Aluminum Sandwich Panels Torsional Stiffness

Dear All,

Am new here, Engineer by training I evolved to Procurement so my purely Engineering skills faded a bit.

After several research on the web, I did not found a satisfactory answer to my question.

Well, I would like to estimate the torsional rigidity/stiffness of an aluminum composite panel (aluminum skins over aluminum honeycomb). If the result is looking satisfactory, I might possibly do a test.

Could you please advise on the way to calculate this for a simple rectangular panel ?

Thanks a lot

Ayao