The performance characteristics of kagome lattice truss core sandwich panel made of TC4 titanium alloy has been investigated in this paper. The sandwich panel was fabricated using 3D printing technology and test in out-of-plane compression. The compressive stiffness and the maximum capacity of compressive load were obtained through experiments. The plastic bending deformation of the strut members of the core was observed and finite element method (FEM) simulation of the compression test was performed to demonstrate the mechanism of this bending deformation that is plastic buckling. An analytical model was developed in this study to predict the compressive stiffness and compressive strength of the sandwich panel. The theoretical predictions results are in good agreement with experimental results and the FEM results based on the plastic buckling of the struts. With the help of the analytical model developed and finite element method, the effect of the material's moduli, the angle between the struts and the top/bottom sheets, the relative density of the core on the compressive response of the sandwich panel have been investigated and the results reveal that the lattice truss core sandwich panels with greater elastic moduli, greater angle between struts and sheets, and greater relative density outperform than the ones with these parameters smaller.
Mechanical behaviour of titanium sandwich structures with kagome lattice truss cores
01.07.2017
479015 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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