PSI - Issue 68

Available online at www.sciencedirect.com Available online at www.sciencedirect.com Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 68 (2025) 205–211 Structural Integrity Procedia 00 (2024) 000–000 Structural Integrity Procedia 00 (2024) 000–000

www.elsevier.com / locate / procedia www.elsevier.com / locate / procedia

European Conference on Fracture 2024 Analysis of Cavitation in Human Iliac Arterial Tissue Jaynandan Kumar a, ∗ , Anshul Faye a a Department of Mechanical Engineering, Indian Insititute of Technology Bhilai, Durg-491002, Chhattisgarh, India European Conference on Fracture 2024 Analysis of Cavitation in Human Iliac Arterial Tissue Jaynandan Kumar a, ∗ , Anshul Faye a a Department of Mechanical Engineering, Indian Insititute of Technology Bhilai, Durg-491002, Chhattisgarh, India

Abstract Iliac Artery Aneurysm (IAA) rupture is a critical issue a ff ecting a large population worldwide. The rupture of IAA is accompanied by the disintegration of the tissue and the appearance of micro-voids in the tissue. These micro-voids gradually enlarge, progres sively weakening the structural integrity of the arterial wall until it fails, resulting in a rupture. Previous studies have considered the isotropic hyper-elastic nature of the tissue to analyse the cavitation in aneurysmatic tissue. However, it shows anisotropic behaviour. Therefore, it becomes imperative to investigate the growth of voids within the tissue while considering its anisotropic nature. In the study, micro-voids under hydrostatic tension have been analysed using numerical simulation in ABAQUS. The experimentally calibrated material parameter for Gasser-Ogden-Holzapfel (GOH) is used to capture the complex behaviour of aneurysmatic tissue. This study deals with the analysis of void growth and cavitation in anisotropic iliac arterial tissue. Abstract Iliac Artery Aneurysm (IAA) rupture is a critical issue a ff ecting a large population worldwide. The rupture of IAA is accompanied by the disintegration of the tissue and the appearance of micro-voids in the tissue. These micro-voids gradually enlarge, progres sively weakening the structural integrity of the arterial wall until it fails, resulting in a rupture. Previous studies have considered the isotropic hyper-elastic nature of the tissue to analyse the cavitation in aneurysmatic tissue. However, it shows anisotropic behaviour. Therefore, it becomes imperative to investigate the growth of voids within the tissue while considering its anisotropic nature. In the study, micro-voids under hydrostatic tension have been analysed using numerical simulation in ABAQUS. The experimentally calibrated material parameter for Gasser-Ogden-Holzapfel (GOH) is used to capture the complex behaviour of aneurysmatic tissue. This study deals with the analysis of void growth and cavitation in anisotropic iliac arterial tissue. © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ECF24 organizers © 2025 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) © 2025 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / )

Peer-review under responsibility of ECF24 organizers. Keywords: cavitation; anisotropic tissue; aneurysm; voids Peer-review under responsibility of ECF24 organizers. Keywords: cavitation; anisotropic tissue; aneurysm; voids

1. Introduction 1. Introduction

An Iliac Artery Aneurysm (IAA) is an abnormal bulge or ballooning in the wall of the iliac artery, which supplies blood to the lower limbs, pelvic organs, and abdominal wall. Based on its location, it can be classified as Common Iliac Artery Aneurysm (CIIA), Internal Iliac Artery Aneurysm (IIA) and External Iliac artery Aneurysm (EIA) (Richardson and Greenfield, 1988; Parry et al., 2001; Minato et al., 1994; Tanaka et al., 2022; Wilhelm et al., 2014). The risk of rupture increases with an increase in the size of the aneurysm, which can lead to internal bleeding and has a high mortality rate (Dix et al., 2005). The rupture of the aneurysm is accompanied by the disintegration of the tissue and the appearance of micro-voids in the tissue. These micro-voids gradually enlarge, progressively weakening the structural integrity of the arterial wall until it fails, resulting in a rupture (Volokh, 2015). Understanding the mechanics of growth of the micro-voids in the aneurysmatic tissue is crucial for predicting its rupture and improving clinical outcomes. Previous research has An Iliac Artery Aneurysm (IAA) is an abnormal bulge or ballooning in the wall of the iliac artery, which supplies blood to the lower limbs, pelvic organs, and abdominal wall. Based on its location, it can be classified as Common Iliac Artery Aneurysm (CIIA), Internal Iliac Artery Aneurysm (IIA) and External Iliac artery Aneurysm (EIA) (Richardson and Greenfield, 1988; Parry et al., 2001; Minato et al., 1994; Tanaka et al., 2022; Wilhelm et al., 2014). The risk of rupture increases with an increase in the size of the aneurysm, which can lead to internal bleeding and has a high mortality rate (Dix et al., 2005). The rupture of the aneurysm is accompanied by the disintegration of the tissue and the appearance of micro-voids in the tissue. These micro-voids gradually enlarge, progressively weakening the structural integrity of the arterial wall until it fails, resulting in a rupture (Volokh, 2015). Understanding the mechanics of growth of the micro-voids in the aneurysmatic tissue is crucial for predicting its rupture and improving clinical outcomes. Previous research has

∗ Corresponding author. Tel.: + 91-8962813770 E-mail address: jaynandank@iitbhilai.ac.in ∗ Corresponding author. Tel.: + 91-8962813770 E-mail address: jaynandank@iitbhilai.ac.in

2452-3216 © 2025 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of ECF24 organizers 10.1016/j.prostr.2025.06.043 2210-7843 © 2025 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of ECF24 organizers. 2210-7843 © 2025 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http: // creativecommons.org / licenses / by-nc-nd / 4.0 / ) Peer-review under responsibility of ECF24 organizers.