Study on Equivalent Elastic Properties of Ribbed Minimal Surface Lattice Structures Based on Additive Manufacturing
In recent years,with the rapid development in additive manufacturing(AM)technique,a series of porous structures with complex geometries can be manufactured.Lightweight design based on three-dimensional lattice structure is expected to bring a new method to the weight reduction of liquid rocket engines.This paper investigates the equivalent elastic parameters of the primitive triply periodic minimal surface(P-TPMS)structure and its ribbed primitive triply periodic minimal surface(RP-TPMS),as well as the deformation behavior and the influence of relative density changes on both.An analytical model has been proposed,which can efficiently and accurately predict the equivalent elastic properties of the RP-TPMS lattice structure according to the P-TPMS lattice and ribbed equivalent elastic properties,greatly improving the calculation efficiency equivalent elastic properties of the RP-TPMS.Based on the finite element method,by comparing the calculation results of the P-TPMS structure with the RP-TPMS lattice structure,showing that the vertical ribbed design can effectively improve the equivalent elastic properties of the P-TPMS structure.
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