Talk Composites - The Forum for Advanced Composites

Any stiffness advantage to laying twill layers at 45 degrees to each other?

http://www.talkcomposites.com/Topic36194.aspx

By Steve Broad - 4/12/2020 7:59:41 AM

It says it all in the subject title really :-)
I am looking to use two layers of 200gm/m2 3K 2x2 Twill Prepreg Carbon on a project (trying to keep weight to a minimum).  Will aligning the layers at 45 degrees to each other increase the stiffness? 
By Steve Broad - 4/12/2020 6:42:09 PM

 
oekmont - 4/12/2020 5:22:10 PM
If the roof is only attached at the 4 corners, maybe. Car parts are usually konkave anyways. This creates far more stiffness than an additional layer, or the orientation of fibres. The differences will likely be very small

Cheers. I will keep it simple then. Two layers of 200gm prepreg with strengthened edges and corners to improve rigidity. What could possibly go wrong :-)