Št. zadetkov: 14
Objavljeni znanstveni prispevek na konferenci
Oznake:
mehanika loma;semi-elliptical through-wall crack;crack opening displacement;GE/EPRI approach;leak-before-break analysis;reference stress approach;
The work presents methods to estimate elastic-plastic semi-elliptical through-wall Crack Opening Displacement (COD) for the Leak-Before-Break analysis of a pressurizer. Usually proposed methods are based on GE/EPRI approach or on the reference stress and J-integral as stress intensity factor (SIF) a ...
Leto:
2012
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
korodirana vročevodna cev;poškodba;DNV-RP-F101-procedura;dovoljeni pritisk;FEM-analiza;
This paper deals with a determination of the critical pressure, i.e., the allowable operating pressure, of a corroded pipeline. This allowable pressure, as well as the safe-working pressure, are determined by using the analytic expressions given in the DNV-RP-F101 procedure for corroded pipelines. T ...
Leto:
2010
Vir:
dLib.si Digitalna knjižnica Slovenije
Izvirni znanstveni članek
Oznake:
zvarni spoj;metoda končnih elementov;lomna žilavost CTOD;krhki cepilni lom;omejitev;
Varno obratovanje varjene konstrukcije je odvisno od lomno mehanskih lastnosti zvarnih spojev. Največje spremembe teh lastnosti nastopajo v prehodnem področju iz duktilnega v krhki lom. Namen tega raziskovalnega dela je z metodo končnih elementov definirati primeren numerični postopek za izračun nap ...
Leto:
1998
Vir:
Fakulteta za strojništvo (UM FS)
Objavljeni znanstveni prispevek na konferenci
Oznake:
lomna mehanika;zvarni spoji X oblike;razpoka v središču;trdnostno neujemanje;meja plastičnega tečenja;mejna obremenitev;omejevanje plastične deformacije;fracture mechanics;X-shaped welded joints;centre crack;strength mismatching;plastic yield load;constraint effects;
This paper provides yield load solutions for single edged fracture toughness specimen subjected to bending SE (B) with present X-shaped weld joint. The weld centre crack is located in the overmatch weld part. The corresponding fully plastic yield loads were obtained directly by plain strain FEM anal ...
Leto:
2004
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
trdnost spoja z večjo trdnostjo vara;razpoka;porazdelitev napetosti;porazdelitev deformacij;analiza končnih elementov;strength overmatched welded joint;crack;stress distribution;strain distribution;finite element analysis;
In this investigation a high-strength low-alloyed (HSLA) steel of the 700-MPa strength class was used as a base material. A butt-welded joint with X grooves was produced with an overmatched weld metal that had a yield strength 23 % greater than that of the base material. Three-point bending B x 2B t ...
Leto:
2007
Vir:
Fakulteta za strojništvo (UM FS)
Objavljeni znanstveni prispevek na konferenci
Oznake:
zaostale napetosti;cevi;mehanske napetosti;natezni preizkus;preiskava materiala;residual stress;pipe;hoop stress;incremental hole drilling method;splitting method;tensile test;F - CMOD;PRS;PRNB;SENB;
Proposal of new Pipe-Ring specimen for fracture mechanics
Leto:
2016
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
mehanika loma;utrujenost materiala;meja utrujenosti materiala;deformacije;razpoke;mikrostruktura;zlitine;intrinsic fatigue limit;microstructural fatigue threshold;material defects;fracture mechanics;intrinsic fatigue resistance;
In the field of long-life fatigue, predicting fatigue lives and limits for mechanical components is crucial for ensuring reliability and safety. Fracture mechanics tools have enabled the estimation of fatigue lives for components with small cracks or defects. However, when dealing with defects large ...
Leto:
2023
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
heterogeni zvarni spoji;visokotrdnostno jeklo;mehansko preizkušanje;poškodbe materiala;mehanika loma;mehanske lastnosti;analiza končnih elementov;heterogeneous welded joint;high strength steel;mechanical testing;damage;fracture;mechanical properties;finite element analysis;
The heterogeneity of welded joints’ microstructure affects their mechanical properties, which can vary significantly in relation to specific weld zones. Given the dimensional limitations of the available test volumes of such material zones, the determination of mechanical properties presents a certa ...
Leto:
2023
Vir:
Fakulteta za strojništvo (UM FS)
Izvirni znanstveni članek
Oznake:
kovinske konstrukcije;zvarni spoji;lomna mehanika;razpoke;SE(B) vzorec;sila tečenja;parametri omejitve tečenja;welded structures;welded joints;fracture mechanics;cracks;SE(B) specimens;yielding load;yielding constraint parameters;
Z uporabo metode končnih elementov je raziskan vpliv različne trdnosti materiala in različne geometrije zvarnih spojev na omejitev tečenja zavarjene konstrukcijske komponente. Kot konstrukcijska komponenta je uporabljen upogibno (tritočkovno) obremenjen lomnomehanski preizkušanec. V prispevku je ana ...
Leto:
2005
Vir:
Digitalna knjižnica Univerze v Mariboru (DKUM)
Izvirni znanstveni članek
Oznake:
dinamična rekristalizacija;varjenje s trenjem;udarna trdnost;mikrotrdota;dynamic recrystallization;friction stir welding;impact strength;micro hardness distribution;
In this paper, the influence of rotation speed and welding speed on the impact strength, microstructure and cross section micro hardness of FSW welded joints of Al-Zn-Mg-Cu high strength aluminium alloy is studied. Rotation speed was varied from 750 min−1 to 850 min−1 and welding speed from 60 mm/mi ...
Leto:
2017
Vir:
Fakulteta za strojništvo (UM FS)