Composite Delamination in Nastran
Composite Delamination in Nastran
(OP)
Hello All,
Have anyone done a Composite delamination problem in Nastram before. Any small help would help a lot.
Thanks
VENKIth
Have anyone done a Composite delamination problem in Nastram before. Any small help would help a lot.
Thanks
VENKIth





RE: Composite Delamination in Nastran
RE: Composite Delamination in Nastran
Garland E. Borowski, PE
Borowski Engineering & Analytical Services, Inc.
Lower Alabama SolidWorks Users Group
RE: Composite Delamination in Nastran
DMACX: Modeling as 3D layered in my case would be tedious in my case[too many variations in number of ply and properties]. But, I will use it relatively in smaller test cases. Thanks again!
Borowski: I was thinking of about this method[well, I am doing it actually], but the problem is I donot have a good number to compare with. Well, that's my problem :). Thanks again!
RE: Composite Delamination in Nastran
If it is a unique material system with little or no data, you need to seriously consider a test program. Even if the data is a well-known material, but you are processing it differently (you are using VARTM where others have Autoclaved) or if you are processing using a facility with an unknown "track record", you may still need the test program.
I would comment that DMACX's procedure can probably still be used in your situation. There are many programs that will "smear" the properties of laminates so that you can use 3-D orthotropic elements. In your case, you may use 5 layers with the two outer and the center-most layers being thin. This would allow you to check the tensile stresses and shear stresses at what are generally the critical locations...just a thought.
RE: Composite Delamination in Nastran
RE: Composite Delamination in Nastran
RE: Composite Delamination in Nastran