PSI - Issue 77

Kumar C. Jois et al. / Procedia Structural Integrity 77 (2026) 405–412 Jois, et al./ Structural Integrity Procedia 00 (2026) 000–000

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It should be noted that void distribution—not only total volume fraction—plays a significant role in determining failure behavior. Different spatial configurations of voids may produce varying stress responses, even for the same overall porosity level. The present study thus demonstrates that incorporating realistic void morphology and distribution into numerical models is essential for reliable performance prediction and for establishing rational design margins in filament-wound composite pressure vessels. Acknowledgements The authors acknowledge the funding from the State of Nordrhein-Westfalen of the project H 2 Lorica EFO-0152B. K. Jois and N. Yoshikawa would like to thank the RWTH Theodore von Kármán fellowship under the Excellence Strategy of the Federal Government and the Länder GSO100 and GS120. References [1] Jois KC, Yoshikawa N, Gries T. Process-induced variations and their impact on structural properties of fibre reinforced pressure vessels: Lehrstuhl für Textilmaschinenbau und Institut für Textiltechnik: RWTH Aachen University; Dissertation, Rheinisch-Westfälische Technische Hochschule Aachen, 2024. [2] Mehdikhani M, Gorbatikh L, Verpoest I, Lomov SV. Voids in fiber-reinforced polymer composites: A review on their formation, characteristics, and effects on mechanical performance. Journal of Composite Materials 2019;53(12):1579–669. https://doi.org/10.1177/0021998318772152. [3] Mehdikhani M, Petrov NA, Straumit I, Melro AR, Lomov SV, Gorbatikh L. The effect of voids on matrix cracking in composite laminates as revealed by combined computations at the micro- and meso-scales. Composites Part A: Applied Science and Manufacturing 2019;117(1):180– 92. https://doi.org/10.1016/j.compositesa.2018.11.009. [4] Huang H, Talreja R. Effects of void geometry on elastic properties of unidirectional fiber reinforced composites. Composites Science and Technology 2005;65(13):1964–81. https://doi.org/10.1016/j.compscitech.2005.02.019. [5] Müller de Almeida S, Santos Nogueira Neto, Z. dos. Effect of void content on the strength of composite laminates. Composite structures 1994;28(2):139–48. https://doi.org/10.1016/0263-8223(94)90044-2. [6] Wisnom MR, Reynolds T, Gwilliam N. Reduction in interlaminar shear strength by discrete and distributed voids. Composites Science and Technology 1996;56(1):93–101. https://doi.org/10.1016/0266-3538(95)00128-X. [7] Asp LE, Brandt F. Effects of pores and voids on the interlaminar delamination toughness of a carbon/epoxy composite. In: Scott ML, editor. ICCM11 Proceedings of the 1997 International Conference on Composite Materials; 1997, p. 322–331. [8] Dong C. Effects of process-induced voids on the properties of fibre reinforced composites. Journal of Materials Science & Technology 2016;32(7):597–604. https://doi.org/10.1016/j.jmst.2016.04.011. [9] Zhu H, Wu B, Li D, Zhang D, Chen Y. Influence of Voids on the Tensile Performance of Carbon/epoxy Fabric Laminates. Journal of Materials Science & Technology 2011;27(1):69–73. https://doi.org/10.1016/S1005-0302(11)60028-5. [10] Jois KC, Höwer D. Modeling and analysis of laminated composites: classical and contemporary approaches. In: Akankwasa NT, Veit D, editors. Advances in modeling and simulation in textile engineering: New concepts, methods, and applications. Oxford: Woodhead Publishing; 2021, p. 301–349.