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mariaserrano

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About mariaserrano

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    Spain
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    Yes
  1. Hi, I have a part where I just want to optimize minimum mass with a maximum node displacement of 2 mm. I have define a dconstraint of static displacement. The problem is that some areas of my part are not going to suffer any loads, so during the Free Size Optimization Altair deletes the plies on those areas (it doesn't delete them, it just gives them a really low thickness value, 0.1% of the initial one). I need my part to have the same shape as the surface that I am importing as a geometry, I just want OptiStruct to give me the optimum ply configuration. How can I assure that? Besides, the optimization is giving me a #312 error when I apply a pressure load, although it doesn't show that error when carrying out a static analysis. What can be the cause of it? Thanks in advance Attached you may find some pictures of what the geometry looks like. The forces and moments are applied in a remote point and transferred to the surfaces where they act through some rigid bars (first picture) and the pressure acts on almost all the surface (second picture).
  2. Hi, I have a question regarding the composite definition in Altair OptiStruct. I have imported a CAD geometry (STEP file) as a solid into HyperMesh. I have then defined the carbon fiber material as a MAT8 material and I am now creating the plies. My question is, how does Altair define the plies on the geometry? As it is a solid, should I specify which elements are part of the ply? This is a picture of what my solid geometry looks like. How can I tell Altair to start stacking the plies from the inner surface of the rim? Thanks in advance
  3. Hi, I'm having the same error. What should I put in the MTXNAME field of the DMIGMOD card? What does it mean? Thanks in advance!
  4. When I try to check the model in OptiStruct, it gives me the following error: ** See next message about line 34 from file: D:/Users/eRacing/Desktop/PFGmaria/Prueba_Altair_Neumatico.fem "DMIGMOD" This line was interpreted as: 34:DMIGMOD *** ERROR # 1000 *** in the input data: Incorrect data in field # 2. Expected STRING, found BLANK. Should I define anything in the DMIGMOD card? Thanks in advance
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