Effective Laminate Elastic Engineering Constants

[zoltan117]

When I create an effective laminate for a quasi-iso tropic layup (-45,0,45,90) for tape I dont get the same values for the engineering constants E1 and E2 ie E1 does not equal E2.

Is there a theory manual that shows what assumptions Hypersizer is making when developing the smeared laminate properties?

When I use our internal in-house code E1= E2.

[Phil]

Please see the following link:

http://hypersizer.com/help/Content/Materials/EffLam/el-properties-stiffness.php


The engineering constants come from the inverse of the ABD matrix.  If the B terms are non-zero, it will throw off

Try making the laminate symmetric...  Instead of [-45/0/45/90], make it [-45/0/45/90]s instead.

[zoltan117]

Does hypersizer calculate the correct effective laminate properties for unsymmetric layups?