laminate composite, bricks & MAT9
laminate composite, bricks & MAT9
(OP)
Hi there!
I'm trying to model a laminate composite by means of 1 layer of bricks and using a MAT9 card for this. The question is: Gij terms point to Ex,Ey,Ez,Gxy,Gyz,Gxz and the poisson's ratios of the entire laminate. I think Ex, Ey, Gxy and Nuxy can be obtained using the classical laminate theory for 2D, but how about the other terms?
I think Ez can be estimated considering the laminate like serial springs. Does anyone know where can I find something about this?
The laminate is made of 12 layers, fabric and tape and the known constants are E1,E2,N12 and G12.
Thanks!
I'm trying to model a laminate composite by means of 1 layer of bricks and using a MAT9 card for this. The question is: Gij terms point to Ex,Ey,Ez,Gxy,Gyz,Gxz and the poisson's ratios of the entire laminate. I think Ex, Ey, Gxy and Nuxy can be obtained using the classical laminate theory for 2D, but how about the other terms?
I think Ez can be estimated considering the laminate like serial springs. Does anyone know where can I find something about this?
The laminate is made of 12 layers, fabric and tape and the known constants are E1,E2,N12 and G12.
Thanks!





RE: laminate composite, bricks & MAT9
RE: laminate composite, bricks & MAT9
thanks!
RE: laminate composite, bricks & MAT9
see my replies here thread327-136351
also, using one liniar solid element thru the lamiante thickness is a very bad idea if you have any bending loads/deformation on your structure. In general, solid elements are very poor in bending. What are you trying to model and what results are you trying to obtain?
Steve
RE: laminate composite, bricks & MAT9
Im trying to modelate a single lap shear composite adhesive union, for several reasons the composite is gonna be modeled with bricks and also the adhesive. The material is AS4/8552 fabric and tape and the stacking sequence is:
Fabric(+-45)
Fabric(+-45)
Tape (0)
Tape (0)
Fabric (0/90)
Fabric(+-45)
Symetric
Can I use the recomendations given in those post?