PSI - Issue 68

Jaynandan Kumar et al. / Procedia Structural Integrity 68 (2025) 205–211 Jaynandan Kumar, Anshul Faye / Structural Integrity Procedia 00 (2024) 000–000

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κ =0 κ =0 . 226 κ =0 . 333

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Fig. 4: Variation of inplane-hydrostatic pressure with hoop stretch on the internal surface at x 1 axis

4. Conclusion

This study highlights the importance of considering the anisotropic nature of iliac arterial tissue in the analysis of void growth and cavitation. The anisotropic Gasser-Ogden-Holzapfel (GOH) model is used for the numerical simulations, which represents the mechanical behavior of arterial tissue. The e ff ect of structure parameter κ which shows the distribution of fibers in the tissue, has been analysed. The numerical simulations revealed that the anisotropic nature of the arterial tissue and distribution of the collagen significantly influences void growth and distribution of stress near the void. Voids tend to grow higher along one direction if the perfect alignment of fibers is considered and it grows equally from all directions if fully distributed ( κ = 0 . 333) is considered. Distribution parameters ( κ ) significantly a ff ect the anisotropic nature of the tissues. Future research can explore the impact of di ff erent loading conditions on void growth and cavitation. Moreover, reliable structure parameters based on histology needed to be identified for better prediction of cavitation behaviour. Di Achille, P., Celi, S., Di Puccio, F., Forte, P., 2011. Anisotropic aaa: Computational comparison between four and two fiber family material models. Journal of biomechanics 44, 2418–2426. Dix, F., Titi, M., Al-Kha ff af, H., 2005. The isolated internal iliac artery aneurysm—a review. European Journal of Vascular and Endovascular Surgery 30, 119–129. Gasser, T.C., Ogden, R.W., Holzapfel, G.A., 2006. Hyperelastic modelling of arterial layers with distributed collagen fibre orientations. Journal of the royal society interface 3, 15–35. Holzapfel, G.A., Gasser, T.C., Ogden, R.W., 2000. A new constitutive framework for arterial wall mechanics and a comparative study of material models. Journal of elasticity and the physical science of solids 61, 1–48. Holzapfel, G.A., Sommer, G., Regitnig, P., 2004. Anisotropic mechanical properties of tissue components in human atherosclerotic plaques. J. Biomech. Eng. 126, 657–665. Holzapfel, G.A., et al., 2001. Biomechanics of soft tissue. The handbook of materials behavior models 3, 1049–1063. Kobielarz, M., 2020. E ff ect of collagen fibres and elastic lamellae content on the mechanical behaviour of abdominal aortic aneurysms. Acta of Bioengineering and Biomechanics 22. Minato, N., Itoh, T., Natsuaki, M., Nakayama, Y., Yamamoto, H., 1994. Isolated iliac artery aneurysm and its management. Cardiovascular Surgery 2, 489–494. Parry, D., Kessel, D., Scott, D., 2001. Simplifying the internal iliac artery aneurysm. Annals of the Royal College of Surgeons of England 83, 302. Richardson, J.W., Greenfield, L.J., 1988. Natural history and management of iliac aneurysms. Journal of vascular surgery 8, 165–171. References