Hi,
I am trying to model keyhole mode laser welding but for some reason there only seems to be a pulse at the middle of the weld path and then the heat dissaptes soon after. This worked for a normal volumetric heat source but when I try to add anything that would make it resemble the heat disribution during keyhole welding this odd behavior appears. I tried reducing the mesh size around the welding path and the timestep but the results didn't change. I have attached the SIF file and the mesh.
The UDF for heat source is: alp*(2*p/(pi*((rx+ry+rz)**2)))*exp(-1*(((x-(x0 + v*time)/rx))**2 + ((y-y0)/ry)**2 + ((z-z0)/rz)**2))
with
x0 = -0.008
y0 = 0.0045
z0 = 0
p = 2000
v = 0.005
alp = 2700
rx = 1e-3
ry = 1e-3
rz = 5e-3
Thanks
Problem with modeling keyhole laser welding
Problem with modeling keyhole laser welding
- Attachments
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- casef3.sif
- (2.8 KiB) Downloaded 365 times
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- keyholeWeld.7z
- (1.91 MiB) Downloaded 386 times
Re: Problem with modeling keyhole laser welding
This is working now, I changed the function for the heat source such that the spot size depends on z.
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- Posts: 97
- Joined: 05 Nov 2011, 16:50
- Antispam: Yes
- Location: Nimes, France
Re: Problem with modeling keyhole laser welding
Hi stroop
Yes i know, i had a look to it in the afternoon and noticed two errors in your heat source expression. On "(" is badly written and an other one is missing!
I also noticed that you imposed your heat source on the opposite side to the refined one. The right z is around -0.01... You've got high temperatures values around 1e+37!!! now the heating is lower! Another point, you have to divide by the aluminium density (alp parameter) instead of multiplying the value by alp.
I attached the fortran file corrected.
Just another question where do you apply exactly your heat source? on which face is the laser beam?
Cheers
Yes i know, i had a look to it in the afternoon and noticed two errors in your heat source expression. On "(" is badly written and an other one is missing!
I also noticed that you imposed your heat source on the opposite side to the refined one. The right z is around -0.01... You've got high temperatures values around 1e+37!!! now the heating is lower! Another point, you have to divide by the aluminium density (alp parameter) instead of multiplying the value by alp.
I attached the fortran file corrected.
Just another question where do you apply exactly your heat source? on which face is the laser beam?
Cheers
- Attachments
-
- transweld.f90
- (2.32 KiB) Downloaded 357 times
Rouquette Sébastien
University of Montpellier / Mechanical and Civil Engineering Lab. / Welding Group
University of Montpellier / Mechanical and Civil Engineering Lab. / Welding Group
Re: Problem with modeling keyhole laser welding
Hi Sebastien,
Thanks for your reply,
I apply the heat source starting from the point (x0,y0,z0) so the laser beam is on face 11 and moves in the x direction which is the refined face.
Thanks for your reply,
I apply the heat source starting from the point (x0,y0,z0) so the laser beam is on face 11 and moves in the x direction which is the refined face.
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- Posts: 1
- Joined: 22 Feb 2021, 11:37
- Antispam: Yes
Re: Problem with modeling keyhole laser welding
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