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shell composites abaqus

shell composites abaqus

shell composites abaqus

(OP)
Hi, I am trying to model with ABAQUS a structure with extreme aspect ratio: talking about a Substrate with aspect Ratio of about 300 (lateral dimensions/thickness) with several films on top of aspect Ratio of about 2 millions (2e6), ie plane vs its thickness.
I managed to do this using the Composite layup feature, however I am now in need of inserting an Initial stress in some of the layers, and also to account for possible delaminations between layers. It si not possible to account for that by using the Composite layup Feature, or I don´t know how to.
I believe I must do several Shells and stack them on top of another.
I have no idea how to do that, and online there is no help for that.
I found an example in the abaqus documentation (example 1.4.9, "postbuckling and growth of delamination in Composite Panels") however I am a new user of Abaqus and learning .cae; the example does not explain how the model is built in cae, gives very few Details. It does give the Input file but I do not know the file language and although I can build the structure by importing the Input file in ABAQUS cae, I cannot from that understand how it was done...
please help !

thanks.

PS: I tried to mdoel the structure also with a 3D model (since it is so difficult to stack Shells....), but it was really not possible, the films aspect Ratio is simply too big...

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