Thank you James for the answer.

If I compare the bending stiffness **Dij** of the effective laminate with the discrete reference laminate the difference is huge.

E.g. **D11**= 56365 (reference laminate)

**D11**= 87644 (With your approache)

I know there is a difference between discrete and effective laminates. The difference is about 50%, I think this difference is too much.

This approache leads to much higher values. For my point of view this is not correct. There is any literature (paper) about that? I have not found any information.

Could you please give me further support?

Thanks!