scholarly journals The simulation of the stress field of welded joint containing the discontinuities No 1014

2019 ◽  
Vol 91 (1) ◽  
Author(s):  
Jerzy Nawrocki ◽  
Jacek Słania
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Fracture Mechanics ◽  
Stress Field ◽  
Weld Joint ◽  
Welded Joint ◽  
Finite Element Method Simulation ◽  
The Finite Element Method ◽  
Element Method

This paper contains the results of the stress field of the weld joint which contains the incompatibility 1014. Calculations were carried out by using the finite element method simulation and the rough calculations performed with accordance to the principles of the fracture mechanics.

scholarly journals Voids Nucleation at Inclusions of Various Shapes in Front of the Crack in Plane Strain

2016 ◽  
Vol 61 (3) ◽  
pp. 1587-1592 ◽  
Author(s):  
A. Neimitz ◽  
U. Janus
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress Distribution ◽  
Stress Field ◽  
Plane Strain ◽  
Crack Front ◽  
The Finite Element Method ◽  
Element Method

Abstract An analysis is presented of the stress field in and around inclusions of various shapes. Results were obtained by the finite element method. Inclusions were located within elementary cells located at the centre of the specimen next to the crack front. The influence of an in-plane constraint on the stress distribution was tested.

scholarly journals Modeling and Calculating of Residual Stress and Strain of Butt Welded Joint

2021 ◽  
Vol 31 (5) ◽  
pp. 58-67
Keyword(s):  
Finite Element Method ◽  
Residual Stress ◽  
Finite Element ◽  
Residual Stresses ◽  
Welded Joint ◽  
The Finite Element Method ◽  
Force Method ◽  
Stress Components ◽  
Residual Stresses And Strains ◽  
Element Method

The non-uniform thermal expansion and contraction resulting from welding processes cause residual stresses and strains. Experimental studies on measuring welding residual stresses and strains of structure are costly and sometimes they are not possible. Previously, analytical methods with idealized models were developed to determine the welding residual stresses and strain. Recently, numerical methods are constructed to analyze the stresses and the strains in welded structures. This paper presents the calculation results of residual stress and welding strain in butt welded joint of S355J2G3 carbon steel of 5 mm thickness made by MAG welding process with a single pass. The calculation is performed by two methods: the imaginary force method and the finite element method. In the finite element method, the SYSWELD software is used to simulate and to determine residual stresses and strain of this welded joint. The results of finite element method are compared with those of imaginary force method to show the rationality and the advantages of finite element method. The study results have shown that in this welded joint, only the longitudinal and transverse stress components are important and the other stress components are negligible.

Degradation of Hardness of Alloys from Phase Coarsening

2018 ◽  
Vol 941 ◽  
pp. 759-765
Author(s):  
Ji Cheng Li ◽  
Ke Gang Wang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Microstructural Evolution ◽  
Finite Element Method Simulation ◽  
The Finite Element Method ◽  
Phase Coarsening ◽  
Considerable Degradation ◽  
Diffusion Simulation ◽  
Element Method

The hardness of alloys after phase coarsening is analyzed through the linkage between the multiparticle diffusion simulation and the finite element method simulation. Our analysis demonstrates that considerable degradation of the hardness of alloys occurs due to phase coarsening, which is related to the precipitate sizes and their distribution within the alloy. The microstructural evolution alters the manners of the nucleation, multiplication and movement of dislocations within the material, and further leads to different degradation of macroscopic hardness of alloys.

Simulation of Single Crystal Nickel-Based Superalloys Creep on Finite Element Method

2012 ◽  
Vol 433-440 ◽  
pp. 2029-2033
Author(s):  
Shu Zhang ◽  
Lei Meng
Keyword(s):  
Mathematical Model ◽  
Finite Element Method ◽  
Finite Element ◽  
Numerical Calculation ◽  
Stress Distribution ◽  
Stress Field ◽  
Single Crystal ◽  
Microstructure Evolution ◽  
The Finite Element Method ◽  
Element Method

Based on finite element Method a dynamic mathematical model is established, and the simulation of stress distribution around the defects of single crystal nickel-based superalloysis also established with ANSYS. After the change of stress field with time is analyzed, the result is compared with that achieved through numerical calculation and experimental analysis. The comparison shows that the finite element method is effective to study the stress distribution and can provide basis for creep features and microstructure evolution.

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