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Computational Approach of the Cortical Bone Mechanical Behavior Based on an Elastic Viscoplastic Damageable Constitutive Model
International Journal of Applied Mechanics ( IF 3.5 ) Pub Date : 2020-09-25 , DOI: 10.1142/s1758825120500817
Tesnim Kraiem 1 , Abdelwahed Barkaoui 2 , Tarek Merzouki 3 , Moez Chafra 4
Affiliation  

Bone mechanical behavior varies according to the mechanical loading to which it is subjected, and its response effectiveness mainly depends on its quality. Thus, measuring the indicators controlling the bone quality is required to assess its strength. Indeed, the Finite Element Method (FEM) provides a non-invasive tool to interpret bone quality. Therefore, this work coupled the FEM with a micromechanical law, aiming to provide an exhaustive description of the human bone mechanical behavior. Anisotropy, viscoplasticity and damage were introduced in the material behavior law and the damage evolution was plotted based on the applied loading. Then a sensitivity study was conducted to evaluate the effects of viscoplasticity and damage parameters on bone behavior. The obtained numerical results were in a good agreement with the previously reported experimental data and allowed to distinguish key parameters from non-significant ones. This new computational model provided a better understanding of the main parameters affecting bone behavior.

中文翻译:

基于弹性粘塑性损伤本构模型的皮质骨力学行为计算方法

骨骼力学行为根据其所承受的机械载荷而变化,其响应效果主要取决于其质量。因此,需要测量控制骨骼质量的指标来评估其强度。事实上,有限元法 (FEM) 提供了一种非侵入性工具来解释骨骼质量。因此,这项工作将 FEM 与微机械定律相结合,旨在提供对人体骨骼力学行为的详尽描述。在材料行为定律中引入了各向异性、粘塑性和损伤,并根据施加的载荷绘制了损伤演化图。然后进行敏感性研究以评估粘塑性和损伤参数对骨行为的影响。获得的数值结果与先前报道的实验数据非常一致,并且可以区分关键参数和非重要参数。这种新的计算模型提供了对影响骨骼行为的主要参数的更好理解。
更新日期:2020-09-25
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