Stress Analysis of the F-111 Wing Pivot Fitting

摘要

A number of high stress and potential cracking sites in the F-111 wing pivot fitting (WPF) have been identified using a validated 3D finite element model. Selected locations have been analyzed in detail, and ranked according to the magnitude of the peak stress. These locations have also been compared with known sites of in-service cracking. Overall, there is very good agreement between the locations identified from the finite element model and those experiencing in-service cracking. The results from this investigation may assist the RAAF in reviewing inspection requirements for the F-111 WPF.