PSI - Issue 37

Yifan Li et al. / Procedia Structural Integrity 37 (2022) 49–56 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 6. The crack paths and crack growth details of octet-truss lattices.

The numerical crack paths of octet-truss lattices in different orientations are shown in Fig. 7. The numerical simulation adequately predicted the crack initiation and propagation in lattices in all three orientations. The predicted crack paths for all orientations lattices are consistent with the experimental results shown in Fig. 6. All the struts in lattices failed at the location near to the joint in simulation the same as experiments. Fig. 8 illustrates the mechanical response of lattice structures in different orientations. The displacement and reaction force data were obtained from the reference point coupled to the nodes around top pin hole. It can be seen from Fig. 8 that the numerical results are in good agreement with the experimental results in all three orientations except that the predicted displacements when specimens failed are a little larger than the real ones.

Fig. 7. The numerical crack paths for different orientations lattices.