PSI - Issue 66

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2025) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 66 (2024) 175–180

8th International Conference on Crack Paths Simulation of cortical bone microcracking in three-point bending test using phase field fracture model Antonio R Quiñonero-Moya*, Diego Infante-García, Ana Vercher-Martínez, Eugenio Giner Universitat Politècnica de València, Institute of Mechanical Engineering and Biomechanics – I2MB, Department of Mechanical Engineering and Materials, Camino de Vera s/n, 46022 Valencia, Spain Abstract The mechanical characterization of bone tissue is a difficult task. In fact, fracture toughness estimation of cortical bone constituents is performed by some researchers by correlating experimental tests and finite element simulations. In this work, the numerical simulation of a three-point bending test of a cortical bone sample has been carried out using the variational Phase Field model of fracture and the cohesive zone model. The model includes the microstructural components of cortical bone: secondary osteons, interstitial bone, and the cement line. The Phase Field method was employed to model the fracture behavior of the interstitial bone and secondary osteons, providing a robust framework for capturing complex crack propagation processes. Additionally, cohesive zone models were utilized to represent the mechanical behavior of the cement line. Our simulations demonstrated a good correlation with experimental data, predicting the initiation and progression of cracks within the cortical bone structure. © 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) © 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 CP 2024 Organizers

Peer-review under responsibility of CP 2024 Organizers Keywords: Cortical bone; Cement lines; Toughness; Phase Field.

* Corresponding author. E-mail address: anqumo@upv.es

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 CP 2024 Organizers

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 CP 2024 Organizers 10.1016/j.prostr.2024.11.068