V. Gliha
Fakulteta za strojnistvo
2000 Maribor, Smetanova 17
I. Rak, A. Pristavec, Fakulteta za
strojnistvo, Maribor
Primerjali smo rezultate simulacije obremenjevanja po metodi
koncnih elementov in preizkusov CTOD. Eksperimentalno delo smo
opravili na sinteticnih mikrostrukturah razlicnih potencialno
krhkih delov vecvarkovnega toplotno vplivanega podrocja zvara.
Izmerili smo njihove mehanske lastnosti in z njimi modelirali
vedenje materiala pri simulaciji obremenjevanja po metodi koncnih
elementov. Izkazalo se je, da bi to lahko bilo uporabno za
analiziranje vedenja zvarnih spojev pri lomu.
Kljucne besede: zvarni spoj, toplotno vplivano podrocje, lokalno
krhko podrocje, metoda kon~nih elementov, deformacijsko utrjanje,
lomna zilavost CTOD, krhki lom, iniciacija razpoke, stabilno
narascanje razpoke
A comparison of results of loading simulation using finite
element method and CTOD testing was performed. Experimental work
was carried out on synthetic microstructure of different
potentially brittle parts of multipass heat affected zone of the
weld. Their mechanical properties were measured and used for
finite element method modelling of material behaviour during
loading simulation. It seems that this could be an useful tool in
fracture behaviour analysis of weld joints.
Key words: weld joint, heat affected zone, local brittle zone,
finite element method, strain hardening, CTOD fracture toughness,
brittle fracture, crack initiation, stable crack growth