Optimization design of a functionally graded lattice sandwich structure based on gradient factor

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (23) : 98-103.

ZHU Lingxue1,WANG Tongyin2,ZHU Xiaolei2

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Abstract

The energy absorption performance of a functionally graded lattice sandwich structure was studied based on gradient factor.The effects of face-sheet gradient factor and core one on the energy absorption performance of the graded structure were investigated,respectively using the FE simulation software ANSYS/LS-DYNA.The gradient factor was taken as the optimization variable and the surface specific energy absorption was taken as the optimization objective,the optimization of the graded structure was performed with the genetic algorithm.The results showed that changes of gradient factor affect the structure’s deformation mode; the influence of face-sheet gradient factor on the surface specific energy absorption is large; due to constraints of face-sheet structure on core deformation,the influence of the core graded factor is smaller; compared with non-graded structure,the energy absorption value of the graded structure after optimization increases by 100%; the results provide a guide for improving the blast resistance performance of lattice sandwich structures.

Key words

Gradient factor / Lattice sandwich structure / Energy absorption characteristic / Optimization design

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ZHU Lingxue1,WANG Tongyin2,ZHU Xiaolei2. Optimization design of a functionally graded lattice sandwich structure based on gradient factor[J]. Journal of Vibration and Shock, 2018, 37(23): 98-103

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