Evaluating the Mechanical Properties and Energy Absorption Performance of Fluorite Lattice Structures Inspired by...

This study proposes a hybrid variant of the fluorite lattice structure inspired by the porous architecture of pomelo peel to enhance mechanical properties and energy absorption performance. The effective mechanical properties of the structure were determined through volume homogenization and optimized using a constrained search and sorting method. The energy absorption behavior under axial crushing was investigated through finite element simulations by varying geometric parameters and comparing the proposed structure with several representative lattice topologies. The results indicate that the elastic modulus increases with increasing strut radius while maintaining a slope parameter λ of 0.6. In addition, higher relative density, a greater number of unit cells, and higher compaction velocity were found to improve the predicted energy absorption capability and deformation stability of the structure. Compared with several conventional lattice configurations, the proposed structure exhibits superior specific energy absorption within the investigated design space. However, the material model neglects strain-rate sensitivity and lacks experimental validation; therefore, the reported results are limited to the adopted numerical framework.