Difference between 2D and 3D composite material assign

Updated Oct 4, 2020 by Altair Forum User

Hi guys,

Im currently working in composite modelling.

So basically in 3D we model the composite plys as a single layer of 3D element regardless of material orientation and the number of ply layer. In my case, I am using (carbon fibre reinforced epoxy-CFRE) 4 layers of carbon fibre with epoxy as the matrix. Therefore, I can just apply a single material properties obtained from the tensile test of the combined material and assign the material under the PSOLID property. Am I correct about this statement?

And in 2D modelling using the hypercomposite we are able to arrange the plys sequence and orientation. But how are we going to apply the material properties for each ply? can I use the material properties data obtained from the tensile test of 4 layers carbon fibre or I have to do tensile test for 1 layer of carbon fibre and assign the data to each ply?

I'm confused about this. Please help.

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New Altair Community Member

Unable to find an attachment - read this blog

Updated Mar 14, 2019 by Rahul Rajan_21763

Please refer to attached document on composites. This document is written by referring OptiStruct 2017.2.4.

Altair Employee

Updated Mar 14, 2019 by Altair Forum User

Thank you for the note. I will look into it. Btw, is my statement correct about the 2D 3D?

New Altair Community Member

Updated Mar 14, 2019 by Rahul Rajan_21763

Your statement is not correct for 2d and 3d.Will reply shortly with some examples.

Altair Employee

Updated Mar 14, 2019 by Altair Forum User

Thank you very much mr. Rahul. Really appreciate it.

New Altair Community Member

Unable to find an attachment - read this blog

Updated Mar 14, 2019 by Rahul Rajan_21763

Please refer attached material for 2d and 3d composites.2d with MAT8 and PCOMPP & 3d with MAT9ORT and PCOMPLS

Altair Employee

Mar 15, 2019

Updated Mar 15, 2019 by Altair Forum User

Thank you very much. I will try the example provided. Really appreciate it

Altair Employee

Mar 17, 2019

Updated Mar 17, 2019 by Altair Forum User

Mr Rahul. I tried to understand and follow the example you provided. I got the idea now.

Just on the material part. Im still a bit confuse about the layer material properties. For the material properties like young's modulus, Poisson ratio, shear modulus and others, the value that I should input is the value from the tensile experiment in conducted right? Since I have to input the material for each layer, the data should be the one I got from the 4 layers of tensile test or only 1 layer of tensile test?