Претраживање
Приказ резултата 41-50 од 163
Determination of Residual Fatigue Life of Welded Structures at Bucket-Wheel Excavators through the Use of Fracture Mechanics
(Elsevier Science Bv, Amsterdam, 2018)
This paper presents a methodological approach for the assessment of service life of vital welded structures of a bucket-wheel excavator Sch Rs 650/5x24 ('Thyssen Krupp', Germany) boom, subjected to cyclic loading with a ...
An analysis of random mechanical failures of bucket wheel excavator
(Institut za ispitivanje materijala, Beograd, 2015)
In this article random mechanical failures of bucket wheel excavator at open cast mine "Tamnava Zapad" are analysed. Random mechanical failures of mining equipment may represent an important factor in coal production because ...
Scenario razvoja loma u rotorskom bageru / Scenario of fracture development in bucket wheel excavator
(Institut za ispitivanje materijala, Beograd, 2013)
Produženi rad rotorskog bagera (BWE) u teškim radnim uslovima može dovesti do otkaza mašina. Kod veoma važnih elemenata konstrukcije, može dovesti do katastrofalnog loma. Lociranje važnih elemenata konstrukcije je od ...
Influence of temperature and exploitation period on the behaviour of a welded joint subjected to impact loading
(Institut za ispitivanje materijala, Beograd, 2016)
Presented in this paper is the analysis of the influence of temperature and exploitation period on the measure of fracture resistance of welded joint constituents in both new and exploited low-alloyed Cr-Mo steel A-387 Gr. ...
Influence of multiple defects in welded joints subjected to fatigue loading according to sist en iso 5817: 2014
(Institut za ispitivanje materijala, Beograd, 2018)
Structural integrity of pressure vessels is of great importance in ensuring their safe exploitation. Due to this, a number of standards are developed in order to define the criteria according to which materials, technologies ...
Uticaj zone loma iznad podzemne prostorije na opterećenje konstrukcije sa visećom podgradom / Impact of a failure zone above the underground roadway on rockbolting structure loading
(Institut za ispitivanje materijala, Beograd, 2015)
Research in this article presents development of model of strata interaction with roof support installed in bauxite. The main task of this research is modelling of rock degradation over the surface of underground roadway ...
Effect of locally damaged elbow segments on the integrity and reliability of the heating system
(Institut za ispitivanje materijala, Beograd, 2016)
This paper presents the integrity and reliability evaluation of the heating system as a whole, based on results of metallographic tests performed on parent material and the ultrasonic measurement of wall thickness of elbows ...
Stress state around imperfections in welded joints
(Institut za ispitivanje materijala, Beograd, 2015)
Because of their geometry, welded joints can cause a local increase of stress. In the presence of imperfections in welded joints the local stress additionally increases and can lead to the formation of cracks. Cracks are ...
Istraživanje mogućnosti primene lasera u čišćenju arheoloških metalnih predmeta / Laser cleaning of the archaeological metal sample from the Danube
(Inženjersko društvo za koroziju, Beograd, 2018)
U radu su prikazani rezultati laserskog čišćenja korozivnih i drugih naslaga na metalnom arheološkom predmetu koji je nađen u Dunavu. Korišćen je Nd:YAG laser, energije do 750mJ i talasne dužine λ=1064nm i 532nm. Efikasnost ...
Numerical analysis of different weld geometries of lap welded joint in ammonia transport tanks
(Institut za ispitivanje materijala, Beograd, 2017)
Presented is a comparison of stress and strain distribution in lap welded joints of different geometries, which are part of a pressure vessel used as an ammonia transport tank. For this purpose, two numerical models are ...