Measuring Core/Facesheet Bond Toughness in Honeycomb Sandwich Structures

NASA/TP-2006–214713, Nettles, A.T., Measuring Core/Facesheet Bond Toughness in Honeycomb
Sandwich Structures, George C. Marshall Space Flight Center Marshall Space Flight Center, AL 35812, National Aeronautics and Space Administration Washington, DC 20546–0001, December 2006, pp. 64, Format(s): PDF 24768k

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This study examines two test methods to evaluate the peel toughness of the skin to core debond of sandwich panels. The methods tested were the climbing drum (CD) peel test and the double cantilever beam (DCB) test. While the CD peel test is only intended for qualitative measurements, it is shown in this study that qualitative measurements can be performed and compare well with DCB test data. It is also shown that artificially stiffening the facesheets of a DCB specimen can cause the test to behave more like a flatwise tensile test than a peel test.

Keywords:	sandwich structures, mode i, honeycomb, fracture toughness
Subjects:	Chemistry and Materials: Composite Materials: Composite Materials
ID Code:	739
Deposited On:	22 May 2007

Measuring Core/Facesheet Bond Toughness in HoneycombSandwich Structures

Measuring Core/Facesheet Bond Toughness in Honeycomb
Sandwich Structures