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spggodd
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Homework Statement
I have a laminate subject to 3 forces and 3 moments:
- Nx = normal force resultant in the x direction (N/m)
- Ny = normal force resultant in the y direction (N/m)
- Nxy = shear force resultant (N/m)
- Mx = Bending moment resultant in the x direction (Nm/m)
- My = Bending moment resultant in the y direction (Nm/m)
- Mxy = Turning moment resultant (Nm/m)
- Factor of safety of each ply and the whole laminate based on maximum stress criterion
- Factor of safety of each ply and the whole laminate based on Energy Based Interaction Theory – Tsai-Hill Criterion
- Factor of safety of each ply and the whole laminate based on Interactive Tensor Polynomial Theory - Tsai-Wu Criterion
Homework Equations
Compliance/Stiffness matrix methods.
The Attempt at a Solution
I think I am supposed to use the stiffness/compliance matrix method to work out the stresses in the global co-ordinates. However I have done this for 3 forces but I'm not sure how to combine this with moments?
Do I have to extend the matrices from 3x3 to include the moments somehow?