Cable shovel dipper stress and fatigue failure modeling in formation excavation engineering

摘要: Large capacity shovels are used to achieve economic bulk production in surface mining operations. The suspended payload combined with dipper weight and formation resistive forces results severe stress loading of the shovel front-end assembly. Material flaws, high stresses harsh excavation conditions can initiate cracks dipper-teeth High cause these propagate critical lengths resulting fatigue failure, unscheduled downtimes, costly unplanned repairs, downstream processing circuit problems. literature reveals that dipper-related problems significantly reduce up-time. This research is a pioneering effort towards developing solid frame work for profiling, fracture failure modeling Kinematic dynamic models assembly have been built using Newton-Euler iterative algorithm incorporate forces. A numerical simulator designed solve models. virtual P&H 4100XPC prototype ANSYS (R15) software studies. It found maximum varies cubically density linearly cutting resistance. von-Misses on 282 MPa exceeds lower limits yield low, medium carbon steels. Crack propagation simulation studies show 100 mm crack-length 75 bottom-plate crack length 16 days. new knowledge provides basis designs different applications