It is a little known fact that most (all?) of the analysis for sandwich panels – Mil-Hdbk-23, NASA Papers and many different OEM stress manuals are based on the work done 50 years ago by the Forest Products Laboratory.
This excellent work was collected in a series of reports and put on a US government server and largely forgotten about. I came across them researching the text book, delving into the references cited in other classic sandwich panel references.
These references are priceless in that they represent the earliest public domain derivation of the classical analysis methods in wide use today. They are also very well laid out and easy to follow – unlike many other references. I have taken the mathematical curve derivations for the general cases in these references and constructed the curved from scratch and they work beautifully.
I will upload those spreadsheets as soon as they are ready. This great series of references can be found HERE.
To try our free Stress Analysis Engineering Spreadsheets click below
To try our Add-in for Microsoft Excel for Windows click below