Level of Activity Changes Increases the Fatigue Life of the Porous Magnesium Scaffold, as Observed in Dynamic Immersion Tests, over Time

Risky Utama Putra, Hasan Basri (), Akbar Teguh Prakoso, Hendri Chandra, Muhammad Imam Ammarullah, Imam Akbar, Ardiyansyah Syahrom () and Tunku Kamarul
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Risky Utama Putra: Engineering Science Doctoral Study Program, Faculty of Engineering, Sriwijaya University, Indralaya 30662, South Sumatra, Indonesia
Hasan Basri: Engineering Science Doctoral Study Program, Faculty of Engineering, Sriwijaya University, Indralaya 30662, South Sumatra, Indonesia
Akbar Teguh Prakoso: Engineering Science Doctoral Study Program, Faculty of Engineering, Sriwijaya University, Indralaya 30662, South Sumatra, Indonesia
Hendri Chandra: Engineering Science Doctoral Study Program, Faculty of Engineering, Sriwijaya University, Indralaya 30662, South Sumatra, Indonesia
Muhammad Imam Ammarullah: Department of Mechanical Engineering, Faculty of Engineering, Pasundan University, Bandung 40153, West Java, Indonesia
Imam Akbar: Department of Mechanical Engineering, Faculty of Engineering, Tridinanti University, Palembang 30129, South Sumatra, Indonesia
Ardiyansyah Syahrom: Applied Mechanics and Design, School of Mechanical Engineering, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia, Skudai 81310, Johor, Malaysia
Tunku Kamarul: Department of Orthopaedic Surgery, Tissue Engineering Group, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia

Sustainability, 2023, vol. 15, issue 1, 1-13

Abstract: In the present study, the effects of human physiological activity levels on the fatigue life of a porous magnesium scaffold have been investigated. First, the dynamic immersion and biomechanical testing are carried out on a porous magnesium scaffold to simulate the physiological conditions. Then, a numerical data analysis and computer simulations predict the implant failure values. A 3D CAD bone scaffold model was used to predict the implant fatigue, based on the micro-tomographic images. This study uses a simulation of solid mechanics and fatigue, based on daily physiological activities, which include walking, running, and climbing stairs, with strains reaching 1000–3500 µm/mm. The porous magnesium scaffold with a porosity of 41% was put through immersion tests for 24, 48, and 72 h in a typical simulated body fluid. Longer immersion times resulted in increased fatigue, with cycles of failure (Nf) observed to decrease from 4.508 × 10 22 to 2.286 × 10 11 (1.9 × 10 11 fold decrease) after 72 hours of immersion with a loading rate of 1000 µm/mm. Activities played an essential role in the rate of implant fatigue, such as demonstrated by the 1.1 × 1 05 fold increase in the Nf of walking versus stair climbing at 7.603 × 10 11 versus 6.858 × 1 05 , respectively. The dynamic immersion tests could establish data on activity levels when an implant fails over time. This information could provide a basis for more robust future implant designs.

Keywords: cycles of failure; dynamic immersion; fatigue; porous magnesium scaffold (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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