The Experts below are selected from a list of 157629 Experts worldwide ranked by ideXlab platform
M Mcdonald - One of the best experts on this subject based on the ideXlab platform.
-
stress analysis of the f 111 wing pivot fitting
2000Co-Authors: S Weller, M McdonaldAbstract:Abstract : 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.
S Weller - One of the best experts on this subject based on the ideXlab platform.
-
stress analysis of the f 111 wing pivot fitting
2000Co-Authors: S Weller, M McdonaldAbstract:Abstract : 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.
Sun W. - One of the best experts on this subject based on the ideXlab platform.
-
Modelling of a Grade 91 power plant pressurised header weldment under ultra super-critical creep conditions
'Elsevier BV', 2021Co-Authors: Ragab R., Parker J., Li M., Liu T., Sun W.Abstract:This paper is concerned with the creep-damage modelling of a Grade 91 pressurised header, which was observed to undergo In-Service Cracking in the weldments. A multi-axial creep damage model of Kachanov type, with a single state damage variable, has been implemented into finite element analysis to study the creep damage responses of weldments and the sub-zones i.e. the base metal (BM), weld metal (WM) and heat-affected zone (HAZ). Material properties for each weld constituent were obtained from the results of accelerated creep tests on materials extracted from the header. Predictions of crack initiation were made for sections of the stub to header welds. This analysis was also used to estimate creep failure life of the header weldment under ultra-super-critical conditions. Further, creep crack growth behaviour was predicted based on time-dependent critical damage growth. The predicted damage distributions and failure mode of the cross-weld creep test specimens were in good agreement with the reported experimental observations. The predicted damage distributions and Cracking in the header correlate reasonably well with the reported industrial observations
Ragab R. - One of the best experts on this subject based on the ideXlab platform.
-
Modelling of a Grade 91 power plant pressurised header weldment under ultra super-critical creep conditions
'Elsevier BV', 2021Co-Authors: Ragab R., Parker J., Li M., Liu T., Sun W.Abstract:This paper is concerned with the creep-damage modelling of a Grade 91 pressurised header, which was observed to undergo In-Service Cracking in the weldments. A multi-axial creep damage model of Kachanov type, with a single state damage variable, has been implemented into finite element analysis to study the creep damage responses of weldments and the sub-zones i.e. the base metal (BM), weld metal (WM) and heat-affected zone (HAZ). Material properties for each weld constituent were obtained from the results of accelerated creep tests on materials extracted from the header. Predictions of crack initiation were made for sections of the stub to header welds. This analysis was also used to estimate creep failure life of the header weldment under ultra-super-critical conditions. Further, creep crack growth behaviour was predicted based on time-dependent critical damage growth. The predicted damage distributions and failure mode of the cross-weld creep test specimens were in good agreement with the reported experimental observations. The predicted damage distributions and Cracking in the header correlate reasonably well with the reported industrial observations
Parker J. - One of the best experts on this subject based on the ideXlab platform.
-
Modelling of a Grade 91 power plant pressurised header weldment under ultra super-critical creep conditions
'Elsevier BV', 2021Co-Authors: Ragab R., Parker J., Li M., Liu T., Sun W.Abstract:This paper is concerned with the creep-damage modelling of a Grade 91 pressurised header, which was observed to undergo In-Service Cracking in the weldments. A multi-axial creep damage model of Kachanov type, with a single state damage variable, has been implemented into finite element analysis to study the creep damage responses of weldments and the sub-zones i.e. the base metal (BM), weld metal (WM) and heat-affected zone (HAZ). Material properties for each weld constituent were obtained from the results of accelerated creep tests on materials extracted from the header. Predictions of crack initiation were made for sections of the stub to header welds. This analysis was also used to estimate creep failure life of the header weldment under ultra-super-critical conditions. Further, creep crack growth behaviour was predicted based on time-dependent critical damage growth. The predicted damage distributions and failure mode of the cross-weld creep test specimens were in good agreement with the reported experimental observations. The predicted damage distributions and Cracking in the header correlate reasonably well with the reported industrial observations
