LOW CYCLE FATIGUE TESTS WITH THE USE OF MINIATURIZED TEST SPECIMENS

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F17%3AN0000137" target="_blank" >RIV/26316919:_____/17:N0000137 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1115/PVP2017-66174" target="_blank" >http://dx.doi.org/10.1115/PVP2017-66174</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1115/PVP2017-66174" target="_blank" >10.1115/PVP2017-66174</a>

Jazyk výsledku

angličtina

Název v původním jazyce

LOW CYCLE FATIGUE TESTS WITH THE USE OF MINIATURIZED TEST SPECIMENS

Popis výsledku v původním jazyce

Determination of mechanical properties with the use of sub-sized specimens is topic a high interest nowadays. The application of the sub-sized samples is quite wide for all cases where only limited amount of the experimental material is available such as evaluation of additively manufactured products properties, residual life of in-service components, properties determination of developed nano-structured materials, assessment of dilatometric samples used for thermal and thermo-mechanical treatment development, local properties of components, weld joints and so on. Concerning this large application field it would be very useful to prepare standard for small size samples especially for the most demanded material properties: tensile properties, notch impact transition temperature, fatigue properties, fracture toughness and creep. Current paper is going to deal with the low fatigue (LCF) properties assessment with the use of miniaturized specimens'. There were proposed specimen geometries with the use of FEM analysis and testing procedures for considered mini-specimens tests were developed. In the case of strain controlled LCF tests, contactless testing system had to be established for testing of small sized specimens, where it is not possible to apply standard mechanical extensometers for test control. Moreover, LCF procedure for high temperature tests was also successfully established here. The LCF results were subsequently used for Manson-Coffin parameters determination. Results of low cycle tests for several steels are confronted with the results of standard sized specimens with very good agreement for all considered conditions.

Název v anglickém jazyce

LOW CYCLE FATIGUE TESTS WITH THE USE OF MINIATURIZED TEST SPECIMENS

Popis výsledku anglicky

Determination of mechanical properties with the use of sub-sized specimens is topic a high interest nowadays. The application of the sub-sized samples is quite wide for all cases where only limited amount of the experimental material is available such as evaluation of additively manufactured products properties, residual life of in-service components, properties determination of developed nano-structured materials, assessment of dilatometric samples used for thermal and thermo-mechanical treatment development, local properties of components, weld joints and so on. Concerning this large application field it would be very useful to prepare standard for small size samples especially for the most demanded material properties: tensile properties, notch impact transition temperature, fatigue properties, fracture toughness and creep. Current paper is going to deal with the low fatigue (LCF) properties assessment with the use of miniaturized specimens'. There were proposed specimen geometries with the use of FEM analysis and testing procedures for considered mini-specimens tests were developed. In the case of strain controlled LCF tests, contactless testing system had to be established for testing of small sized specimens, where it is not possible to apply standard mechanical extensometers for test control. Moreover, LCF procedure for high temperature tests was also successfully established here. The LCF results were subsequently used for Manson-Coffin parameters determination. Results of low cycle tests for several steels are confronted with the results of standard sized specimens with very good agreement for all considered conditions.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/TH02020448" target="_blank" >TH02020448: Posuzování provozuschopnosti zařízení s využitím miniaturních zkušebních těles</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

PROCEEDINGS OF THE ASME PRESSURE VESSELS AND PIPING CONFERENCE, 2017, VOL 1A

ISBN

978-0-7918-5790-8

ISSN

—

e-ISSN

—

Počet stran výsledku

6

Strana od-do

nestránkováno

Název nakladatele

The American Society of Mechanical Engineers

Místo vydání

New York, USA

Místo konání akce

Waikoloa, Hawaii

Datum konání akce

16. 7. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000422810300072