Napovedovanje rasti utrujenostne razpoke z metodo končnih elementov

magistrsko delo magistrskega študijskega programa II. stopnje Strojništvo

Andraž Istenič (Author), Jernej Klemenc (Mentor)

Abstract

V magistrskem delu smo predstavili uporabo komercialnega programa Abaqus 6.12 za napoved rasti razpok pri dinamično obremenjenih 3D-problemih. Pri simulacijah smo uporabili razširjene končne elemente (XFEM) v kombinaciji s Parisovim zakonom. Simulacije smo izvedli na C-preskušancu in preluknjanem preskušancu. V obeh primerih smo dosegli rast razpoke tako pri statičnem kot dinamičnem obremenjevanju. Pri preluknjanem preskušancu smo dobljene rezultate primerjali z eksperimentalnimi krivuljami zdržljivosti. Ugotovili smo, da je metoda sicer obetavna, vendar je že pri zmerno zapletenih primerih težko doseči konvergenco pri simulacijah rasti utrujenostnih razpok.

Keywords

magistrske naloge;rast razpok;utrujanje;razširjeni končni elementi;Parisov zakon;

Data

Language:	Slovenian
Year of publishing:	2021
Typology:	2.09 - Master's Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[A. Istenič]
UDC:	620.178.3:519.61:004.94(043.2)
COBISS:	71319811
Views:	696
Downloads:	128
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Predicting a fatigue-crack growth using finite-element method
Secondary abstract:	In the master's thesis a use of commercially available software Abaqus 6.12 for predicting a fatigue-crack growth in 3D solid problems is presented. For simulations an extended finite element method (XFEM) was used in combination with Paris law. An analysis of a compact tension (CT) and a notched dog-bone shaped specimen was performed. In both cases a static and dynamic crack growth was studied. Results of a notched dog-bone shaped specimen were compared to the experimental S-N curves. It was found out that method is promising but it is difficult to achieve convergence even for those moderately complex 3D specimens.
Secondary keywords:	master thesis;crack growth;fatigue life;extended finite-element method;Paris law;
Type (COBISS):	Master's thesis/paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. Ljubljana, Fak. za strojništvo
Pages:	XXVI, 64 str.
ID:	13085145