A finite element model to investigate the effect of ulnar variance on distal radioulnar joint mechanics

2016 ◽  
Vol 33 (2) ◽  
pp. e02790 ◽  
Author(s):  
Desney Greybe ◽  
Michael R. Boland ◽  
Tim Wu ◽  
Kumar Mithraratne
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Distal Radioulnar Joint ◽  
Ulnar Variance ◽  
Joint Mechanics ◽  
Radioulnar Joint

Effect of wrist-wearing distal radioulnar joint stabilizer on distal radioulnar joint instability using a forearm finite element model

2019 ◽  
Vol 33 (5) ◽  
pp. 2503-2508
Author(s):  
Batbayar Khuyagbaatar ◽  
Sang-Jin Lee ◽  
Maro Cheon ◽  
Temuujin Batbayar ◽  
Danaa Ganbat ◽  
...  
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Joint Instability ◽  
Element Model ◽  
Distal Radioulnar Joint ◽  
Radioulnar Joint

CONSTRUCTION AND VALIDATION OF A THREE-DIMENSIONAL FINITE ELEMENT MODEL OF THE DISTAL RADIOULNAR JOINT

2016 ◽  
Vol 16 (02) ◽  
pp. 1650010
Author(s):  
JIANWEI SUN ◽  
BINGSHAN YAN ◽  
WENZHONG NIE ◽  
ZHONGZHENG ZHI ◽  
KEKE GUI ◽  
...  
Keyword(s):  
Finite Element ◽  
Three Dimensional ◽  
Element Model ◽  
Distal Radioulnar Joint ◽  
3D Fem ◽  
Compression Load ◽  
Radioulnar Joint ◽  
Bending Load ◽  
Simulation Results ◽  
Load Conditions

Objectives: The study was to establish a precise three-dimensional (3D) finite element model (FEM) of the distal radioulnar joint (DRUJ) and then to validate its accuracy for the application to the research on clinical biomechanics. Materials and methods: The right forearm DRUJ of a volunteer (male, 28 years old, 62 kilograms) was scanned by computed tomography (CT) and magnetic resonance imaging (MRI). The resulting sectional images were input into MIMICS10.1 and ANSYS10.0 to generate 3D FEM of the DRUJ. With this FEM, the bending load, axial compression load and the torsion load conditions were simulated, and the vonmises stress distribution of the DRUJ was detected. The simulation results were compared with the biomechanics experiment results which were reported by the literatures. Results: The constructed FEM consisted of 333,805 elements and 508,384 nodes. Together, the simulation results with this FEM were in consistent with those of the reported experiments in bending load, axial compression load and torsion load conditions. Discussion: The 3D FEM of the DRUJ can reflect the real geometric structure of the DRUJ objectively and the simulation with this FEM can predict the results of the biomechanics experiments successfully.

In Vivo Contact Mechanics of the Distal Radioulnar Joint of the Normal Wrist Compared to Scapholunate Injury and Surgical Repair

2011 ◽  
Author(s):  
Mathew S. Varre ◽  
Sang-Pil Lee ◽  
Terence E. McIff ◽  
E. Bruce Toby ◽  
Kenneth J. Fischer
Keyword(s):  
Contact Mechanics ◽  
Distal Radioulnar Joint ◽  
The Body ◽  
Ulnar Variance ◽  
Joint Mechanics ◽  
Force Transmission ◽  
Scapholunate Dissociation ◽  
Secondary Osteoarthritis ◽  
Radioulnar Joint

The distal radioulnar joint (DRUJ) is a joint of the wrist which allows forearm rotation and force transmission in the upper limb while preserving stability independent of flexion and extension of the forearm and wrist. The DRUJ is a frequently injured joint in the body. Conditions affecting the joint could be positive ulnar variance (Ulnar Impaction Syndrome) or negative ulnar variance (ulnar impingement), which may be congenital or may result from a poorly reduced distal radius fracture or both bone forearm fracture. The DRUJ is also adversely affected by other injuries near the joint. In fact, a significant correlation has been found between negative ulnar variance and scapholunate dissociation [1, 2, 3]. While this could be a predisposing factor, the associate also leads to the question of whether or not scapholunate dissociation may cause changes in the radioulnar joint mechanics. Altered joint mechanics are highly associated with onset of secondary osteoarthritis. An understanding of in vivo distal radioulnar joint contact mechanics in the normal and pathological wrist could help physicians make better clinical recommendations and improve treatment for the primary injury and avoid DRUJ pathology. Successful treatment may possibly reduce risk of or prevent the onset of osteoarthritis.

Finite Element Simulation of Tire-Rim Interface

1989 ◽  
Vol 17 (4) ◽  
pp. 305-325 ◽  
Author(s):  
N. T. Tseng ◽  
R. G. Pelle ◽  
J. P. Chang
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Finite Element Simulation ◽  
Contact Pressure ◽  
Element Model ◽  
Experimental Measurements ◽  
Inflation Pressure ◽  
Interference Fit ◽  
Element Simulation ◽  
Rubber Composite

Abstract A finite element model was developed to simulate the tire-rim interface. Elastomers were modeled by nonlinear incompressible elements, whereas plies were simulated by cord-rubber composite elements. Gap elements were used to simulate the opening between tire and rim at zero inflation pressure. This opening closed when the inflation pressure was increased gradually. The predicted distribution of contact pressure at the tire-rim interface agreed very well with the available experimental measurements. Several variations of the tire-rim interference fit were analyzed.

Torsional Analysis of a Steel Cord-Rubber Tire Belt Structure

1996 ◽  
Vol 24 (4) ◽  
pp. 339-348 ◽  
Author(s):  
R. M. V. Pidaparti
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Composite Structures ◽  
Three Dimensional ◽  
Element Model ◽  
Torsional Stiffness ◽  
Element Analysis ◽  
Rubber Belt ◽  
Steel Cord ◽  
Torsional Analysis

Abstract A three-dimensional (3D) beam finite element model was developed to investigate the torsional stiffness of a twisted steel-reinforced cord-rubber belt structure. The present 3D beam element takes into account the coupled extension, bending, and twisting deformations characteristic of the complex behavior of cord-rubber composite structures. The extension-twisting coupling due to the twisted nature of the cords was also considered in the finite element model. The results of torsional stiffness obtained from the finite element analysis for twisted cords and the two-ply steel cord-rubber belt structure are compared to the experimental data and other alternate solutions available in the literature. The effects of cord orientation, anisotropy, and rubber core surrounding the twisted cords on the torsional stiffness properties are presented and discussed.

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