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Naslov:Estimate of the driving force for creep crack growth
Avtorji:ID Kolednik, Otmar (Avtor)
ID Kegl, Marko (Avtor)
ID Gubeljak, Nenad (Avtor)
ID Predan, Jožef (Avtor)
Datoteke:.pdf 1-s2.0-S0013794425002140-main.pdf (9,38 MB)
MD5: 20670AFE256090C9F8E16BD202967D47
 
URL https://www.sciencedirect.com/science/article/pii/S0013794425002140?via%3Dihub
 
Jezik:Angleški jezik
Vrsta gradiva:Članek v reviji
Tipologija:1.01 - Izvirni znanstveni članek
Organizacija:FS - Fakulteta za strojništvo
Opis:A discussion on the conventional creep crack growth parameters, e.g. the experimental C*-integral, C*exp, or the experimental Ct-integral, Ct,ssc, shows that the physical meaning of these parameters for growing cracks in elastic–plastic, creeping materials is not fully clear. Therefore, a comparison is presented in this paper between the conventional creep crack growth parameters, several J-integral related parameters and the crack driving force (CDF), which has been used in linear elastic and elastic–plastic fracture mechanics. The CDF for elastic–plastic, creeping materials is derived from basic thermodynamic principles and by applying the concept of configurational forces (CFs). A comprehensive numerical study is performed where crack propagation is modelled by alternating creep and crack extension steps at constant loads in a compact tension specimen made of the nickel-base superalloy Waspaloy at a temperature of 700 °C. The CDF is evaluated by a CF-based post-processing procedure after a conventional finite element computation. This procedure is applicable for small-scale creep (ssc-), transition creep (tc-) and “moderate” extensive creep (ec-) conditions. For more pronounced ec-conditions, the procedure might have to be adapted. It is shown that C*exp and Ct,ssc reflect the time derivative of the CDF during the creep stages. In contrast, the variations of the CDF coincide well with that of J-values estimated from the crack-tip opening displacement.
Ključne besede:fracture mechanics, creep crack growth, crack driving force, C*-integral, J-integral, configurational force concept, finite element method
Status publikacije:Objavljeno
Verzija publikacije:Objavljena publikacija
Poslano v recenzijo:27.02.2025
Datum sprejetja članka:03.03.2025
Datum objave:09.03.2025
Založnik:Elsevier
Leto izida:2025
Št. strani:19 str.
Številčenje:Vol. 319, [article no.] 111013
PID:20.500.12556/DKUM-92210 Novo okno
UDK:539.3:620.1
COBISS.SI-ID:229656323 Novo okno
DOI:10.1016/j.engfracmech.2025.111013 Novo okno
ISSN pri članku:1873-7315
Datum objave v DKUM:20.03.2025
Število ogledov:0
Število prenosov:3
Metapodatki:XML DC-XML DC-RDF
Področja:Ostalo
:
KOLEDNIK, Otmar, KEGL, Marko, GUBELJAK, Nenad in PREDAN, Jožef, 2025, Estimate of the driving force for creep crack growth. Engineering fracture mechanics [na spletu]. 2025. Vol. 319,  111013. [Dostopano 27 marec 2025]. DOI 10.1016/j.engfracmech.2025.111013. Pridobljeno s: https://dk.um.si/IzpisGradiva.php?lang=slv&id=92210
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Gradivo je del revije

Naslov:Engineering fracture mechanics
Založnik:Elsevier
ISSN:1873-7315
COBISS.SI-ID:9089633 Novo okno

Licence

Licenca:CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

Jezik:Slovenski jezik
Ključne besede:mehanika loma, rast plazeče razpoke, gonilna sila razpoke, koncept konfiguracijske sile, metoda končnih elementov


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