Investigation of Long Shaft Failure in John Deere 955 Grain Combine Harvester under Static Load

Abstract Shaft in combine is one of the most important components of transformer of power to the wheels. One of the main failures in combines is breaking shaft which repairmen refer it. For analyzing stress, a typical sample from a type of combine was selected, called JD955 combine. Long shaft in this combine was analyzed with finite element method by the generic package of Ansys13 under static load. Conducted analysis showed that there is a maximum stress in contact surfaces of indentations and also in place of changing diameter. Safety factor value is low in parts of the shaft and this increases the probability of failure at these points