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  1. S

    Buckling with Inertia Relief

    @sdm919 Thank you for your willingness to help. The reason I'm using SUPORT1 is because MSC Nastran documentation mentions it's mandatory to use it for buckling with inertia relief, instead of SUPORT. I ran 4 different conditions: -Model runs fine in the constrained linear static solution...
  2. S

    Buckling with Inertia Relief

    I uploaded the .nas/.dat file below. The model is a hollow cylinder. The skin is meshed with LAMINATE elements. I suppose those are capable of taking moments. I put the SUPORT1 in one node in the skin. I did that just for testing. Here's the .nas/.dat file with the model and complete analysis...
  3. S

    Buckling with Inertia Relief

    I know this question has been asked a few times. I'm sure I checked almost every answer avaiable around. But I'm still having trouble using SOL 105 buckling with inertial relief. Here's the .nas/.dat Nastran file...
  4. S

    Honeycomb Core Properties, Sandwich Composite

    But take a look at the datasheet properties in my first post. Notice from the datasheet the only properties (I circulated them in orange) for honeycomb are: E3 = 75 ksi G12 = 22 ksi G23 = 45 ksi And the compressive strength, and shear strength in the out-of-plane direction. Every manufacturer...
  5. S

    Honeycomb Core Properties, Sandwich Composite

    Hi everyone, Most guidelines I read mention it's possible to model aluminum honeycombs as 2D Orthotropic. Taking a look at manufacturers datasheets, I feel the properties force us to use 3D Orthotropic. But I'm not sure and I'd like your opinion. For example, the properties below are from...

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