Journal of Guangdong University of Technology ›› 2022, Vol. 39 ›› Issue (04): 83-90,97.doi: 10.12052/gdutxb.220006

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Quasi-static Compressive Mechanical Behaviors of Perforated Hollow-Sphere Structures

Dai Mei-ling1, Cheng Cheng1, Wu Zhi-wen1, Lu Zhen-wei1, Lu Jie-xun1, Yang Jian1, Yang Fu-jun2   

  1. 1. School of Civil and Transportation Engineering, Guangdong University of Technology, Guangzhou 510006, China;
    2. School of Civil Engineering, Southeast University, Nanjing 210096, China
  • Received:2022-01-11 Online:2022-07-10 Published:2022-06-29

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Abstract: Due to the advantages of ultra-light, high specific strength and good cushioning performance, hollow-sphere materials have a large demand in the fields of aerospace, automobile safety and so on. Its mechanical properties are mainly affected by the microstructure. Quasi-static compressive properties of 3D printed hollow-sphere structures with perforations were investigated experimentally and numerically. The effects of cell number, hole diameter and spheres packing pattern on the mechanical properties of structures with two connections were mainly analyzed. The results confirm that the deformation process of perforated hollow-sphere structures includes the linear elastic stage, large plastic deformation stage and densification stage; when the number of cells in the structure reaches 3×3×3, the mechanical properties are basically independent of the cell number; in general, the specific modulus and strength of the structure having connection necks are larger than those of the structure having no connection neck, while the specific energy absorption of the structure having no connection neck is larger than that of the structure having connection necks; The compressive performance of face centered cubic (FCC) structure is superior, followed by body centered cubic (BCC) structure, and the performance of simple cubic (SC) structure is the weakest; the specific modulus, specific strength and specific energy absorption of simple cubic and body centered cubic structures are linear with the hole diameter, and nonlinear for face centered cubic structures. It provides a reference for hollow sphere materials design and applications.

Key words: hollow-sphere material, 3D printing, mechanical property, energy absorption, numerical simulation

CLC Number: 

  • O341
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