Purpose of calculation:
Consider a cantilever beam with a load applied at the free end. The applied load creates a bending moment which is a maximum at the fixed end, and a shear force along the length of the beam. In a sandwich panel these forces create tension in the upper skin and compression in the lower skin. The core spaces the facing skins and transfers shear between them to make the composite panel work as a homogeneous structure.
Calculation Reference
HexWeb SANDWICH DESIGN MANUAL
Calculation Validation
Reproduced result published in manual.
Calculation Procedure
The following face materials can be selected using a drop down combo box (you could also add your own).
The following core materials can be selected using a drop down combo box (you could also add your own).
1) Determine Panel Properties
2) Beam Loading Assessment. The following beam loading conditions can be selected using a drop down combo box:
L1) Simple Support with Uniform Load Distribution
L2) Both Ends Fixed with Uniform Load Distribution
L3) Simple Support with Central Load
L4) Both Ends Fixed with Central Load
L5) Cantilever with Uniform Load Distribution
L6) Cantilever with Load at End
L7) Cantilever with Triangular Load Distribution
3) Equivalent plate properties for use with finite element software
It is possible to use the following equivalent plate element properties to match stress and deflection with standard plate elements using finite element analysis software. This should only be done if you can assure that the following conditions are true:
Shear deflections are negligible compared to bending deflections.
Strength of core material is independently checked.
Calculation Reference
Composites Design
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