Ruggiero Leonardo, Sol Hugo, Sahli Hichem, Adriaenssens Sigrid, Adriaenssens Nele
Mechanics of Materials and Constructions (MeMC), Vrije Univeristeit Brussel, Brussels - Belgium and Electronics and Informatics (ETRO), Vrije Universiteit Brussel, Brussels - Belgium.
J Appl Biomater Funct Mater. 2014 Jun 12;12(1):27-34. doi: 10.5301/JABFM.2012.9337.
Finite element analysis has been used extensively in the study of biomechanical modeling of the breast. However, issues regarding the complexity of material models and the influences of geometric boundary conditions on the accuracy of a breast Finite Element (FE) model are still under debate. This work demonstrates the importance of material modeling in FE models of the breast.
A simple hemispherical geometry is used to model the shape of a human breast. Different material models are being investigated to accurately model changes in terms of displacement, stress, and reaction forces distribution.
The results obtained using nonlinear material models are compared with those obtained employing their linear approximation. Results have shown that differences, in terms of displacement, ranging between 20% and more than 80%, may occur and that large differences are present in terms of maximum principal stresses when the displacement is correctly approximated.
This study clearly shows that, in a FE model, simulating large deformations material modeling strongly influences the accuracy of the solution.
有限元分析已广泛应用于乳房生物力学建模研究。然而，关于材料模型的复杂性以及几何边界条件对乳房有限元（FE）模型准确性的影响等问题仍存在争议。本研究旨在证明材料建模在乳房有限元模型中的重要性。
采用简单的半球形几何形状来模拟人类乳房的形状。研究不同的材料模型，以准确模拟位移、应力和反作用力分布的变化。
将使用非线性材料模型获得的结果与采用线性近似模型获得的结果进行比较。结果表明，位移方面的差异可能在20%至80%以上，并且在位移正确近似时，最大主应力方面存在较大差异。
本研究清楚地表明，在有限元模型中，模拟大变形时材料建模对解的准确性有很大影响。
