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Digital image correlation and finite element modelling as a method to determine mechanical properties of human soft tissue in vivo

机译:数字图像相关和有限元建模作为一种方法   确定体内人体软组织的力学性质

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摘要

The mechanical properties of human soft tissue are crucial for impactbiomechanics, rehabilitation engineering and surgical simulation. Validation ofthese constitutive models using human data remains challenging and oftenrequires the use of non-invasive imaging and inverse finite element (FE)analysis. Post processing data from imaging methods such as tagged magneticresonance imaging (MRI) can be challenging. Digital Image Correlation (DIC)however is a relatively straightforward imaging method and thus the goal ofthis study was to assess the use of DIC in combination with FE modelling todetermine the bulk material properties of human soft tissue. Indentationexperiments were performed on a silicone gel soft tissue phantom. A two cameraDIC setup was then used to record the 3D surface deformation. The experimentwas then simulated using a FE model.
机译:人体软组织的机械特性对于冲击生物力学,康复工程和外科手术仿真至关重要。使用人类数据对这些本构模型进行验证仍然具有挑战性,并且常常需要使用非侵入性成像和有限元逆分析。来自诸如标记磁共振成像(MRI)之类的成像方法的后处理数据可能具有挑战性。然而,数字图像关联(DIC)是一种相对简单的成像方法,因此,本研究的目的是评估将DIC与有限元建模结合使用以确定人体软组织的整体材料特性的用途。在硅胶软组织体模上进行压痕实验。然后使用两个cameraDIC设置记录3D表面变形。然后使用有限元模型对实验进行仿真。

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