Dynamic analysis of the aortic valve using a finite element model

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Presentation transcript:

Dynamic analysis of the aortic valve using a finite element model Ramakrishna Gnyaneshwar, BTech, Ramarathnam Krishna Kumar, PhD, Komarakshi R Balakrishnan, MBBS, MS The Annals of Thoracic Surgery Volume 73, Issue 4, Pages 1122-1129 (April 2002) DOI: 10.1016/S0003-4975(01)03588-3

Fig 1 (A) Finite element model of the aortic valve with sinuses. (B) Cut section of the finite element model showing the leaflet in open position. The Annals of Thoracic Surgery 2002 73, 1122-1129DOI: (10.1016/S0003-4975(01)03588-3)

Fig 2 Pressure boundary condition with time. a = aortic pressure; b = left ventricular pressure; c = leaflet pressure. The Annals of Thoracic Surgery 2002 73, 1122-1129DOI: (10.1016/S0003-4975(01)03588-3)

Fig 3 Positon of three locations (nodes A, B, and C) in the model. The Annals of Thoracic Surgery 2002 73, 1122-1129DOI: (10.1016/S0003-4975(01)03588-3)

Fig 4 Displacement pattern of nodes A and B with time. The Annals of Thoracic Surgery 2002 73, 1122-1129DOI: (10.1016/S0003-4975(01)03588-3)

Fig 5 Radial deformation at location C with time. The Annals of Thoracic Surgery 2002 73, 1122-1129DOI: (10.1016/S0003-4975(01)03588-3)

Fig 6 Leaflet deformation due to the geometry of the aortic system. The Annals of Thoracic Surgery 2002 73, 1122-1129DOI: (10.1016/S0003-4975(01)03588-3)

Fig 7 Deformation of the leaflet after 0.409 seconds. The Annals of Thoracic Surgery 2002 73, 1122-1129DOI: (10.1016/S0003-4975(01)03588-3)

Fig 8 Deformation of the leaflet after 0.444 seconds. The Annals of Thoracic Surgery 2002 73, 1122-1129DOI: (10.1016/S0003-4975(01)03588-3)

Fig 9 Locations in the leaflet for monitoring stress. The Annals of Thoracic Surgery 2002 73, 1122-1129DOI: (10.1016/S0003-4975(01)03588-3)

Fig 10 (A through H) von-Mises stress variation at locations A through H (shown in Fig 9), respectively. The Annals of Thoracic Surgery 2002 73, 1122-1129DOI: (10.1016/S0003-4975(01)03588-3)

Fig 11 von-Mises stress contours at (A) 0.009429 seconds, (B) 0.189 seconds, and (C) 0.444 seconds. The Annals of Thoracic Surgery 2002 73, 1122-1129DOI: (10.1016/S0003-4975(01)03588-3)