PSI - Issue 25

Aleksandr Shalimov et al. / Procedia Structural Integrity 25 (2020) 386–393 Author name / Structural Integrity Procedia 00 (2019) 000–000

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level-set method. Models of mechanical behavior were implemented in finite elements using ABAQUS with UMAT subroutine specifying materials properties degradation controlled by maximal stress criterion. The results showed that due to prevailing role of geometrical characteristics and strength properties of the individual ligaments, the damage accumulation processes are affected by the size and volume fraction of structures. The higher volume fraction and increasing RVE size could lead to formation of the zones of stress concentrators that could interfere and alter the failure processes rate. Thus, the RVE fracture should be further studied with account of randomness of microstructural morphology. Acknowledgements The research was performed at Perm National Research Polytechnic University, with the support of the Russian Science Foundation (project №18-71-00135). References 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 Berk, N.F., 1987. Scattering properties of a model bicontinuous structure with a well defined length scale. Phys. Rev. Lett. 58, 2718–2721. https://doi.org/10.1103/PhysRevLett.58.2718 Cahn, J.W., 1965. Phase separation by spinodal decomposition in isotropic systems. J. Chem. Phys. 42, 93–99. https://doi.org/10.1063/1.1695731 Grenestedt, J.L., Bassinet, F., 2000. Influence of cell wall thickness variations on elastic stiffness of closed-cell cellular solids. Int. J. Mech. Sci. 42, 1327–1338. https://doi.org/10.1016/S0020-7403(99)00054-5 Jung, A., Chen, Z., Schmauch, J., Motz, C., Diebels, S., 2016. Micromechanical characterisation of Ni/Al hybrid foams by nano- and microindentation coupled with EBSD. Acta Mater. 102, 38–48. https://doi.org/10.1016/j.actamat.2015.09.018 Jung, A., Diebels, S., 2017. Microstructural characterisation and experimental determination of a multiaxial yield surface for open-cell aluminium foams. Mater. Des. 131, 252–264. https://doi.org/10.1016/j.matdes.2017.06.017 Li, K., Gao, X.-L., Subhash, G., 2006. Effects of cell shape and strut cross-sectional area variations on the elastic properties of three-dimensional open-cell foams. J. Mech. Phys. Solids 54, 783–806. https://doi.org/10.1016/j.jmps.2005.10.007 Matheson, K.E., Cross, K.K., Nowell, M.M., Spear, A.D., 2017. A multiscale comparison of stochastic open-cell aluminum foam produced via conventional and additive-manufacturing routes. Mater. Sci. Eng. A 707, 181–192. https://doi.org/10.1016/j.msea.2017.08.102 Petit, C., Maire, E., Meille, S., Adrien, J., 2017. Two-scale study of the fracture of an aluminum foam by X-ray tomography and finite element modeling. Mater. Des. 120, 117–127. https://doi.org/10.1016/j.matdes.2017.02.009 Shunmugasamy, V.C., Mansoor, B., 2018. Compressive behavior of a rolled open-cell aluminum foam. Mater. Sci. Eng. A 715, 281–294. https://doi.org/10.1016/j.msea.2018.01.015 Siegkas, P., Petrinic, N., Tagarielli, V.L., 2016. Measurements and micro-mechanical modelling of the response of sintered titanium foams. J. Mech. Behav. Biomed. Mater. 57, 365–375. https://doi.org/10.1016/j.jmbbm.2016.02.024 Zhou, J., Allameh, S., Soboyejo, W.O., 2005. Microscale testing of the strut in open cell aluminum foams. J. Mater. Sci. 40, 429–439. https://doi.org/10.1007/s10853-005-6100-8