By Tom Bitzer (auth.)
Honeycomb Technology is a advisor to honeycomb cores and honeycomb sandwich panels, from the producing equipment in which they're produced, to the differing kinds of layout, functions for utilization and techniques of checking out the fabrics. It explains the differing kinds of honeycomb cores on hand and offers tabulated facts in their homes. the writer has been interested by the trying out and layout of honeycomb cores and sandwich panels for almost 30 years. HoneycombTechnology displays this through emphasizing a `hands-on' technique and discusses methods for designing sandwich panels, explaining the mandatory equations. additionally incorporated is a bit on tips on how to layout honeycomb strength absorbers and one complete bankruptcy discussing honeycomb center and sandwich panel checking out. Honeycomb Technology could be of curiosity to engineers within the plane, aerospace and construction industries. it is going to even be of significant use to engineering scholars drawn to uncomplicated sandwich panel design.
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Extra resources for Honeycomb Technology: Materials, Design, Manufacturing, Applications and Testing
Honeycomb toughness and proportional limits The honeycomb strengths given in product brochures are always ultimate failure stresses. Normally a test laboratory conducts the core tests only to achieve the maximum load and the initial straight line portion of the loaddeflection curve from which the modulus is determined. 14. 8. 17. T. T. = room temperature. T. T. = room temperature. -----------------------------------------. S/ 25 5 0 0 0 " . . . V / \. -. /"'. ~. ~. 1000~,:~· O~-+--~~--~~~--+--+--T-~~~~~~ o 2 4 14 12 10 6 8 Deflection (in.
Other reasons to fill the honeycomb cells are to prevent moisture and water from getting into the cells and to stabilize the cell walls for carving various shapes. Also, on tapered sections (such as trailing edges) the foam gives the honeycomb more lateral strength and stiffness. Usually in these cases the foam is foamed in place in the honeycomb; polyimide or cyanate foams are sometimes used. At first it was thought that by filling honeycomb with foam, the foam would prevent the core cell walls from buckling and drastically increase the honeycomb strength.
S/ 25 5 0 0 0 " . . . V / \. -. /"'. ~. ~. 1000~,:~· O~-+--~~--~~~--+--+--T-~~~~~~ o 2 4 14 12 10 6 8 Deflection (in. x 10-4 ) Figure 2,15 Stabilized compression load-