Analysis of +Gz acceleration induced stresses in the human ventricle myocardium
| dc.contributor.author | Moore, James Ernest | |
| dc.date.accessioned | 2018-07-12T19:27:44Z | |
| dc.date.available | 2018-07-12T19:27:44Z | |
| dc.date.copyright | 1994 | en_US |
| dc.date.issued | 2018-07-12 | |
| dc.degree.department | Department of Mechanical Engineering | |
| dc.degree.level | Doctor of Philosophy Ph.D. | en_US |
| dc.description.abstract | It is well known that physiological problems occur when pilots are subjected to moderate-to-high +Gz accelerations. The goal of this research is to develop a quantitative model that provides additional insight into the adverse effects of +Gz accelerations on a pilot’s cardiovascular system. The method of investigation is in contrast to previous studies, which have mainly relied on experimental techniques. This work focuses on the development of a three-dimensional finite element model to analyse +Gz induced stresses in the human left and right ventricles. The computational model is based on non-linear continuum theory, where the effects of finite deformation, irregular shape of the heart, and (nearly) incompressible behaviour of myocardium tissue are taken into account. The finite element formulation is developed using the Galerkin weighted residual method with a penalty treatment of the incompressibility condition. In this study, an exponential type strain energy function is used to model the cardiac tissue. This technique provides a new perspective for the mechanical study of +Gz acceleration on the human heart. Results presented demonstrate the ability of the finite element model to provide quantitative data on the effects of gravitational loading on the cardiovascular system. The analysis predicts gross distortion and stress data for the human heart under sustained exposure to inertia loading up to +5 Gz. | en_US |
| dc.description.scholarlevel | Graduate | en_US |
| dc.identifier.uri | http://hdl.handle.net/1828/9684 | |
| dc.language | English | eng |
| dc.language.iso | en | en_US |
| dc.rights | Available to the World Wide Web | en_US |
| dc.subject | Myocardium | en_US |
| dc.subject | Acceleration (Physiology) | en_US |
| dc.title | Analysis of +Gz acceleration induced stresses in the human ventricle myocardium | en_US |
| dc.type | Thesis | en_US |