scholarly journals Biomechanical Analysis of Hearing in Whales Using Nanoindentation and the Finite Element Method

2011 ◽  
Author(s):  
Andrew A. Tubelli ◽  
Aleks Zosuls ◽  
Darlene R. Ketten ◽  
David C. Mountain ◽  
Christopher A. Shera ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Biomechanical Analysis ◽  
The Finite Element Method ◽  
Element Method

scholarly journals Biomechanical Analysis Of The Intervertebral Disc Implant Using The Finite Element Method

2015 ◽  
Vol 15 (3) ◽  
pp. 57-66
Author(s):  
W. Kajzer ◽  
A. Kajzer ◽  
I. Pindycki
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Intervertebral Disc ◽  
Vertebral Column ◽  
Motor Vehicle ◽  
Biomechanical Analysis ◽  
The Finite Element Method ◽  
Starting Point ◽  
Locomotive Activity ◽  
Element Method

Abstract Dysfunctions of the vertebral column belong to a group of civilisation diseases and they affect approximately 80% of population. The underlying cause is modern (sedentary) lifestyle, low locomotive activity of people and frequent motor vehicle and sports accidents. Despite civilisation’s progress, no injury prophylactics or prevention of dysfunctions of the vertebral column have been introduced. The key element influencing function of the vertebral column is the intervertebral disc. It enables multidimensional movements and constitutes a basic connective element between the joints of the vertebral column. It also enables performing basic daily activities. Acting as a “damper”, it cushions vibrations and transmits loads between the vertebrae. One of the diseases affecting the intervertebral disc is discopathy. This is the most common degenerative disease, which can be treated by both conservative and surgical treatment. After removal of the damaged disc, it can be replaced by an adequate implant, which will assume its function. The implant will be expected to restore the vertebral column motor function, as well as to eliminate the pain resulting from compression of the spine caused by the damaged disc. This paper presents a biomechanical analysis using the finite element method for the L2-L3 vertebrae system with natural intervertebral disc, and the L2-L3 – implant of the intervertebral disc system. Two cases of the system vertebrae-implant were analysed which differed in the placement of the artificial disc in the intervertebral space. Within the conducted analysis, the state of displacement, strain and stress of reduced analysed systems and their individual elements was determined. A comparative analysis of the results and calculations was performed, also conclusions and observations were formulated, constituting a starting point for building more advanced calculation models and further analyses of such implants.

scholarly journals Computer and experimental analyses of the stress state in the cement hip joint endoprosthesis body

2014 ◽  
Vol 71 (11) ◽  
pp. 1034-1039
Author(s):  
Slobodan Tabakovic ◽  
Jovan Grujic ◽  
Milan Zeljkovic ◽  
Zoran Blagojevic ◽  
Bojan Radojevic ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Stress State ◽  
Hip Joint ◽  
Biomechanical Analysis ◽  
Critical Cross Section ◽  
The Finite Element Method ◽  
Hip Joint Endoprosthesis ◽  
Custom Made ◽  
Element Method

Background/Aim. One of the possible complications after implantation of a cement hip-joint endoprosthesis is fracture in the endoprosthesis body. Fractures arise from overload or material fatigue of which an implant is made. The purpose of this research was to define the intensity of maximum stress and the positions of a critical cross-section in the endoprosthesis body. Methods. Unilaterally changing forces which act on the hip joint during walking as well as the loads result in flexible deformations of the endoprosthesis body. Biomechanical analysis of the forces acting on the hip joint determine their direction and intensity, whereas on the basis of Gruen?s classification of the endoprosthesis body loosening the level of fixation is established. The bodies of cement hip joint endoprosthesis are made of cobalt-chromiummolybdenum (CoCrMo) alloy, suitable for vacuum casting, are submitted to the analysis. Analysis of the critical stress in the endoprosthesis body was performed on the endoprosthesis body by means of the finite element method. The experimental verification of the obtained results was carried out on the physical prototype under laboratory conditions. Results. Computer analysis, by means of the finite element method, determined the stress state by calculation of the maximum Von Mises stress and critical cross-sections for different angles of the resultant force action. The results obtained by the computer and experimental method correlate and are comparable to the results of similar analyses conducted on various endoprosthesis types. Conclusion. The analyses described in the paper make the basis for improving the process designing of hip joint endoprostheses and their customization to each individual patient (custom made).

Simulation of tuning graphene plasmonic behaviors by ferroelectric domains for self-driven infrared photodetector applications

Nanoscale ◽  
2019 ◽  
Vol 11 (43) ◽  
pp. 20868-20875 ◽  
Author(s):  
Junxiong Guo ◽  
Yu Liu ◽  
Yuan Lin ◽  
Yu Tian ◽  
Jinxing Zhang ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Interfacial Effect ◽  
Infrared Photodetector ◽  
The Finite Element Method ◽  
Ferroelectric Domains ◽  
Element Method

We propose a graphene plasmonic infrared photodetector tuned by ferroelectric domains and investigate the interfacial effect using the finite element method.

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