Finite Element Analysis of Crack-tip Opening Displacement and Plastic Zones Considering the Cyclic Material Behavior

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F19%3APU135635" target="_blank" >RIV/00216305:26620/19:PU135635 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2452321620302079" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2452321620302079</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.prostr.2020.01.140" target="_blank" >10.1016/j.prostr.2020.01.140</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Finite Element Analysis of Crack-tip Opening Displacement and Plastic Zones Considering the Cyclic Material Behavior

Popis výsledku v původním jazyce

Propagation and behavior of fatigue cracks are governed by strain fields in the vicinity of the crack tip. The numerical description of strains in the crack tip presents some challenges in the modelling by the multiscale involved in the fracture analysis. In this study, it is proposed a 2D finite element analysis conducted for fatigue crack propagation experiments (mode I) performed for a railway axle steel EA4T under plane stress conditions. The analysis considers a geometric approach to define a multiscale mesh on a center-crack tension (CCT) specimen for which a nonlinear material model with kinematic hardening was assumed. Crack tip opening displacement (CTOD) and plastic zones were determined for several load levels during loading and unloading states. The results show that the applied correction factors approximate better the crack propagation rate. Furthermore, the quadratic dependence of CTOD with the stress intensity factor was in good agreement with the numerical solutions.

Název v anglickém jazyce

Finite Element Analysis of Crack-tip Opening Displacement and Plastic Zones Considering the Cyclic Material Behavior

Popis výsledku anglicky

Propagation and behavior of fatigue cracks are governed by strain fields in the vicinity of the crack tip. The numerical description of strains in the crack tip presents some challenges in the modelling by the multiscale involved in the fracture analysis. In this study, it is proposed a 2D finite element analysis conducted for fatigue crack propagation experiments (mode I) performed for a railway axle steel EA4T under plane stress conditions. The analysis considers a geometric approach to define a multiscale mesh on a center-crack tension (CCT) specimen for which a nonlinear material model with kinematic hardening was assumed. Crack tip opening displacement (CTOD) and plastic zones were determined for several load levels during loading and unloading states. The results show that the applied correction factors approximate better the crack propagation rate. Furthermore, the quadratic dependence of CTOD with the stress intensity factor was in good agreement with the numerical solutions.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název periodika

Procedia Structural Integrity

ISSN

2452-3216

e-ISSN

—

Svazek periodika

23

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

IT - Italská republika

Počet stran výsledku

6

Strana od-do

529-534

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—