composite modeling

[kotawsu]

hello, i am using solid elements to model a composite laminate which consists of 18 layer of plies. so does it mean that i just have to create 18 partitions and then assign the material coordinate system according to the fibre orientation and then give the composite properties. my doubt is about partitioning?? thanks.
Kota

 

[harry123456]

Hi,
I recently did composite modeling, not with abaqus though. If I understand your question, you are saying create the solid model and dividie it into 18 parts and then assign orientation + props. I think you can assign a section directy to the model. The section will have the appropriate prop. and fiber orientation for all the 18 plies. Though usually a shell model is easier. Go through the abaqus examples problems manual 6.4. Type "composite" in the search and see the examples that come up. I think they might clear your doubts.
harry

 

[kotawsu]

the problem with shell modeling is i would not be able to visualise the interlaminar stresses as the thickenss is not given through the node but it is defined through the section points. i would be able to visualise only the top and the bottom of the shell. Please correct me if i am wrong..
Kota

 

[harry123456]

I am not sure about abaqus but when I did my analysis in ansys the element by default showed stresses at the top and bottom of the layer but by changing that key option for that element to let it store stresses for all layers instead of just top and bottom I could see all the interlaminar stresses. Though again I would say I am also a newbie to composite analysis so please bear with me if am wrong in some suggestions.
harry

 

[kotawsu]

Could anybody tell me suppose i use 3d-deformable planar to model a 18 layer laminate what should i do to get the interlaminar stresses. I have observed that i can get the top and the bottom section points in visualization.Thanks.
Ananth