Community Research and Development Information Service - CORDIS

Abstract

Ultrasonic techniques (UT) presently constitute the prevailing non-destructive examination (NDE) technology for detecting physical discontinuities in the bulk of metals. This paper reports on the use of connectionist models to refine UT sizing of pressure vessel welds flaws. Multilayer perceptrons (MLP) models have been implemented to estimate true weld flaw sizes eventually obtained by destructive testing, from NDE measurements and procedures. MLP estimates may achieve significant gains in accuracy of up to 50% over the original sizings. Also, MLP models generalise well across unhomogeneous plates, which were a priori deemed to possess mildly different structural of flaw characteristics.

Additional information

Authors: VARFIS A, JRC Ispra (IT);AUGER J-M, JRC Ispra (IT);DE BOLLIVIER M, JRC Ispra (IT);CRUTZEN S, JRC Ispra (IT)
Bibliographic Reference: Paper presented: EANN 97, Stockholm (SE), June 16-18, 1997
Availability: Available from (1) as paper EN 40375 ORA
Record Number: 199711077 / Last updated on: 1997-09-16
Category: PUBLICATION
Original language: en
Available languages: en