Title :
An integrated method to determine the stress-strain relationship of beating heart
Author :
Zhao, Fuzhang ; Chen, Jim S J ; Blagg, Andrew G. ; Berretta, Remus, Jr. ; Margulies, Kenneth B.
Author_Institution :
Dept. of Mech. Eng., Temple Univ., PA, USA
Abstract :
An integrated computational-experimental method was developed to characterize nonlinear elastic stress-strain behavior of the beating heart. This method combines finite element (FE) simulation with the experimental end-diastolic pressure-balloon volume relationship to characterize the deformation resistance. In the FE simulations, the hyperelastic Ogden strain energy potential was used and geometric nonlinearity was also considered. The elastic moduli for the ex-vivo rat heart obtained through the study vary from 0.003 to 0.577 MPa.
Keywords :
biomechanics; cardiology; elastic moduli; finite element analysis; physiological models; stress-strain relations; beating heart; deformation resistance; elastic moduli; end-diastolic pressure-balloon volume relationship; ex-vivo rat heart; finite element simulation; geometric nonlinearity; hyperelastic Ogden strain energy potential; integrated computational-experimental method; nonlinear elastic stress-strain behavior; stress-strain relationship; Biological materials; Capacitive sensors; Finite element methods; Heart; In vivo; Myocardium; Potential energy; Strain measurement; Stress; Testing;
Conference_Titel :
Bioengineering Conference, 2003 IEEE 29th Annual, Proceedings of
Print_ISBN :
0-7803-7767-2
DOI :
10.1109/NEBC.2003.1216100
