Estimation of heat source model parameters for twin-wire submerged arc welding

2009 ◽  
Vol 45 (11-12) ◽  
pp. 1096-1103 ◽  
Author(s):  
Abhay Sharma ◽  
Ajay Kumar Chaudhary ◽  
Navneet Arora ◽  
Bhanu K. Mishra
Keyword(s):  
Heat Source ◽  
Arc Welding ◽  
Source Model ◽  
Submerged Arc Welding ◽  
Model Parameters ◽  
Heat Source Model ◽  
Submerged Arc

A Simplified Numerical Approach for Finding the Temperature Distribution in Submerged arc Welding Process

2012 ◽  
Vol 622-623 ◽  
pp. 315-318
Author(s):  
Aparesh Datta ◽  
Subodh Debbarma ◽  
Subhash Chandra Saha
Keyword(s):  
Temperature Distribution ◽  
Heat Source ◽  
Arc Welding ◽  
Welding Process ◽  
Numerical Approach ◽  
High Heat ◽  
Submerged Arc Welding ◽  
Fusion Welding ◽  
Arc Welding Process ◽  
Submerged Arc

The quality of joining has assumed a greater role in fabrication of metal in recent years, because of the development of new alloys with tremendously increased strength and toughness. Submerged arc welding is a high heat input fusion welding process in which weld is produced by moving localized heat source along the joint. The weld quality in turn affected by thermal cycle that the weldment experiences during the welding. In the present study a simple comprehensive mathematical model has been developed using a moving heat source and analyzing the temperature on one section and then the temperature distribution of other section are correlated with time delay with reference analyzed section.

Nonlinear Optimization Methods for the Determination of Heat Source Model Parameters

2016 ◽  
Vol 879 ◽  
pp. 2008-2013
Author(s):  
Udo Hartel ◽  
Alexander Ilin ◽  
Steffen Sonntag ◽  
Vesselin Michailov
Keyword(s):  
Experimental Data ◽  
Heat Source ◽  
Parameter Identification ◽  
Nonlinear Optimization ◽  
Laser Beam Welding ◽  
Source Model ◽  
Transient Temperature ◽  
Surface Model ◽  
Model Parameters ◽  
Heat Source Model

In this paper the technique of parameter identification is investigated to reconstruct the 3D transient temperature field for the simulation of laser beam welding. The reconstruction bases on volume heat source models and makes use of experimental data. The parameter identification leads to an inverse heat conduction problem which cannot be solved exactly but in terms of an optimal alignment of the simulation and experimental data. To solve the inverse problem, methods of nonlinear optimization are applied to minimize a problem dependent objective function.In particular the objective function is generated based on the Response Surface Model (RSM) technique. Sampling points on the RSM are determined by means of Finite-Element-Analysis (FEA). The scope of this research paper is the evaluation and comparison of gradient based and stochastic optimization algorithms. The proposed parameter identification makes it possible to determine the heat source model parameters in an automated way. The methodology is applied on welds of dissimilar material joints.

Numerical Simulation of CO2 Welding 409 Stainless Steel Multi-Crossed Parts

2013 ◽  
Vol 785-786 ◽  
pp. 989-992
Author(s):  
Ge Wang Shuai ◽  
You Li ◽  
Ping Fang
Keyword(s):  
Stainless Steel ◽  
Heat Source ◽  
Arc Welding ◽  
Source Model ◽  
Heat Source Model ◽  
Transient Stress ◽  
Co2 Welding ◽  
Stress And Deformation ◽  
Welding Sequences ◽  
Residual Stress And Deformation

A dynamic 3D thermal and mechanical Simulation of CO2 welding 409 stainless steel multi-Crossed parts was carried out by using the software SYSWELD. A double ellipsoid heat source model of CO2 arc welding was explored and fitted with the Heat Source Fitting tool. The transient stress and strain fields of 409 stainless steel multi-crossed weld joint under two kind of welding sequences were obtained by loading the simulated temperature field, which helps to decrease the residual stress and deformation of 409 stainless steel multi-Crossed parts welding.

scholarly journals Multi-objective calibration of the double-ellipsoid heat source model for GMAW process simulation

2021 ◽  
pp. 181-181
Author(s):  
Miso Bjelic ◽  
Branko Radicevic ◽  
Karel Kovanda ◽  
Ladislav Kolařík ◽  
Aleksandra Petrovic
Keyword(s):  
Numerical Model ◽  
Heat Source ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Calibration Procedure ◽  
Source Model ◽  
Objective Functions ◽  
Heat Source Model ◽  
Metal Arc Welding ◽  
Input Parameters

The scope of application of simulation models in welding is limited by the accuracy of their output results. This paper presents a calibration procedure for a three-dimensional quasi-stationary model of heat transfer for gas metal arc welding. The double-ellipsoid heat source used in this model has five input parameters whose value cannot be specified accurately. To estimate these values, we employed a multi-objective calibration procedure with two objective functions using the paretosearch optimization algorithm. Objective functions represented the error between simulated and experimentally observed values of penetration depth and weld bead width during gas metal arc welding of P355GH steel plates. All input parameters were assumed to be a power function of line energy. To reduce computational time, we replaced the numerical model with a response surface methodology metamodel based on an optimal set of simulation results from the numerical model. The results of the simulations based on calculated values of input parameters for the heat source model showed excellent matching with the experimental results.

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