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Found 8 results

  1. Hi all, I have a question about using contact ties to attached weld elements to a structure. In a nutshell, I've been asked to bring 2 models together with a dissimilar mesh and weld them. In the attached image on the left is a typical merged node to node approach with no contact - this would be our traditional approach. The middle contour plot is the same model but the weld is detached from the structure and is connected via a tied contact. The right contour plot is with a dissimilar mesh (similar to what I have been tasked with) and using the same contact tie set up as the middle contour. As you can see there is some variation between all three contour plots. Ideally I want to be able to use the approach in the right plot as this would cut out significant amounts of remeshing. However I do need to justify this approach. 1. Why is there such a difference between plot results? 2. Has this approach been used by others and if so why? 3. Is the contact tie approach acceptable for this application? 4. Are there any published references which can be used to support this approach? Any help is always appreciated, I don't always get a notification when people reply so apologies if there is a delay. Kindest regards Andy
  2. Hello ! I am new to fatigue analysis in optistruct. For reference, I have followed the instructions as provided in the help file and with the same model as used in there (link has been provided for reference). I have been facing analysis failure with error code #6971. I have attached the screenshot of the error. Can anyone state the possible cause for this ? Help File Link : https://altairhyperworks.com/hwhelp/Altair/2017/help/hm/hwsolvers.htm?fpm_en_strain.htm Regards Venkatesh
  3. How to model fillet weld in the model? How to model welding in assembly?How to connect the components which are connected by welding?
  4. Hi, I´m trying to simulate a weld with the seam panel to connect a t-joint. The t-joint consists of two plates which are meshed with solids. The two plates are selected for the “components”. For the seam weld I´m using the „penta (MIG + T)“-type. When I want to realize the seam weld I always get the message “Failed: Link entity 1 (comp id 1) and link entity 2 (comp id 2) do not have projections”. Is someone able to tell me what´s the problem and how can I fix this? Many thanks in advance for your help! Regards Nina
  5. Hi guys, can someone say me what are the properties of the different connectors. Or give me a link where they are discribed, sadly i found nothing in the Help or web.
  6. I have to model weld elements in radioss what is the best way to model it should i give node to node connectivity or rigids Both spot weld and Seam weld are present along with fillet of different radius. what technique should i prefer for modelling?
  7. Hi, I would like to connect the "bracing_1" to "bracing_2" and connect the "bracing_2" to "flange" component, representing a weld, without remeshing any of them. I've tried spot, seam and area connectors with various options but none of them worked, after running the simulation, the connected components weren't constrained together. What is the most simple method to connect components with non-connecting mesh? Thank you aecyd tubes.zip
  8. For Modal and Stiffness(torsional and bending) of ladder frame chassis, is there any significant difference in results when I use stick contact between frame and cross-members or when I use shell/rigid weld elements to connect cross-members and long members?
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