PSI - Issue 33

Alexey Fedorenko et al. / Procedia Structural Integrity 33 (2021) 652–657 Fedorenko A., Fedulov B., Jurgenson S., Lomakin E./ Structural Integrity Procedia 00 (2019) 000–000

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24600 B31 beam elements are embedded in solid domain via special mesh constraint (Abaqus embedded element) in case of conventional plate. In case of proposed lattice structure 139000 S4R shell elements are embedded in solid domain. An “all with self” general contact concept is used to capture fragments interaction during fracture process.

Fig. 3. Boundary conditions of the problem

3. Simulation results and discussion A comparison of failure modes is presented in Fig.4 for the conventional plate and in Fig.5 for the proposed one through the ductile damage criterion value representation (DUCTCRT) for concrete and steel elements. An important similarity is that the damage initiation occurs in concrete on free edge of the plate, and this location can be reinforced by additional steel cells or sheets. The damage growth in concrete leads to the subsequent global buckling of the steel grid in case on conventional plate. For the proposed plate damage on the edge results multiple buckling of pyramidal lattice and outer sheets in the vicinity of free edge.

Fig. 4. Failure mode of conventional plate under compression: (a) damage on the free edge initiation; (b) final failure mode

Fig. 5. Failure mode of the proposed lattice-based plate under compression: (a) damage initiation on the free edge; (b) final failure mode