Small punch test of ferritic-martensitic steel P92 at constant deflection

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F15%3A00449791" target="_blank" >RIV/68081723:_____/15:00449791 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Small punch test of ferritic-martensitic steel P92 at constant deflection

Popis výsledku v původním jazyce

New application of the Small Punch Test (SPT) [1] can be employed as the stress relaxation testing at elevated temperatures. The disc specimen has to be loaded at a given deflection rate to a specific central deflection that conforms to conditions of themembrane-stretching regime. The deflection of the disc is then held constant and the force relaxes as the elastic strain is replaced with inelastic creep strain. This test at constant deflection can be marked as SPT-CD. The force vs. time response during relaxation can be recalculated to stress vs. time response, differentiated and divided by elastic modulus to obtain the creep rate and finally its dependence on the stress. The process of the disc deformation and the stress relaxation is possible to model using the Finite Element Method (FEM). Two basic SPT setups were already modeled: i) SPT at constant force (SPT-CF), i.e. certain analogy to the creep test [2] and ii) SPT at constant deflection rate (SPT-CDR), i.e. an analogy to tens

Název v anglickém jazyce

Small punch test of ferritic-martensitic steel P92 at constant deflection

Popis výsledku anglicky

New application of the Small Punch Test (SPT) [1] can be employed as the stress relaxation testing at elevated temperatures. The disc specimen has to be loaded at a given deflection rate to a specific central deflection that conforms to conditions of themembrane-stretching regime. The deflection of the disc is then held constant and the force relaxes as the elastic strain is replaced with inelastic creep strain. This test at constant deflection can be marked as SPT-CD. The force vs. time response during relaxation can be recalculated to stress vs. time response, differentiated and divided by elastic modulus to obtain the creep rate and finally its dependence on the stress. The process of the disc deformation and the stress relaxation is possible to model using the Finite Element Method (FEM). Two basic SPT setups were already modeled: i) SPT at constant force (SPT-CF), i.e. certain analogy to the creep test [2] and ii) SPT at constant deflection rate (SPT-CDR), i.e. an analogy to tens

Druh

O - Ostatní výsledky

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

<a href="/cs/project/ED1.1.00%2F02.0068" target="_blank" >ED1.1.00/02.0068: CEITEC - central european institute of technology</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

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