Unable to generate Spot weld connection between Solid elements
Altair EmployeeHello Everyone,
I am trying to establish spot weld between Solid Hexa8N elements. I have tried to use 'plot', 'Type 2 spring' and 'HC Hexa' type. But in all the cases I am having following issues:
1) Type (Plot): Simulation ran but solid elements were not connected
2) Type [Spring (Type 2)]: Solver not able to identify the surface to create a spring elements.
3) Type HC Hexa: Contact interface defined by solver itself is not correct.
Apart from aforementioned problem I also want to give the max tensile strength of spot weld as as 40% of base material.
Thanks in advance.
Nitin Jain
Answers
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Hi
Can you please share your model.
You can use the secure drop box link https://ftin.india.altair.com:8443/filedrop/~Ma3TaE
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Hello @Pranav Hari,
I have uploaded the file on the shared link.
But I have deleted some parts and Boundary conditions.
Please assign boundary condition as per your convenience.
Regards
Nitin Jain
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Hi Nitin Jain
The recommended element types in Radioss for spot weld creation are shell element.
Surface 1 and 2 for each solid spotweld should always connect with a shell element. If one surface of one solid spotweld is not connected with a shell element,
then the stiffness will not be computed correctly and an error may occur
Since you are having solid elements you have to create a shell coat and then connect using spots.
There are three different ways of modeling spotweld:
• Node Connect • Spring (/PROP/TYPE13) Connect • Solid Connect When you create a spot weld using type 2 spring, by default you will get the (TYPE13 spring property + TYPE2 contact).
In your case since you have to define max tensile strength of spot weld as 40% of the base material, then I recommend you use the solid connect method.
Here you can specify separate failure criteria.
This is explained in detail in the Radioss help documentation. Please have a look
<?xml version="1.0" encoding="UTF-8"?>
Also, have a look at the Radioss example on solid spot weld creation.
<?xml version="1.0" encoding="UTF-8"?>
I have shared the 2 example deck files, which is modeled using default spring contact and also solid connect. Check that too.
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Altair Forum User said:
Since you are having solid elements you have to create a shell coat and then connect using spots.
Contact surfaces can also be used.
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Thanks @Pranav Hari and @Ivan,
I think making surface and then spot weld is time consuming process.
Moreover I request you to please teach me, if I connect the extracted surface with connector: then solids will be connected as well or it will connect only extracted surfaces.
Right now, I am trying to make the Seam weld connections (Hexa Tapered T type) but I am getting the distorted elements:
<?xml version="1.0" encoding="UTF-8"?>
I am avoiding edge nodes for better results. But still some elements are not as desired.
Regards
Nitin Jain
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Hello everyone,
Does someone know how to solve the above mentioned problem??
Thanks in advance.
Regards
Nitin Jain
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hi you
i had refered the document, so i never make stiffness of spring, because the result also flying
pelase show me
thanks
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