Reference curve of fatigue crack growth for ferritic steels under negative r ratio provided by ASME code section XI

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27690%2F17%3A10238666" target="_blank" >RIV/61989100:27690/17:10238666 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1115/1.4034586" target="_blank" >http://dx.doi.org/10.1115/1.4034586</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1115/1.4034586" target="_blank" >10.1115/1.4034586</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Reference curve of fatigue crack growth for ferritic steels under negative r ratio provided by ASME code section XI

Popis výsledku v původním jazyce

Reference curves of fatigue crack growth rates for ferritic steels in air environment are provided by the ASME Code Section XI Appendix A. The fatigue crack growth rates under negative R ratio are given as da/dN versus Kmax. It is generally well known that the growth rates decreases with decreasing R ratios. However, the da/dN as a function of Kmax are the same curves under R = 0, −1, and −2. In addition, the da/dN increases with decreasing R ratio for R &lt; −2. This paper converts from da/dN versus Kmax to da/dN versus ΔKI, using crack closure U. It can be obtained that the growth rates da/dN as a function of ΔKI decrease with decreasing R ratio for −2 ≤ R &lt; 0. It can be seen that the growth rate da/dN versus ΔKI is better equation than da/dN versus Kmax from the view point of stress ratio R. Furthermore, extending crack closure U to R = −5, it can be explained that the da/dN decreases with decreasing R ratio in the range of −5 ≤ R &lt; 0. This tendency is consistent with the experimental data.

Název v anglickém jazyce

Reference curve of fatigue crack growth for ferritic steels under negative r ratio provided by ASME code section XI

Popis výsledku anglicky

Reference curves of fatigue crack growth rates for ferritic steels in air environment are provided by the ASME Code Section XI Appendix A. The fatigue crack growth rates under negative R ratio are given as da/dN versus Kmax. It is generally well known that the growth rates decreases with decreasing R ratios. However, the da/dN as a function of Kmax are the same curves under R = 0, −1, and −2. In addition, the da/dN increases with decreasing R ratio for R &lt; −2. This paper converts from da/dN versus Kmax to da/dN versus ΔKI, using crack closure U. It can be obtained that the growth rates da/dN as a function of ΔKI decrease with decreasing R ratio for −2 ≤ R &lt; 0. It can be seen that the growth rate da/dN versus ΔKI is better equation than da/dN versus Kmax from the view point of stress ratio R. Furthermore, extending crack closure U to R = −5, it can be explained that the da/dN decreases with decreasing R ratio in the range of −5 ≤ R &lt; 0. This tendency is consistent with the experimental data.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

Journal of Pressure Vessel Technology, Transactions of the ASME

ISSN

0094-9930

e-ISSN

—

Svazek periodika

volume 741

Číslo periodika v rámci svazku

PVT-16-1059

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

5

Strana od-do

"Termín neuveden"

Kód UT WoS článku

—

EID výsledku v databázi Scopus

2-s2.0-84993990145