Fatigue lifetime predictions of notched specimens based on the critical distance and stress concentration factors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F24%3APU155031" target="_blank" >RIV/00216305:26210/24:PU155031 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68081723:_____/24:00588164

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S016784422400329X?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S016784422400329X?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.tafmec.2024.104579" target="_blank" >10.1016/j.tafmec.2024.104579</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fatigue lifetime predictions of notched specimens based on the critical distance and stress concentration factors

Popis výsledku v původním jazyce

The theory of critical distances is used for evaluation of effects of notches on load-bearing capacity of notched components under static or cyclic fatigue loading. The theory can also be used to predict the fatigue life of notched components. One of the assumptions for a reliable prediction is that the critical distance is independent of the notch geometry and its stress concentration level. The study shows that the critical distance depends not only on the number of cycles to failure (under fatigue loading), but also on the notch radius. In this case, direct use of the critical distance leads to unreliable predictions. The study quantifies the relation between the model notch (from which the critical distance is determined) and the predicted notch by means of the ratio of their stress concentration factors. The predictions modified by the ratio of stress concentration factors provide results that are in satisfactory agreement with the experimental data. The predictions were made and verified on the basis of fatigue data measured on two stainless steels 1.4306 and 1.4307, and high strength structural steel S690QL. Smooth and notched specimens were tested on an ultrasonic fatigue machine in a symmetrical tension-compression mode. The results were evaluated in the regions of high cycle and very high cycle fatigue.

Název v anglickém jazyce

Fatigue lifetime predictions of notched specimens based on the critical distance and stress concentration factors

Popis výsledku anglicky

The theory of critical distances is used for evaluation of effects of notches on load-bearing capacity of notched components under static or cyclic fatigue loading. The theory can also be used to predict the fatigue life of notched components. One of the assumptions for a reliable prediction is that the critical distance is independent of the notch geometry and its stress concentration level. The study shows that the critical distance depends not only on the number of cycles to failure (under fatigue loading), but also on the notch radius. In this case, direct use of the critical distance leads to unreliable predictions. The study quantifies the relation between the model notch (from which the critical distance is determined) and the predicted notch by means of the ratio of their stress concentration factors. The predictions modified by the ratio of stress concentration factors provide results that are in satisfactory agreement with the experimental data. The predictions were made and verified on the basis of fatigue data measured on two stainless steels 1.4306 and 1.4307, and high strength structural steel S690QL. Smooth and notched specimens were tested on an ultrasonic fatigue machine in a symmetrical tension-compression mode. The results were evaluated in the regions of high cycle and very high cycle fatigue.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20300 - Mechanical engineering

Projekt

<a href="/cs/project/GA21-14886S" target="_blank" >GA21-14886S: Vliv materiálových vlastností vysokopevnostních ocelí na trvanlivost inženýrských staveb a mostů</a><br>

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Theoretical and Applied Fracture Mechanics

ISSN

0167-8442

e-ISSN

1872-7638

Svazek periodika

133

Číslo periodika v rámci svazku

104579

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

„“-„“

Kód UT WoS článku

001273481000001

EID výsledku v databázi Scopus

2-s2.0-85198504888