travail COFREND "modélisation courants de Foucault" a orienté ses activités vers la définition et la résolution de cas-tests (ou "benchmarking") à partir de début 2005.L'objectif du groupe de travail est de définir des cas-tests représentatifs de problématiques industrielles non couvertes par les cas-tests connus de la bibliographie. Les problèmes proposés doivent autant que possible être relativement simples (la description exacte du problème industriel n'est pas recommandée) et disposer de données descriptives et expérimentales complètes et accessibles. Ils ont pour but d'être rendus publics et ouverts à la résolution de tout code de calcul candidat.Actuellement, le groupe de travail a défini 4 cas-tests inspirés de problématiques issues des industries aéronautiques et nucléaires, ainsi que d'essais de laboratoire, et il étudie d'autres propositions. Des premiers exemples de résolution sont présentés pour deux d'entre eux, en utilisant des codes faisant appel aux éléments finis et aux méthodes semi-analytiques

Multi-domain industrial benchmarks for eddy-current modelling: the COFREND working group

9 pagesInternational audienceDescription of the COFREND working group dedicated to the multi-domain industrial benchmarks for eddy-current modelling and some of their configurations

Nondestructive Evaluation of Fatigue Damage on Steels using Magnetic Techniques

In many cases, where a high reliability is demanded, such as in nuclear power plants or civil engineering structures, steel components are subject to fatigue damage. The possibility of nondestructively assessing this damage would thus be of great interest, especially in order to evaluate the remaining lifetime and the point when the risk of failure becomes too important.</p

Multi-domain industrial benchmarks for eddy-current modelling: the COFREND working group

9 pagesInternational audienceDescription of the COFREND working group dedicated to the multi-domain industrial benchmarks for eddy-current modelling and some of their configurations