Two methods of constructing the residual stress on vessel and its application
- VernacularTitle:血管残余应力的两种求解方法及其应用
- Author:
Quan-chao GAO
1
,
2
;
Kun SHANG
1
,
2
;
Xiao-bo GONG
1
,
2
;
Zong-lai JIANG
1
,
2
Author Information
1. Department of Engineering Mechanics
2. Institute of Mechanobiology and Medical Engineering, Shanghai Jiaotong University
- Publication Type:Journal Article
- Keywords:
Blood vessel;
Residual stress;
Finite element analysis;
Semi-inverse method
- From:
Journal of Medical Biomechanics
2013;28(1):E015-E019
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study distributions of the residual stresses on blood vessel, and to provide the biomechanical basis for the finite element research on stress changes in blood vessel. Methods The semi-inverse method was used for getting distributions of residual stresses on blood vessel and the result was compared with that from Commercial Software ABAQUS. On that basis, the interaction between the vessel and implanted stent was simulated to get the influence of residual stress on blood vessel. Results Distributions of three normal stresses on blood vessel obtained from the two methods were almost consistent. It is the residual stress that led to the change of vessel stress distributions, and the position of maximal stress was transformed from the inside to the outside of the vessel. Conclusions Assuming that the vessel has homogeneity and isotropic, both the semi-inverse method and the finite element method would get the similar residual stress distributions; significant differences existed between the stress states of vessel with or without considering residual stress. The stress at the inside of vessel was reduced obviously. Consideration of residual stress will be helpful for understanding the real stress state of vessel after stent deployment and providing references for the optimization design of stent.
