PSI - Issue 82

Victor Rizov et al. / Procedia Structural Integrity 82 (2026) 253–259 V. Rizov/ Structural Integrity Procedia 00 (2026) 000–000

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4. Conclusions A theoretical analysis of delamination in a three-layered double clamped column under subsidence of its lower end is performed. Since the column is statically indeterminate, the subsidence induces stresses. The SERR is determined with considering the symmetry (there are two delamination cracks situated symmetrically with respect to the column axis). The column exhibits relaxation behaviour under constant strains. The solution of the SERR derived here incorporates three important factors, namely subsidence of the column, relaxation behaviour and continuous material inhomogeneity of column layers. The influence of these factors of the SERR is investigated. It is found that the growth of the subsidence magnitude causes a rapid increase of the SERR. The relaxation generates a smooth reduction of the SERR with time. The growth of the delamination length leads to rise of the SERR (this is a result of the reduction of values of material properties along the length of the layers). References Dolgov, N., 2005. Determination of Stresses in a Two-Layer Coating. Strength of Materials 37, 422-431. Dowling, N., 2007. Mechanical Behavior of Materials. Pearson. Gasik, M.M., 2010. Functionally graded materials: bulk processing techniques. International Journal of Materials and Product Technology 39, 20-29. Kaul, A. B., 2014. Two-dimensional layered materials: Structure, properties, and prospects for device applications. J. Mater. Res. 29, 348-361. Lloyd, S.J., Molina-Aldareguia, J. M., 2003. Multilayered materials: a palette for the materials artist. Phil. Trans. R. Soc. Lond. A 361 , 2931 294. Mahamood, R. C., Akinlabi, E. T., 2017. Functionally Graded Materials. Springer. Radhika, N., Sasikumar, J., Sylesh, J. L., Kishore, R., 2020. Dry reciprocating wear and frictional behaviour of B4C reinforced functionally graded and homogenous aluminium matrix composites. Journal of Materials Research and Technology 9, 1578-1592. Rizov, V. I., 2018. Non-linear delamination in two-dimensional functionally graded multilayered beam. International Journal of Structural Integrity 9, 646-663. Rizov, V.I., 2018. Analysis of cylindrical delamination cracks in multilayered functionally graded non-linear elastic circular shafts under combined loads. Frattura ed Integrità Strutturale 46, 158-17. Rizov, V.I., 2019. Influence of material inhomogeneity and non-linear mechanical behaviour of the material on delamination in multilayered beams. Frattura ed Integrità Strutturale 47, 468-481. Rzhanitsyn, A.R., 1986. Built-up Bars and Plates. Stroyiizdat. Toudehdehghan, J., Lim, W., Foo1, K. E., Ma’arof, M. I. N., Mathews J., 2017. A brief review of functionally graded materials. MATEC Web of Conferences 131, 03010.