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Characterization of Bending Stiffness for Honeycomb Sandwich Plate in Three-point Bending Test Using Mechanics of Structure Genome
Abstract
Motivated by the concept of Structure Gene (SG) [1] which is defined as the smallest mathematical building block of a structure, a new approach named mechanics of structure genome (MSG) is applied to characterize the bending stiffness of honeycomb sandwich structure in this paper. The constitutive modeling is conducted over a honeycomb sandwich SG by MSG to obtain the equivalent plate properties. Then, on the one side, analytical formulas are derived to directly calculate bending stiffness by the equivalent flexural rigidity and shear rigidity found in the equivalent plate properties. On the other side, the equivalent plate properties can also be applied to shell element for simulation of bending test, which can be handled by a standard finite element analysis (FEA) package such as Abaqus or ANSYS. The MSG approach including both analytical formula and FEM are compared with experiment and direct numerical simulation (DNS). The results show that MSG approach gives good agreement with experiment and DNS while being much more efficient than DNS. The main improvement of MSG approach lies in the absence of ad hoc assumptions and efficiency for both analytical and FEM prediction.
DOI
10.12783/asc34/31396
10.12783/asc34/31396
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