Forest Products Laboratory Reports – Sandwich Panel analysis

March 21, 2016

FPL ReportsIt 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 foundĀ HERE.



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2 Comments on "Forest Products Laboratory Reports – Sandwich Panel analysis"

  • thanks for making available this history.

    • Our pleasure Kumar, not only is this history but the mathematical derivation of the buckling K curves are widely used across the industry – I have spreadsheet versions of the K generation graphs for shear buckling for the general case that I will be putting on line soon.

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