|
Vol.13, No3, 2013, pp.189–196 |
|
SCENARIO OF FRACTURE DEVELOPMENT IN BUCKET WHEEL EXCAVATOR Darko Daničić1, Stojan Sedmak2, Ivo Blačić3, Snežana Kirin4 1)Kolubara metal, Lazarevac, Serbia, galko@open.telekom.rs 2)University of Belgrade, Faculty of Technology and Metallurgy, Belgrade, Serbia 3)Military Technical Institute, Belgrade, Serbia 4)Innovation Centre of the Faculty of Mechanical Engineering Belgrade, Serbia |
|
Abstract Continued service of BWE in severe working conditions may result in machine failure. In case of important structural elements it might lead to a large-scale breakdown. The allocation of structurally significant elements is of vital importance for the lifecycle of BWE, starting from design and construction, through operation and maintenance. The example of recent failure of one BWE caused by complex fracture, consisting of fatigue and final fast fracture is here considered. A possible scenario indicated that fracture has started from a small element due to defects introduced by poor quality of welded joints whose significance in the structure has been underestimated in the given operating conditions and applied loading. Keywords: welded joint, stress distribution, structural integrity, maintenance, brittle fracture |
|
full article (818 kB)
|
