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Method to Design Honeycombs for a Shear Flexible Structure

Journal Article
2010-01-0762
ISSN: 1946-3995, e-ISSN: 1946-4002
Published April 12, 2010 by SAE International in United States
Method to Design Honeycombs for a Shear Flexible Structure
Sector:
Citation: Berglind, L., Ju, J., and Summers, J., "Method to Design Honeycombs for a Shear Flexible Structure," SAE Int. J. Passeng. Cars – Mech. Syst. 3(1):588-597, 2010, https://doi.org/10.4271/2010-01-0762.
Language: English

Abstract:

Conventional geometric parameters of honeycombs (cell height, h, cell length, l, and cell angle, θ) have been used to find effective properties of honeycomb structures. However, these parameters appear to be difficult to control both a target shear stiffness (4 to 4.5 MPa) and a target level of shear strain (~10%) because the parameters are coupled to each other within a constant design space. A method to design hexagonal honeycombs is derived to design for both shear stiffness and shear flexibility independently by replacing the conventional geometric parameters with two new parameters; effective height, R, and horizontal separation, d. A parametric study with commercial software, ABAQUS, is conducted using the two new parameters to investigate their affects on in-plane effective shear stiffness, G₁₂*, and maximum shear strain, (γ₁₂*)max of polycarbonate honeycombs under a fixed overall honeycomb height of 12.7 mm (0.5 in). The suggested method is expected to be applied to design a lightweight component requiring certain levels of shear stiffness and shear strain simultaneously.