Fig. 1. Cell element types. (a) BCC; (b) BCCZ; (c) FCC; (d) FCCZ

Fig. 2. Model of body-centered cubic porous structure

Fig. 3. Finite element models of porous structure. (a) Wire model of porous structure; (b) model with specified section

Fig. 4. Finite element model after assembly

Fig. 5. Smooth step curve

Fig. 6. Energy curves of body-centered cubic porous structure. (a) BCC 0.4; (b) BCC 0.6; (c) BCC 0.8; (d) BCC 1.0；(e) BCC 1.2

Fig. 7. Stress nephograms of body-centered cubic porous structure. (a) BCC 0.4; (b) BCC 0.6; (c) BCC 0.8；(d) BCC 1.0; (e) BCC 1.2

Fig. 8. Displacement nephograms of body-centered cubic porous structure. (a) BCC 0.4; (b) BCC 0.6; (c) BCC 0.8；(d) BCC 1.0; (e) BCC 1.2

Fig. 9. Force-displacement curves

Fig. 10. Stress-strain curves

Fig. 11. Morphology of 316L powder

Fig. 12. Sample of body-centered cubic porous structure formed by LPBF

Fig. 13. Compression test device. (a) Whole machine equipment; (b) partially enlarged drawing

Fig. 14. Macroscopic profiles of body-centered cubic porous structure. (a) BCC 0.4; (b) BCC 0.6; (c) BCC 0.8；(d) BCC 1.0; (e) BCC 1.2; (f) partially enlarged drawing

Fig. 15. SEM images of microscopic profile. (a) Surface topography; (b) partially enlarged drawing

Fig. 16. Stress-strain test curves

Fig. 17. Deformation process of body-centered cubic porous structure under each ε. (a) ε=0; (b) ε=10%; (c) ε=20%; (d) ε=30%; (e) ε=40%; (f) ε=50%; (g) local enlarged view of Fig.7 (c); (h)(i) local enlarged view of Fig.7 (f)

Fig. 18. Mechanical property curves. (a) EBBC*; (b) σ^*