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Code of practice for the determination of uncertainties in mechanical tests on metallic materials

Objective

Mechanical testing labs (tensile, impact, toughness, fatigue, crack growth ...) are increasingly required to include in their test reports the uncertainties affecting the data they have measured. However, the possibility to indicate the uncertainties for the measured parameters is often made difficult by a number of aspects which are peculiar to the mechanical tests:
- the sample may be destroyed as a consequence of the measurement, so that exact test repetition is impossible,
- several comparison tests have to be performed to get appropriate statistical amount of data (in order to deal with material homogeneity aspects and inherent test measure scatter),
- reference data (from Certified Reference Materials, CRM) rarely exist.
Detailed procedures for the determination of uncertainties in all measured test parameters on metallic materials do not exist.

The aim of UNCERT project is to formulate the procedures for uncertainty evaluation in mechanical tests on metals (code of practice). The procedures will be defined as the best (in terms of cost/benefit criterion) among several existing options, namely theoretical combinations of uncertainties in directly measured quantities derived from instrumentation tolerances, direct comparisons with CRM's, and possible use of statistical methods (e.g. advanced methods based on fuzzy analysis, pattern recognitions ..).

Funding Scheme

CSC - Cost-sharing contracts

Coordinator

ENEL SPA
Address
Viale Regina Margherita, 137
00198 Roma
Italy

Participants (11)

ALSTOM POWER UK LTD.
United Kingdom
Address
Lichfield Road
ST17 4LN Stafford
CENTRO RICERCHE FIAT S.C.P.A.
Italy
Address
Strada Torino 50
10043 Orbassano
EUROPEAN AERONAUTICS DEFENSE AND SPACE COMPANY EADS GIE
France
Address
Boulevard De Montmorency 37
75781 Paris
Fundacion INASMET Asociacion de Investigation Metalurgica del Pais Vasco
Spain
Address
12,Potuetxe
20009 San Sebastián
MITSUI BABCOCK ENERGY LTD*
United Kingdom
Address
Porterfield Road
PA4 8DJ Renfrew
National Physical Laboratory (NPL)
United Kingdom
Address
Queen's Road
TW11 0LW Teddington
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek
Netherlands
Address
501,Laan Van Westenenk 501
7300 AM Apeldoorn
SIEMPELKAMP NUKLEAR- UND UMWELTTECHNIK GMBH & CO.
Germany
Address
45,Siempelkampstra?e 45
47803 Krefeld
Staatliche Materialprüfungsanstalt
Germany
Address
32,Pfaffenwaldring
70569 Stuttgart
Voest-Alpine Stahl Linz GmbH
Austria
Address
3,Voest-alpine Strasse 3
4031 Linz
Volvo Aero Corporation AB
Sweden
Address

461 81 Trollhättan