PSI - Issue 66

Antonio R Quiñonero-Moya et al. / Procedia Structural Integrity 66 (2024) 175–180 A. R. Quiñonero-Moya et al. / Structural Integrity Procedia 00 (2025) 000–000

179

5

Fig. 4 shows a comparison between the numerical and experimental crack paths. A good agreement can be observed for the two cases.

Fig. 4. Numerical simulation (left) and experimental test (right) of the crack path trajectory.

4. Conclusions Cortical bone microcracking simulation has been carried out using both CZM and PF model. The results of the numerical simulations have been validated with experimental tests of cortical bone-notched samples. The predicted crack path correlates with the experimental result. In both cases, the crack started its propagation within a cement line near the artificially generated notch and then propagated through the interstitial tissue between the different cement lines. The failure of the osteons was not modeled because it was not observed in the experimental tests. The models were able to capture the maximum load found during the experimental tests. However, a brittle failure was captured which did not match the damage development found during testing. Further research is being done in order to obtain a better characterization of the interstitial tissue using the PF model. Acknowledgements The authors gratefully acknowledge the funding support received from the Generalitat Valenciana and European Social Fund CIAPOS/2021/271 and Vice-Rectorate for Research of Universitat Politècnica de València with the project “Primeros Proyectos de Investigación” (PAID-06-23). The authors also thank the financial support of the Spanish Ministerio de Ciencia e Innovación MCIN/AEI/10.13039/501100011033 and “ERDF A way of making Europe” through the projects PID2020-118920RB-I00 and PID2023-151610OB-C22, the Generalitat Valenciana (Programme PROMETEO 2021/046) and grant PRE2021-097626 funded by MCIN/AEI/10.13039/501100011033 and by “ESF Investing in your future”. References Ascenzi, A., Baschieri, P., Benvenuti, A., 1990. The bending properties of single osteons. J. Biomechanics, 23, 763–771. Bensamoun, S., Fan, Z., Brice, I., Rho, J. Y., Ho, M.-C., Tho, B., 2008. Assessment of mechanical properties of human osteon lamellae exhibiting various degrees of mineralization by nanoindentation. JMR Journal of Musculoskeletal Research, 11(3), 135–143. Brown, C. U., Yeni, Y. N., Norman, T. L., 2000. Fracture toughness is dependent on bone location - A study of the femoral neck, femoral shaft, and the tibial shaft. Journal of Biomedical Materials Research, 49(3), 380–389.