The effect of material model formulation in the stress analysis of abdominal aortic aneurysms.

The effect of material model formulation in the stress analysis of abdominal aortic aneurysms.
复制标题

DOI:
10.1007/s10439-009-9767-1
复制
发表时间:
2009-11
影响因子:
3.8
通讯作者:
Finol, Ender A.
Finol, Ender A.
中科院分区:
工程技术2区
文献类型:
--
作者:
Rodriguez, Jose F.;Martufi, Giampalo;Doblare, Manuel;Finol, Ender A.

文献摘要

参考文献

相似文献

腹主动脉瘤(AAA)壁应力的可靠估计需要对基于医学图像的原生几何结构进行准确的三维重建,并为动脉瘤组织材料表征建立适当的本构关系。最近对人AAA组织标本的双轴力学行为的研究表明,AAA组织表现出力学各向异性。本通信中显示的结果表明,峰值壁应力对用于应力分析的各向异性模型高度敏感。此外,目前的调查表明,结构参数(例如,胶原纤维取向)应该独立地测定,而不是通过对应力-应变测试数据的非线性拟合。以这种方式确定的纤维方向可能导致高估的峰值壁应力。
A reliable estimation of wall stress in Abdominal Aortic Aneurysms (AAAs), requires performing an accurate three-dimensional reconstruction of the medical image-based native geometry and modeling an appropriate constitutive law for the aneurysmal tissue material characterization. A recent study on the biaxial mechanical behavior of human AAA tissue specimens demonstrates that aneurysmal tissue behaves mechanically anisotropic. Results shown in this communication show that the peak wall stress is highly sensitive to the anisotropic model used for the stress analysis. In addition, the present investigation indicates that structural parameters (e.g., collagen fiber orientation) should be determined independently and not by means of non-linear fitting to stress-strain test data. Fiber orientation identified in this manner could lead to overestimated peak wall stresses.
DOI: 10.1067/mva.2003.213
发表时间: 2003-04-01
影响因子: 4.3
作者:
Fillinger, MF;Marra, SP;Kennedy, FE
通讯作者: Kennedy, FE
DOI: 10.1023/a:1010835316564
发表时间: 2000-01-01
影响因子: 2
作者:
Holzapfel, GA;Gasser, TC;Ogden, RW
通讯作者: Ogden, RW
DOI: 10.1108/02644400210450341
发表时间: 2002-01-01
影响因子: 1.6
作者:
Klinkel, S;Govindjee, S
通讯作者: Govindjee, S
DOI: 10.1114/1.1581880
发表时间: 2003-07-01
影响因子: 3.8
作者:
Di Martino, ES;Vorp, DA
通讯作者: Vorp, DA
DOI: 10.1115/1.3127256
发表时间: 2009-06-01
影响因子: 1.7
作者:
Martufi, Giampaolo;Di Martino, Elena S.;Finol, Ender A.
通讯作者: Finol, Ender A.