Michal Bartošák (Avtor), Marko Nagode (Avtor), Jernej Klemenc (Avtor), Karel Doubrava (Avtor), Domen Šeruga (Avtor)

Povzetek

In this article, a new approach is proposed for modelling the stressstrain response of the Inconel 718 super-alloy under isothermal Low-Cycle Fatigue (LCF) loading. The proposed constitutive model is based on the Prandtl operator approach, in which a set of modifications is introduced in order to simulate strain range dependent cyclic softening. A new simulation capability is introduced by evolving the yield strains of the individual hysteresis operators with an accumulated plastic strain. In addition, the effect of the strain range dependency of cyclic softening is introduced into the proposed constitutive model by coupling its parameters with the concept of the plastic strain memory surface. These introduced modifications preserve the main advantages of the Prandtl operators, such as a small number of model parameters, their fast determination from the cyclic stressstrain curve, and a high computational speed, when used to simulate complex non-linear mechanical behaviour. Finally, the prediction capability of the proposed model is illustrated by various strain controlled tests performed at 500 °C, including block spectrum loading and variable strain amplitude loading.

Ključne besede

Prandtl operators;low-cycle fatigue;plasticity;nickel-based super-alloy;Inconel 718;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: UL FS - Fakulteta za strojništvo
UDK: 620.178.3:669.018.2
COBISS: 102892035 Povezava se bo odprla v novem oknu
ISSN: 0020-7403
Št. ogledov: 72
Št. prenosov: 17
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: Prandtlovi operatorji;nikljeva zlitina;ciklično mehčanje;utrujanje;
Vrsta dela (COBISS): Članek v reviji
Konec prepovedi (OpenAIRE): 2024-03-16
Strani: str. 1-11
Zvezek: ǂVol. ǂ222
Čas izdaje: May 2022
DOI: 10.1016/j.ijmecsci.2022.107182
ID: 14900710