PSI - Issue 37

Nataliya Elenskaya et al. / Procedia Structural Integrity 37 (2022) 692–697 Nataliya Elenskaya / Structural Integrity Procedia 00 (2019) 000 – 000

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According to the data obtained, the most pliable mechanical behavior for both loading types is demonstrated by the structure ( ) 03 , , G x y z  with the volume fraction changing from 50 to 70 %. The most rigid behavior is observed in the structure ( ) 01 , , G x y z  with volume fraction of the porous phase varies from 0 to 50%. The influence of porosity gradient is clearly demonstrated not only by facts of occurrence of damage, but also by linearity/nonlinearity of mechanical response. In case of compression loading, the structure with 50%-70% porosity gradient demonstrated effective linear elastic behavior before first fracture event, while plasticity deformation started in two others. In case of shear loading all three structures were predominantly in elastic zone before fracture. 4. Conclusions The open-cell gyroid-type structures with a porosity gradient were studied. Their elastoplastic mechanical behavior was numerically simulated using the Johnson-Cook model. Mechanical response of the structures subjected to compressive and shear loading was compared. Finite element models were implemented in Abaqus. The obtained results demonstrate the possibility of implementation of different elastoplastic mechanical behavior of open-cell porous cellular structures by variation of the porosity gradient. Acknowledgements The authors gratefully acknowledge financial support from the Government of the Russian Federation under the mega-grant program, contract no. 075-15-2021-578 of May 31, 2021, hosted by Perm National Research Polytechnic Bargmann, S., Klusemann, B., Markmann, J., Schnabel, J.E., Schneider, K., Soyarslan, C., Wilmers, J., 2018. Generation of 3D representative volume elements for heterogeneous materials: A review. Prog. Mater. Sci. 96, 322 – 384. https://doi.org/10.1016/j.pmatsci.2018.02.003 Chen, F., Ou, H., Lu, B., Long, H., 2016. A constitutive model of polyether-ether-ketone (PEEK). J. Mech. Behav. Biomed. Mater. 53, 427 – 433. https://doi.org/10.1016/j.jmbbm.2015.08.037 Liu, F., Mao, Z., Zhang, P., Zhang, D.Z., Jiang, J., Ma, Z., 2018. Functionally graded porous scaffolds in multiple patterns: New design method, physical and mechanical properties. Mater. Des. 160, 849 – 860. https://doi.org/10.1016/j.matdes.2018.09.053 Montgomery, S.M., Kuang, X., Armstrong, C.D., Qi, H.J., 2020. Recent advances in additive manufacturing of active mechanical metamaterials. Curr. Opin. Solid State Mater. Sci. 24, 100869. https://doi.org/10.1016/j.cossms.2020.100869 Panesar, A., Abdi, M., Hickman, D., Ashcroft, I., 2018. Strategies for functionally graded lattice structures derived using topology optimisation for Additive Manufacturing. Addit. Manuf. 19, 81 – 94. https://doi.org/10.1016/j.addma.2017.11.008 Rahman, K.M., Letcher, T., Reese, R., 2015. Mechanical properties of additively manufactured peek components using fused filament fabrication, in: ASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE). American Society of Mechanical Engineers (ASME). https://doi.org/10.1115/IMECE2015-52209 Smith, J.A., Mele, E., Rimington, R.P., Capel, A.J., Lewis, M.P., Silberschmidt, V. V, Li, S., 2019. Polydimethylsiloxane and poly(ether) ether ketone functionally graded composites for biomedical applications. J. Mech. Behav. Biomed. Mater. 93, 130 – 142. https://doi.org/10.1016/j.jmbbm.2019.02.012 Su, Y., He, J., Jiang, N., Zhang, H., Wang, L., Liu, X., Li, D., Yin, Z., 2020. Additively-manufactured poly-ether-ether-ketone (PEEK) lattice scaffolds with uniform microporous architectures for enhanced cellular response and soft tissue adhesion. Mater. Des. 191, 108671. https://doi.org/10.1016/j.matdes.2020.108671 Tashkinov, M.A., 2021. Multipoint stochastic approach to localization of microscale elastic behavior of random heterogeneous media. Comput. Struct. 249, 106474. https://doi.org/10.1016/j.compstruc.2020.106474 Zhang, X.Y., Yan, X.C., Fang, G., Liu, M., 2020. Biomechanical influence of structural variation strategies on functionally graded scaffolds constructed with triply periodic minimal surface. Addit. Manuf. 32, 101015. https://doi.org/10.1016/j.addma.2019.101015 University. References