scholarly journals Elastomeric bearing sizing analysis Part 2: Flat and cylindrical bearings

2018 ◽  
Vol 152-153 ◽  
pp. 140-150 ◽  
Author(s):  
R.A. Schapery
Keyword(s):  
Elastomeric Bearing

Modeling and Identification of Elastomeric Bearing Characteristics for Large-Scale Simulations

1998 ◽  
Vol 120 (1) ◽  
pp. 63-73 ◽  
Author(s):  
K. N. Morman ◽  
E. Nikolaidis ◽  
J. Rakowska ◽  
S. Seth
Keyword(s):  
Large Scale ◽  
Dynamic Stiffness ◽  
Testing Procedure ◽  
Nonlinear Dependence ◽  
Model Parameters ◽  
Elastomeric Bearing ◽  
Nonlinear Viscoelastic ◽  
Component Test ◽  
Differential Type ◽  
Stiffness And Damping

A constitutive equation of the differential type is introduced to model the nonlinear viscoelastic response behavior of elastomeric bearings in large-scale system simulations for vibration assessment and component loads prediction. The model accounts for the nonlinear dependence of dynamic stiffness and damping on vibration amplitude commonly observed in the behavior of bearings made of particle-reinforced elastomers. A testing procedure for the identification of the model parameters from bearing component test data is described. The experimental and analytical results for predicting the behavior of four (4) different car bushings are presented. In an example application, the model is incorporated in an ADAMS simulation to study the dynamic behavior of a car rear suspension.

scholarly journals Lateral stiffness and buckling strength of multilayer elastomeric bearing.

1993 ◽  
Vol 66 (1) ◽  
pp. 38-51
Author(s):  
Takashi AKASAKA ◽  
Shigeru KAGAMI ◽  
Atsushi HASEGAWA ◽  
Manabu HANJYO
Keyword(s):  
Lateral Stiffness ◽  
Buckling Strength ◽  
Elastomeric Bearing

Assessment of the vertical stiffness of elastomeric bearing due to displacement and rotation

2020 ◽  
Vol 119 ◽  
pp. 103306
Author(s):  
Ehsan Kazeminezhad ◽  
Mohammad Taghi Kazemi ◽  
S.Mohammad Mirhosseini
Keyword(s):  
Vertical Stiffness ◽  
Elastomeric Bearing

Evaluation of the frictional properties of an elastomer with enhanced lipid-adsorbing ability

1997 ◽  
Vol 211 (5) ◽  
pp. 359-368 ◽  
Author(s):  
P F Williams ◽  
Y Iwasaki ◽  
K Ishihara ◽  
G L Powell ◽  
J A Gilbert ◽  
...  
Keyword(s):  
Tribological Properties ◽  
Particle Production ◽  
Film Formation ◽  
Wear Particle ◽  
Load Bearing ◽  
Dipalmitoyl Phosphatidylcholine ◽  
Elastomeric Bearing ◽  
Boundary Lubricant ◽  
Major Factors ◽  
Static Coefficient Of Friction

Wear particle production in load-bearing orthopaedic implants is one of the major factors currently limiting the service life of the implant. Most of the research carried out to date in attempting to solve this problem has used the approach of finding more wear-resistant biocompatible material pairs. In contrast, other researchers have attempted to reduce wear by encouraging elastohydrodynamic film formation through the use of elastomeric bearing surfaces. Unfortunately, these elastomeric bearing surfaces have poor tribological properties when a fluid film is not present. Boundary lubrication of an elastomeric orthopaedic bearing may alleviate some of these difficulties. The purpose of this research was to fabricate and characterize an elastomeric material that had a surface capable of specifically adsorbing a naturally occurring boundary lubricant. Dipalmitoyl phosphatidylcholine (DPPC) has been previously shown to be able to act as a boundary lubricant at stresses that occur in human load-bearing joints such as the hip and knee; therefore, DPPC was chosen for use in this study. It was expected that in an aqueous liposome suspension the static coefficient of friction μs of such a material would be lower, and increase less quickly over time, than a similar material without an ability to adsorb specifically DPPC when articulated against a polished chrome steel ball bearing. The lipid-adsorbing elastomer did not possess the desired tribological properties. This result was attributed to the polymer adsorbing the DPPC in the liposome phase and not in the bilayer phase, and interaction among the polymeric surface, DPPC and water. This approach to lubricating orthopaedic bearings was shown to have some merit, but a great deal of work needs to be done before such an approach can be used on a clinically available material.

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