Haitao Xie , Haiqiong Xie , Wei Chen , Jinghua Zeng , Xu Tao , Hao Li
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引用次数: 0
摘要
背景和目的肱骨柄的疲劳失效是肩关节置换术后的一种严重的长期失效，对患者造成伤害，并导致复杂的翻修手术。然而，有关肱骨柄疲劳测试的研究很少，相应的测试标准也尚未建立。因此，本研究旨在通过建立一种高效的数值模拟方法来研究肱骨柄的疲劳性能。结果标准测试条件包括直径 8 mm 的肱骨柄、40-21B 的肱骨头、8° 倾角和 2 mm 圆角半径。进一步研究发现，肱骨柄的疲劳寿命会随着患者体重的增加而缩短，因此患者术后应控制体重。结论已建立的自动化疲劳数值模拟平台避免了重复操作，并能高效完成大规模计算，为肱骨柄的术前选择和测试提供指导。
Numerical simulation and analysis of fatigue performance for the humeral stem
Background and objective
Fatigue failure of the humeral stem is a severe long-term failure after shoulder arthroplasty, causing harm to patients and resulting in complex revision surgeries. However, there are few studies on humeral stem fatigue testing, and corresponding testing standards have not been established. Therefore, this study aims to investigate the fatigue performance of the humeral stem by establishing an efficient numerical simulation method.
Methods
Material properties are obtained by uniaxial tensile and fatigue tests. A parameterized static analysis program was written, and an automated fatigue numerical simulation platform was established using Abaqus, Fe-safe, and Isight in combination, enabling the establishment of a numerical simulation method for the fatigue performance of the humeral stem.
Result
Standard testing conditions include an 8 mm diameter humeral stem, a 40-21B humeral head, an 8° tilt angle, and a 2 mm fillet radius. Further research found that the fatigue life of the humeral stem decreases with increasing patient weight, and patients should control their weight after surgery.
Conclusions
The established automated fatigue numerical simulation platform avoids repetitive operations and efficiently completes large-scale calculations, guiding preoperative humeral stem selection and testing.
期刊介绍：
The Journal of the Mechanical Behavior of Biomedical Materials is concerned with the mechanical deformation, damage and failure under applied forces, of biological material (at the tissue, cellular and molecular levels) and of biomaterials, i.e. those materials which are designed to mimic or replace biological materials.
The primary focus of the journal is the synthesis of materials science, biology, and medical and dental science. Reports of fundamental scientific investigations are welcome, as are articles concerned with the practical application of materials in medical devices. Both experimental and theoretical work is of interest; theoretical papers will normally include comparison of predictions with experimental data, though we recognize that this may not always be appropriate. The journal also publishes technical notes concerned with emerging experimental or theoretical techniques, letters to the editor and, by invitation, review articles and papers describing existing techniques for the benefit of an interdisciplinary readership.
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