Department of Mechanical Engineering, Universidad Carlos III de Madrid, Avda. de la Universidad 30, 28911, Leganés, Madrid, Spain.
Department of Mechanical and Materials Engineering (CIIM), Universitat Politècnica de València Camino de Vera, 46022, Valencia, Spain.
Ann Biomed Eng. 2017 Oct;45(10):2395-2408. doi: 10.1007/s10439-017-1877-6. Epub 2017 Jun 20.
Bone fracture pattern prediction is still a challenge and an active field of research. The main goal of this article is to present a combined methodology (experimental and numerical) for femur fracture onset analysis. Experimental work includes the characterization of the mechanical properties and fracture testing on a bone simulant. The numerical work focuses on the development of a model whose material properties are provided by the characterization tests. The fracture location and the early stages of the crack propagation are modelled using the extended finite element method and the model is validated by fracture tests developed in the experimental work. It is shown that the accuracy of the numerical results strongly depends on a proper bone behaviour characterization.
骨裂模式预测仍然是一个挑战，也是一个活跃的研究领域。本文的主要目标是提出一种用于股骨骨折起始分析的组合方法（实验和数值）。实验工作包括对仿生骨的力学性能和断裂试验进行特征描述。数值工作则集中于开发一个模型，该模型的材料特性由特征描述试验提供。使用扩展有限元法对骨折位置和裂纹扩展的早期阶段进行建模，并通过实验工作中开发的断裂试验对模型进行验证。结果表明，数值结果的准确性强烈依赖于对骨骼行为的适当特征描述。
