PSI - Issue 43

Wilfried Becker et al. / Procedia Structural Integrity 43 (2023) 77–82 Author name / Structural Integrity Procedia 00 (2022) 000 – 000

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that directly influence the interphase strength and improve the degree of stress transfer in nanoclay/polymer composites. The thinnest clay and thickest interphase caused the strongest interphase, the opposite largely reduced the degree of stress transfer between the polymer and the nanoclay particle; the very short length also deteriorates the interphase strength (Zare and Rhee, 2020). 4. Conclusions In this study, an analysis of the influence of the interphase properties of nanoclay / polymer nanocomposite structures subjected to axial load on the interphase shear and peel stresses was performed. For this purpose, 2D stress function method has been applied (Petrova et al., 2022). The latter results from analytical solutions for both ISS and IPS. Based on the data in Zhu and Narh (2004) for nanoclay/polymer nanocomposite with interphase layer, it was found, that increasing the value of Young ’s modulus of the interphase does not change significantly the value of the model ISS and IPS in the considered structure. On the other hand, the interphase layer thickness begins to affect the ISS and IPS with an increasing in its value over 25 nm, while ISS decreases, and IPS - increases. It also turned out, that the interphase layer length is the most important parameter, influencing the model ISS and IPS. The obtained results are in agreement with findings in the literature and could be useful for the proper design and safety application of similar nanoclay/polymer composites in industry. Acknowledgments The authors gratefully acknowledge the support of DFG under the project No. BE 1090/48-1 “Some industrial applications for nanocomposites under mechanical and environmental loading” References Fornes, T. D., Paul, D. R., 2003. Modeling Properties of Nylon 6/clay Nanocomposites using Composite Theories. Polymer 44(17), 4993-5013. Guo, F., Aryana, S., Han, Y., Jiao, Y., 2018. A Review of the Synthesis and Applications of Polymer – Nanoclay Composites. Applied Sciences 8, 1696 (29 pages). Heydari-Meybodi, M., Saber-Samandari, S., Sadighi, M., 2015. A New Approach for Prediction of Elastic Modulus of Polymer/nanoclay Composites by Considering Interfacial Debonding: Experimental and Numerical Investigations. Composites science and technology 117, 379-385. Heydari-Meybodi, M., Saber-Samandari, S., Sadighi, M., 2016. 3D Multiscale Modeling to Predict the Elastic Modulus of Polymer/nanoclay Composites Considering Realistic Interphase Property. Composite Interfaces 23(7), 641-661. Kirilova, E., Petrova, T., Becker W., Ivanova J., 2019. Mathematical Modelling of Stresses in Graphene Polymer Nanocomposites under Static Extension Load, 2019 IEEE 14th Nanotechnology Materials and Devices Conference (NMDC), Stockholm, Sweden, pp. 1-4. Mishnaevsky Jr, L., 2012. Micromechanical analysis of nanocomposites using 3D voxel based material model. Composites Science and Technology 72(10), 1167-1177. Petrova, T., Kirilova, E., Becker, W., Ivanova, J., 2022. Two-dimensional Stress and Strain Analysis for Graphene-polymer Nanocomposite under Axial Load. Journal of Applied and Computational Mechanics 8(3), 1065-1075. Saber‐Samandari, S , Afaghi‐Khatibi, A , 2007. Evaluation of elastic modulus of polymer matrix nanocomposites. Polymer composites 28(3), 405-411. Zare, Y., Rhee, K. Y., 2020. Modeling of interphase strength between polymer host and clay nanoparticles in nanocomposites by clay possessions and interfacial/interphase terms, Applied Clay Science 192, 105644. Zhu, L., Narh, K.A., 2004. Numerical Simulation of the Tensile Modulus of N anoclay‐filled Polymer Composites. Journal of Polymer Science Part B: Polymer Physics 42(12), 2391-2406.