Finite Element Analysis Of Large Deformation Of Articular Cartilage In Upper Ankle Joint Of Occupant In Military Vehicles During Explosion

Klekiel, Tomasz; Będziński, R.

doi:10.1515/amm-2015-0356

Cited by 23 publications

(12 citation statements)

References 25 publications

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“…These models differ mostly in their description of the cartilage. In the FEM ankle models, the contact of the bones is often described with finite elements, which are deformable [11,12,13,14]. The most common approach in the multibody models is to replace the cartilage with a revolute kinematic pair or two revolute pairs for 3D motions [15,16,17,18,19,20,21].…”

Section: Introductionmentioning

confidence: 99%

A Planar Model of an Ankle Joint with Optimized Material Parameters and Hertzian Contact Pairs

Borucka

Ciszkiewicz

2019

Materials

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The ankle is one of the most complicated joints in the human body. Its features a plethora of elements with complex behavior. Their functions could be better understood using a planar model of the joint with low parameter count and low numerical complexity. In this study, an accurate planar model of the ankle with optimized material parameters was presented. In order to obtain the model, we proposed an optimizational approach, which fine-tuned the material parameters of two-dimensional links substituting three-dimensional ligaments of the ankle. Furthermore, the cartilage in the model was replaced with Hertzian contact pairs. The model was solved in statics under moment loads up to 5 Nm. The obtained results showed that the structure exhibited angular displacements in the range of the ankle joint and that their range was higher in dorsiflexion than plantarflexion. The structure also displayed a characteristic ramp up of the angular stiffness. The results obtained from the optimized model were in accordance with the experimental results for the ankle. Therefore, the proposed method for fine-tuning the material parameters of its links could be considered viable.

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Section: Introductionmentioning

confidence: 99%

A Planar Model of an Ankle Joint with Optimized Material Parameters and Hertzian Contact Pairs

Borucka

Ciszkiewicz

2019

Materials

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“…The bones also interact through a layer of soft tissue called cartilage, which transfers mostly compressive loads. There are two major options when modeling such a complicated structure:  the finite element method (FEM), in which most of joint's structures are modeled as deformable [16][17][18][19],  the multibody method (MBS), in which the major elements of the joint are substituted with simple mechanical counterparts [4,10,[20][21][22][23][24][25][26][27].…”

Section: Modeling the Anklementioning

confidence: 99%

Arbitrary Prestrain Values for Ligaments Cause Numerical Issues in a Multibody Model of an Ankle Joint

Ciszkiewicz

2022

Symmetry

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Experimental studies report that ligaments of the ankle joint are prestrained. The prestrain is an important aspect of modern biomechanical analysis, which can be included in the models by: applying symmetrical, arbitrary prestrains to the ligaments, assuming a strain-free location for the joint or by using experimental prestrain data. The aim of the study was to comparatively analyze these approaches. In total, 4 prestraining methods were considered. In order to do so, a symmetrical model of the ankle with six nonlinear cables and two sphere–sphere contact pairs was assumed. The model was solved in statics under moment loads up to 5 Nm. The obtained results showed that the arbitrary prestrains caused an unbalanced load for the model at rest, and in turn modified its rest location in an unpredictable way. Due to the imbalance, it was impossible to enforce the assumed prestrains and thus cartilage prestrain was required to stabilize the model. The prestraining had a significant effect on the angular displacements and the load state of the model. The findings suggest that the prestrain values are patient specific and arbitrary prestrains will not be valid for most models.

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“…Boundary conditions set-up in the simulation scenarios are illustrated in Figure 3. The contact definitions between components were included as Elastic modulus (MPa) 19100 [26,27] 1000.61 [28,29] 1230 [31] Poisson's ratio ( -) 0.3 [30] 0.3 [30] 0.42 [31] Density (kg m -3 ) 1980 [30] 830 [32] 431 [30] FEA: Finite element analysis. the frictional contact (non-linear contact) between the osteochondral plug and the socket and tibiotalar articular cartilage surfaces.…”

Section: Boundary Conditions and Materials Propertiesmentioning

confidence: 99%

“…The material properties for cortical, trabecular, and articular cartilage were separately assigned under consideration of isotropic homogenous linear elastic material model assumptions (Table I). [26][27][28][29][30][31][32]…”

Section: Boundary Conditions and Materials Propertiesmentioning

confidence: 99%

Effect of cartilage thickness mismatch in osteochondral grafting from knee to talus on articular contact pressures: A finite element analysis

et al. 2021

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Objectives: The aim of this study was to investigate the effect of cartilage thickness mismatch on tibiotalar articular contact pressure in osteochondral grafting from femoral condyles to medial talar dome using a finite element analysis (FEA). Materials and methods: Flush-implanted osteochondral grafting was performed on the talar centromedial aspect of the dome using osteochondral plugs with two different cartilage thicknesses. One of the plugs had an equal cartilage thickness with the recipient talar cartilage and the second plug had a thicker cartilage representing a plug harvested from the knee. The ankle joint was loaded during a single-leg stance phase of gait. Tibiotalar contact pressure, frictional stress, equivalent stress (von Mises values), and deformation were analyzed. Results: In both osteochondral grafting simulations, tibiotalar contact pressure, frictional stress, equivalent stress (von Mises values) on both tibial and talar cartilage surfaces were restored to near-normal values. Conclusion: Cartilage thickness mismatch does not significantly change the tibiotalar contact biomechanics, when the graft is inserted flush with the talar cartilage surface.

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Finite Element Analysis Of Large Deformation Of Articular Cartilage In Upper Ankle Joint Of Occupant In Military Vehicles During Explosion

Cited by 23 publications

References 25 publications

A Planar Model of an Ankle Joint with Optimized Material Parameters and Hertzian Contact Pairs

A Planar Model of an Ankle Joint with Optimized Material Parameters and Hertzian Contact Pairs

Arbitrary Prestrain Values for Ligaments Cause Numerical Issues in a Multibody Model of an Ankle Joint

Effect of cartilage thickness mismatch in osteochondral grafting from knee to talus on articular contact pressures: A finite element analysis

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