Which MAT to use for brittle material
Hello! I’m trying to do a simple simulation of distributed force on aluminosilicate glass (E=74 kN/mm^2) with RADIOSS bulk data.
- Can you tell me what MAT is suitable as I couldn’t find one that especially refers to brittle materials? (The closest I could find is MAT1 or MATX27)
- How do I create distributed load? Do I make separately put a force on each node?
Thank you in advance.
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- A simpler explanation for bulk and block data. I have read this forum page http://forum.altairhyperworks.com/index.php?/topic/1813-the-difference-between-bulk-and-block-format/
Is block data more for big, sudden impact compared to bulk data? - What information do I need to decide whether my analysis should use bulk or block data?
Thank you for your kind reply J . Can you also advice me on
we no longer have the differentiation between RADIOSS bulk and block,
HyperWorks ships with two major structural solvers, namely Optistruct and RADIOSS
You will use Optistruct for implicit analysis and optimization and RADIOSS for explicit FEA to put it simply, so you can make the choice based on if it is implict or explicit analysis that you need to do,
thank you for your swift reply. if you don't mind please let me ask some more questions. i would like to simulate distributed forces acting on the center on the top of a simple square solid glass which is placed on something that doesn't break or move (i.e. rigid body).
1) Does constraining dof1,2,3,4,5,6 on all the nodes on the bottom of the glass model ( a simple square solid) does the trick?
2) If the answer for question 1) is yes, is this true regardless of the mesh size?
When you place one object on another, it is still possible that the object can slide on it, if this is also not possible in your model, then constraining is one way to go and it is irrespective of reasonable variations in the mesh size.
You can create a rigid body and then use contacts,
you can easily create rigid bodies in RADIOSS
you can create a plate of shell elements and give it very high modulus so that it behaves like a rigid in Optistruct.
You can apply a distributed load by dividing the load by the number of nodes and applying this value to each node,
perhaps law 27, however I would suggest you see the RADIOSS theory manual, chapter 8 - within RADIOSS help, just go to
RADIOSS > Theory Manual:
Large Displacement Finite Element Analysis