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MIL-HDBK-23 Core Properties

Sandwich core and adhesive properties from MIL-HDBK-23A, Structural Sandwich Composites (1968, notices to 1974), the handbook that preceded CMH-17 Volume 6. Chapter 2 tabulates flatwise compression and plate shear of balsa, aluminum-foil, glass-fabric, asbestos, plastic-film, paper and foamed cores (average, standard deviation, proportional limit, modulus, specimen counts), the same cores at elevated temperature, heat-resistant and refractory metal honeycombs to 2,400 °F, the statistical minimum values of Table 2-6, and the elastic constants, lap-joint and peel strengths of structural adhesives. Pick a core to see every handbook row for it; a signed-in analyst can keep one row as a core for the sandwich tools, edited or as published.

  • 160 cores from MIL-HDBK-23A tables 2-1 to 2-6, 532 property rows, 90 footnotes as printed

  • Compression strength, proportional limit and modulus; shear strength, proportional limit and modulus in the ribbon (TL) and transverse (TW) directions

  • Wet, elevated-temperature and statistical-minimum rows; adhesive properties of tables 2-7 to 2-9

  • Save a row as a core (ρ, Fc, Ec, FsL, FsW, GL, GW) for sandwich analysis

MIL-HDBK-23 Core Properties

Unit System: /

Core

MIL-HDBK-23A (1968) chapter 2 tables; "at temperature" = elevated-temperature rows in tables 2-3 to 2-5

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References

U.S. Department of Defense (1968). Structural Sandwich Composites. MIL-HDBK-23A, 30 December 1968, with Notices 1–3, 1972–1974.

Kuenzi, E. W. (1955). Mechanical Properties of Aluminum Honeycomb Cores. Report 1849, U.S. Forest Products Laboratory, Madison.

Kuenzi, E. W. (1957). Mechanical Properties of Glass-Fabric Honeycomb Cores. Report 1861, U.S. Forest Products Laboratory, Madison.

Kuenzi, E. W., and Jahnke, W. E. (1959). Mechanical Properties of Some Heat-Resistant Metal Honeycomb Cores. Report 1872, U.S. Forest Products Laboratory, Madison.

Stevens, G. H., and Kuenzi, E. W. (1962). Mechanical Properties of Several Honeycomb Cores. Report 1887, U.S. Forest Products Laboratory, Madison.

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