Comparison of Pressure Distribution by Finite Element Analysis and Pressure Measurement of Post on Total Knee Prostheses

2017 ◽  
Vol 2017.29 (0) ◽  
pp. 2B14
Author(s):  
Masaya NAKANO ◽  
Chihiro KOJIMA ◽  
Rina SAKAI ◽  
Kiyoshi MABUCHI ◽  
Kazuhiro YOSHIDA ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Pressure Distribution ◽  
Pressure Measurement ◽  
Knee Prostheses ◽  
Element Analysis ◽  
Total Knee

The effect of malalignment on stresses in polyethylene component of total knee prostheses – a finite element analysis

2002 ◽  
Vol 17 (2) ◽  
pp. 140-146 ◽  
Author(s):  
Jiann-Jong Liau ◽  
Cheng-Kung Cheng ◽  
Chun-Hsiung Huang ◽  
Wai-Hee Lo
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Knee Prostheses ◽  
Element Analysis ◽  
Total Knee

Influences of Varus Tilt on the Stresses in Human Prosthetic Knee Joint

2016 ◽  
Vol 823 ◽  
pp. 143-148 ◽  
Author(s):  
Dan Calafeteanu ◽  
Daniela Tarniţă ◽  
Marius Catana ◽  
Dan Tarnita
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Knee Joint ◽  
Knee Prostheses ◽  
Element Analysis ◽  
Human Knee ◽  
Prosthetic Knee ◽  
Ansys Simulation ◽  
Human Knee Joint ◽  
Total Knee

In this paper the effects of varus tilt on contact stresses in the three components of total knee prostheses using 3D finite element analysis were investigated. Using Ansys simulation environment, six complex virtual models of human knee joint–prosthesis assembly obtained for six different varus tilts which increase from 176o to 191o, with an increment of 3o have been subjected to finite element analysis in order to obtain the stress maps and total displacements maps.

Finite Element Analysis of the Influence of Cement Viscosity on Cement Mantle in Total Knee Arthroplasty

2010 ◽  
Author(s):  
Eric Rohrs ◽  
Manish Paliwal ◽  
D. Gordon Allan
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Total Knee Arthroplasty ◽  
Knee Arthroplasty ◽  
Cement Mantle ◽  
Flow Profile ◽  
Total Stress ◽  
Element Analysis ◽  
Total Knee ◽  
Sliding Distance

Aseptic loosening of the tibial implant is one of the major reasons of failure in Total Knee Arthroplasty (TKA). The cement viscosity at the time of application to the bone influences the cement penetration and stability of the prosthesis. Four cements of different viscosities and set times were selected for analysis (Simplex-P, DePuy-2, Palacos, and Endurance). Finite element analysis was used to model cement flow and cement mantle resulting from a surgically implanted tibial plate into sawbone open cell blocks simulating tibial cancellous bone (Pacific Research, WA). Frictional stress, pressure, sliding distance, and total stress at the bone-cement-stem interface were studied at the contact interfaces, which may contribute towards construct stability. Palacos had the maximum interface pressure, sliding distance, and total stress, while DePuy-2 displayed the lowest total stress and sliding distance at interface. Simulated flow profile correlated well with the cemented constructs’ radiographic profiles.

Analysis of Contact Pressure Distribution on 3-Bolt Self-Energized Connector Seals

2009 ◽  
Author(s):  
Rajeev Madazhy ◽  
Sheril Mathews ◽  
Erik Howard
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Pressure Distribution ◽  
Contact Pressure ◽  
Maximum Pressure ◽  
Operating Pressure ◽  
Seal Ring ◽  
Contact Pressure Distribution ◽  
Element Analysis ◽  
Novel Design

A novel design using 3 bolts for a self-energized seal connector is proposed for quick assembly applications. Contact pressure distribution on the surface of the seal ring during initial bolt-up and subsequent operating pressure is analyzed for 3″ and 10″ connectors using Finite Element Analysis. FEA is performed on a 3″ and 10″ ANSI RF flange assembly and contact pressure distribution on the RF gasket is compared with the tapered seal ring assemblies. Hydrostatic tests are carried out for the tapered seal and ANSI bolted connectors to evaluate maximum pressure at which leak occurs for both size assemblies.

Evaluation of Tooth Contact Stress With Tooth Flank Film Elements (Comparison of Evaluation With Measurement)

2007 ◽  
Author(s):  
Ichiro Moriwaki ◽  
Tomohito Tani ◽  
Toshiro Miyata ◽  
Akio Ueda ◽  
Masayoshi Yoshihara
Keyword(s):  
Finite Element Method ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Contact Problem ◽  
Contact Stress ◽  
Pressure Measurement ◽  
Gear Pair ◽  
Element Analysis ◽  
Tooth Flank ◽  
Film Element

A new finite element analysis for meshing gear pair has been developed with a new element called “tooth flank film element.” The new element is a phantom element put on a tooth flank without any thickness, and enables boundary conditions for a contact problem in meshing teeth to be easily dealt with. In the present paper, contact stresses between tooth flanks of mating gear pair calculated with the proposed finite element method are compared with stresses measured with pressure measurement films. As a result, the proposed method was confirmed to be useful for evaluation of contact stress.

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