March 2018
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FEA Simulation of Threaded Connection Failure

FEA of Thread Results

Mainstream Engineering Ltd (MEL) were engaged to investigate the behaviour and stresses within the support columns of a large bale press following the failure of a column at the threaded end connection to the end frame. Figure 1, illustrates the press arrangement with four solid round columns that are threaded at each end where a large nut secures them to the end frames. The columns are fixed between the end frames and are subject to large cyclic tensile forces as the press operates. The failure occurred over a long period (years) where at least one of the nuts fixing a column to an end frame had become loose, eventually resulting in fracture at the threaded section of the column. The purpose of the study was to identify how the members were loaded in various situations and validate the suspected cause of failure. This paper summarises some important considerations for bolted connections and describes the method and results of using Finite Element Analysis to analyse the failure and propose a solution to prevent recurrence.

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FEA SIMULATION OF THREADED CONNECTION FAILURE

More Information:   FEA SIMULATION OF THREADED CONNECTION FAILURE