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Prikaz rezultata 131-140 od 150
Ductile fracture prediction of steam pipeline steel
(Trans Tech Publications Ltd, Durnten-Zurich, 2006)
Considering the conditions to which steels used for the manufacture of steam pipelines are exposed, the micromechanism of their destruction in exploitation is exclusively the ductile one. In order to make an estimation of ...
Klasifikacija eksploatacijskih oštećenja čeličnih užadi / Classification of in-service damages of Steel wire ropes
(Institut za ispitivanje materijala, Beograd, 2007)
Radni vek čeličnih užadi je ograničen zbog promene njihovih svojstava tokom eksploatacije pod dejstvom radnih uslova i opterećenja. Redovan nadzor tokom eksploatacije omogućava kontrolu razvoja oštećenja i normalni proces ...
Eksperimentalno određivanje dinamičke žilavosti loma KId, kod metalnih materijala visoke čvrstoće / Experimental determination of dynamic fracture toughness KId in metal materials with high strength
(Visoka tehnička škola strukovnih studija, Beograd, 2003)
U ovom radu su prikazane metode za određivanje dinamičke žilavosti loma, KId Metode dinamičkog J integrala, i ekvivalenta energije su eksperimentalno potvrđene ispitivanjem čelika Č 5432 i Č 4734. Ovaj rad predstavlja ...
Microstructure and fracture of alloyed austempered ductile iron
(Elsevier Science Inc, New York, 2006)
An investigation has been conducted on two austempered ductile irons alloyed with Cu and Cu+Ni, austenitized at 900 degrees C and austempered at 350 degrees C. The microstructure and fracture mode developed through these ...
Application of Complete Gurson Model for prediction of ductile fracture in welded steel joints
(Trans Tech Publications Ltd, 2009)
Ductile fracture process includes three stages: void nucleation, their growth and coalescence. The voids nucleate due to the fracture or separation of non-metallic inclusions and secondary-phase particles from the material ...
Hronologija gubitka integriteta konstrukcija zbog grešaka izrade zavarenih konstrukcija / Chronology of lost structural integrity initiated from manufacturing defects in welded structures
(Institut za ispitivanje materijala, Beograd, 2009)
U različitim vremenskim periodima dolazilo je do gubitka integriteta zavarenih konstrukcija zbog razvoja proizvodnih grešaka zavarenog spoja. Mehanizmi otkaza su bili različiti i uvek su predstavljali novo iskustvo, koje ...
Tehnologija navarivanja kanala na tramvajskim srcima / Technology of hardfacing applied to the tramwayswitch-hearts channels
(DUZS - Društvo za unapređivanje zavarivanja u Srbiji, Beograd, 2008)
Reparatura oštećenih delova šina i skretničkih srca postupkom navarivanja je standardna metoda održavanja šina u svetu. Beograd je jedini grad u Srbiji u kome postoji tramvajski saobraćaj. Zbog konfiguracije terena po kome ...
Damage Level Estimate of API J55 Steel for Welded Seam Casing Pipes
(Croation Union of Mech. Engineers and Naval Architects, 2009)
The subject of this paper is investigation of the damage level of API J55 steel, used for manufacturing casing pipes by high frequency (HF) contact welding. The analysed pipe was withdrawn after about 70 000 hours of service ...
Measurement of strain using stereometry
(Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek, 2009)
This paper presents measurement of strain using stereometry method. It describes the use of digital stereometry to measure microstrains on the surface. This can be achieved by comparison of the images of point distribution ...
Softver u oblasti ispitivanja metalnih materijala / Software in the field of the metal materials testing
(Savez inženjera metalurgije Srbije, Beograd, 2005)
Razvoj softvera u oblasti ispitivanja metala tekao je uporedo sa razvojem računarske opreme - hardvera. Osnovni cilj ovog rada je pokušaj pružanja pregleda postojećeg softvera u oblasti ispitivanja metala. Drugi postavljeni ...