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How to know direction of positive Ply Angle in Laminate Simulation

Experimenter
Experimenter

Hey Guys,

 

I am using NX-Laminate and Optimization to determine the optimum Laminate stacking of a part.

 

I know the 0°-Orientation (1-Orientation = Direction of Fiber) is equal to the material orientation set in the Mesh Associate Data.

I guess the 3-Orientation (Thickness-Direction of Laminate) is equal to the Shell-Element-Normal.

But how do I know which way the 2-Direction (90°-Direction = orthogonal to fiber) lies?

Maybe its a stupid question, but I just cant get my head around which way my negative and positive ply angles go.

 

Does the work COS matter or can i make a right-hand COS out of the 1- and 3-Axis?

 

kind regards

Sam

1 REPLY

Re: How to know direction of positive Ply Angle in Laminate Simulation

Siemens Phenom Siemens Phenom
Siemens Phenom

You are correct. The 3 direction is the element normal, implied from the element connectivity. The 1 direction is the angle from the element first edge (if using THETA) or the projection of the MCID X axis onto the element face.

 

The 2 direction is given by the cross product of 3 and 1 (right hand rule)