Reverse and Optimization for Constitutive Parameters of Adipose Tissues Based on Feasible Direction Method
10.16156/j.1004-7220.2021.05.11
- VernacularTitle:基于可行方向法的脂肪组织本构模型参数反求优化
- Author:
Shihai CUI
1
,
2
;
Hengkuan WANG
1
;
Haiyan LI
1
,
2
;
Lijuan HE
1
,
2
;
Wenle LÜ
1
,
2
Author Information
1. College of Mechanical Engineering, Tianjin University of Science and Technology
2. International Research Association on Emerging Automotive Safety Technology
- Publication Type:Journal Article
- Keywords:
adipose tissues;
mechanical properties;
method of feasible direction (MFD);
constitutive model;
parameter inversion
- From:
Journal of Medical Biomechanics
2021;36(5):E732-E737
- CountryChina
- Language:Chinese
-
Abstract:
Objective To study the constitutive model of adipose tissue at medium strain rate and its parameter inversion. Methods Based on experiments of adipose tissue mechanical properties, the compression experiment of adipose tissues was reconstructed by finite element method, and the parameters for characterizing constitutive models of adipose tissues were screened. Combined with the method of feasible direction (MFD) in optimization method, the reverse calculation for parameters of fat tissue constitutive model at medium strain rate was conducted. ResultsCompared with Ogden constitutive model, the viscoelastic constitutive model was more suitable for characterizing the mechanical response at medium strain rate (260 s-1). The parameters of the constitutive model suitable for simulation were obtained using the reverse method. Conclusions The viscoelastic constitutive model was more suitable for characterizing the mechanical response at medium strain rate. The results provide references for studying the influence of human adipose tissues on body injury in finite element simulation of vehicle collisions.
