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Influence of the Stress-State on the J-Integral Value by Fracture Toughness Specimens with Medium Thickness


Kozak, Dražan; Kljajin, Milan; Semenski, Damir
Influence of the Stress-State on the J-Integral Value by Fracture Toughness Specimens with Medium Thickness // DAAAM International Scientific Book 2003 / Katalinic, Branko (ur.).
Beč: DAAAM International Vienna, 2003. str. 339-346


Naslov
Influence of the Stress-State on the J-Integral Value by Fracture Toughness Specimens with Medium Thickness

Autori
Kozak, Dražan ; Kljajin, Milan ; Semenski, Damir

Vrsta, podvrsta i kategorija rada
Poglavlja u knjigama, znanstveni

Knjiga
DAAAM International Scientific Book 2003

Urednik/ci
Katalinic, Branko

Izdavač
DAAAM International Vienna

Grad
Beč

Godina
2003

Raspon stranica
339-346

ISBN
3-901509-30-5

Ključne riječi
Fracture toughness specimen, J-integral, plane stress, plane strain, solid model, finite element analysis

Sažetak
Experimental evaluation and numerical calculation of J-integral on BxB fracture toughness specimens with thickness of B=36 mm have been performed. For this thickness neither pure plane stress nor pure plane strain state assumption is not valid, because there prevails mixed state-of-stress. In that case, only solid finite element model of the specimen gives satisfied results. Unfortunately, 3-D finite element models demand much more time and efforts to obtain J-solution. Therefore, two-dimensional analyses are more user-friendly and faster, but it should be very careful by discussing of results getting into consideration all restrictions. However, it seems that for the structures with medium thickness plane strain state is more dominating, especially after initiation of the crack. But, after the onset of crack growth validity of J-dominance loses under plane strain condition.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo



POVEZANOST RADA


Ustanove
Fakultet strojarstva i brodogradnje, Zagreb,
Strojarski fakultet, Slavonski Brod