Effects of Hysteresis on the Dynamic Deformation of Artificial Polymeric Heart Valve

Shahrul Hisyam Marwan, Mitsugu Todo

Research output: Contribution to journalArticlepeer-review

Abstract

The deformation behavior of an artificial heart valve was analyzed using the explicit dynamic finite element method. Time variations of the left ventricle and the aortic pressure were considered as the mechanical boundary conditions in order to reproduce the opening and closing movements of the valve under the full cardiac cycle. The valve was assumed to be made from a medical polymer and hence, a hyperelastic Mooney–Rivlin model was assigned as the material model. A simple formula of the damage mechanics was also introduced into the theoretical material model to express the hysteresis response under the unloading state. Effects of the hysteresis on the valve deformation were characterized by the delay of response and the enlargement of displacement. Most importantly, the elastic vibration observed in the pure elastic response under the full close state was dramatically reduced by the conversion of a part of elastic energy to the dissipated energy due to hysteresis.

Original languageEnglish
Pages (from-to)511-523
Number of pages13
JournalProsthesis
Volume4
Issue number4
DOIs
Publication statusPublished - Dec 2022

All Science Journal Classification (ASJC) codes

  • Rehabilitation
  • Biomedical Engineering
  • Oral Surgery
  • Materials Science (miscellaneous)

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