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finite element method

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Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 468-481, October 22–25, 2013,
...-sized forging was produced as a trial run for a turbine rotor. The vacuum arc remelting process was employed to minimize segregation risk, and a forging procedure was meticulously designed using finite element method simulations. This trial production resulted in a successfully manufactured rotor...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 750-759, October 15–18, 2024,
... framework to explore the plausible mechanisms that may explain the reduced creep ductility and strength of diffusion bonded material, compared to wrought material. The crystal plasticity finite element method (CPFEM) is used to study factors affecting bond strength in polycrystals mimicking diffusion bonded...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 1322-1329, October 21–24, 2019,
... of that of a specimen with no defects. In addition, as a result of investigating the stress concentration around a defect with a depth ratio of about 5% by the finite element method, stress concentration was clearly observed around the defect. These results suggest that taking a miniature sample up to a depth of 5...
Proceedings Papers

AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 603-619, August 31–September 3, 2010,
... stresses). One way to improve the design of new high temperature components consists in the use of modern constitutive equations. Indeed, the European Pressure Equipment Directive (PED) allows for example the use of Design By Analysis (DBA). Consequently, Finite Element Method (FEM) can be used to predict...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 544-555, October 11–14, 2016,
... Abstract This study is concerned with the creep damage evaluation for the welded joint of modified 9Cr-1Mo steels. A finite element prediction method based on ductility exhaustion approach has been proposed. Degradation of creep ductility under multi-axial stress state has been formulated from...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 1048-1059, October 21–24, 2019,
... good creep ductility due to the absence of γ’ phase precipitates. A method to evaluate stress relaxation cracking susceptibility was developed by applying a three-point bending test using a specimen with a V-notch and finite element analysis (FEA), and it was shown that stress relaxation cracking...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 207-218, October 15–18, 2024,
...). In conjunction with the mechanical tests, a finite element (FEA) modelling approach has been used to help cross validate the methodology and results, and to enable larger lattice structures to be modelled with confidence. The specimen design and testing approach developed, is described and the results reviewed...
Proceedings Papers

AM-EPRI2010, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Sixth International Conference, 530-553, August 31–September 3, 2010,
... steam line branch intersection , Int. J. Press. Vessels and Piping, 83, 359-364, 2006. 16. T.H. Hyde, W. Sun and A.A. Becker, Life assessment of weld repairs in ½Cr½Mo¼V main steam pipes using the finite element method. J. Strain Analysis, 35, 5, 359-372, 2000. 17. T.H. Hyde, J.A. Williams and W. Sun...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 690-701, October 22–25, 2013,
... fraction rule as almost 110,000 h. Finite-element analysis was also conducted to assess the damage and remaining life, and the results were compared with the experimental results. creep damage creep rupture test creep-strength enhanced ferritic steel fine-grain heat-affected zone finite-element...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 304-314, October 21–24, 2019,
... as a reference through the window. MODELLING OF LARGE UNIAXIAL TENSILE TEST Finite Element Modelling The hot tensile test specimen was simulated using the finite element method in order to accurately calculate the strains within the specimen at failure using an elastic-plastic analysis. A basic constitutive...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 1270-1281, October 21–24, 2019,
... SPCT can be modelled using finite element methods [7]. Importantly, these methods further allow for more realistic constitutive materials models that includes the effects of initial plasticity and damage development during the test [8]. Inverse-modelling approaches have been employed to determine...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 1098-1108, October 21–24, 2019,
..., F.Z. Xuan, Influence of nonhomogeneous microstructure of multi-pass weld metal on creep behavior of cross-weld specimen based on finite element method, in: Proceedings of ASME 2017 Pressure Vessels and Piping Conference, 16-20 July, Hawaii, 2017. [8] G. An, S.M. Jeong, J. Park, Ductile crack...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 1397-1406, October 22–25, 2013,
... of the previous work in this effort may be found in References 1 through 3. A short summary is provided in this paper. The main recent development was the full scale accelerated SCC cracking in boiling magnesium chloride (MgCl 2 ) experiment. In conjunction with experimentation, both 2D and 3D finite element (FEA...
Proceedings Papers

AM-EPRI2013, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Seventh International Conference, 1244-1255, October 22–25, 2013,
... analysis to determine a set of calibration curves for inferring strain at any given vertical displacement. Some creep strain data are also presented. creep strain displacement finite element analysis small punch creep test test specimens Advances in Materials Technology for Fossil Power Plants...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 690-701, October 11–14, 2016,
...) for the desired bore geometry and to achieve the benefits of the centrifugal process. Casting solidification simulation analysis was carried out for estimation of solidification cooling rates. The surface indication on the casting bore on the chromite sand mold side matched well with the finite element method...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 662-668, October 15–18, 2024,
... but also many other high-temperature materials. In addition, recently, the finite element method (FEM) has been widely used to predict the mechanical properties of microstructures based on the idea of structure-property linkage. In the FEM analysis, the elastic moduli as the input data of constituent...
Proceedings Papers

AM-EPRI2016, Advances in Materials Technology for Fossil Power Plants: Proceedings from the Eighth International Conference, 516-529, October 11–14, 2016,
... as well, including microstructural evaluation using creep replicas, stress analysis using finite element methods and remaining life to creep crack initiation. It is at this stage where repair or replacement decisions are made. The general procedure is outlined in Figure 5 [16]. Figure 5: Generic procedure...
Proceedings Papers

AM-EPRI2019, 2019 Joint EPRI – 123HiMAT International Conference on Advances in High-Temperature Materials, 1181-1192, October 21–24, 2019,
... power plants chemical composition finite element method mechanical properties microstructure nickel alloys turbine rotor forgings Joint EPRI 123HiMAT International Conference on Advances in High Temperature Materials October 21 24, 2019, Nagasaki, Japan J. Shingledecker, M. Takeyama, editors...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 1320-1330, October 15–18, 2024,
.... The remaining of the paper is organized as following. Section 2 describes the characterization of heterogeneous creep behavior within HAZ, which has been tested by Wang et al. [21]. Section 3 presents an analysis technique that combines the finite element method for structural analysis with physical cavity...
Proceedings Papers

AM-EPRI2024, Advances in Materials, Manufacturing, and Repair for Power Plants: Proceedings from the Tenth International Conference, 449-460, October 15–18, 2024,
.... Temperature Profile Different methods were used to characterize the sample temperature profile during the testing. First, a finite element model was used. In creating a model for the IN718 sample, adaptive 451 meshing was employed within COMSOL 6.0 Multiphysics, specifically utilizing the Heat Transfer...