NX Laminates
NX Laminates
(OP)
Using NX7, and my question is about locating and specifying laminate properties. I am new to NX, but not to CAD and I have sifted through the documentation plenty.
When defining a woven laminate ply material, NX makes you specify the warp and weft independently as two different materials. What is the standard method for inputing the elastic constants (E,G,v)? Creating two isotropic materials to represent the warp and weft directional properties?
Also, where are mechanical properties (elastic constants) for commercial materials, such as plain weave fiberglass, found? Do you have to get this from the yarn properties?
Thanks!
When defining a woven laminate ply material, NX makes you specify the warp and weft independently as two different materials. What is the standard method for inputing the elastic constants (E,G,v)? Creating two isotropic materials to represent the warp and weft directional properties?
Also, where are mechanical properties (elastic constants) for commercial materials, such as plain weave fiberglass, found? Do you have to get this from the yarn properties?
Thanks!





RE: NX Laminates
RE: NX Laminates
My method is to input for warp and weft each half the density you get considering the raw fabric thickness and area density, such as 5oz/yd^2. The balance coefficient k, I assume, is given by warp/(warp+weft).
RE: NX Laminates
The warp and weft fiber materials are not necessarily different, but they can be. The warp fiber material is an orthotropic material defining the 0 and 90 degree properties of the warp material. The weft fiber material is an orthotropic material defining the 0 and 90 degree properties of the weft material: Note that the 0 degree properties of the weft material are clocked from the 0 degree of the Warp by the Weft Fiber Angle.
You are right about the balance coefficient.
You typically get fiber and matrix properties from a pre-preg supplier.
RE: NX Laminates
For a woven material, you can specify density of the fiber and matrix, but how does it "capture" the weight value that is traditionally given in oz/yd^2 for the cloth alone?
RE: NX Laminates