Simulation the Arc welding in a rectangular path using DFLUX subroutine Abaqus
In this example, we intend to simulate the Arc welding in a rectangular path using Dflux subroutine in the Abaqus software
We use volumetric heat flux for simulation of the welding process, and we use Goldak’s double-ellipsoid model for define volumetric heat flux, and we use the Dflux subroutine for define Goldak’s double-ellipsoid model
Dflux subroutine is used to define nonuniform heat flux
The welding torch moves through AB , BC , CD , DE and EA respectively , in fact welding Torch moves in a rectangular path
This problem is done in two steps
In step1 , we simulate welding process with duration of 32 seconds
In step2 , we simulate cooling process with duration of 120 seconds
To do so , we define two Coupled temp-displacement step
The material of the plate is SUS304
Density, thermal conductivity, specific heat, thermal expansion, elastic properties and plastic properties depend on the temperature
In this example , welding voltage is 22 volt , welding current is 110 ampere , efficiency is 0.8 , welding speed is 10mm/s
Goldak’s double-ellipsoid heat source model is adopted to calculate volumetric heat flux distributions as heat input around the welding pool
Equations of the Goldak’s heat source model is defined as a function of position and time together with a number of parameters
The constants a,b,Cf,Cr as shown in picture are heat source parameters that define the size and shape of the ellipses and these parameters are obtained from experimental analysis
Duration :29 minutes
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