Finite element submodeling technique to analyze the contact pressure and wear of hard bearing couples in hip prosthesis

Shankar, S.; Nithyaprakash, R.; Santhosh, B; Uddin, Md. Sharif; Pramanik, Alokesh

doi:10.1080/10255842.2020.1734794

Cited by 28 publications

(12 citation statements)

References 19 publications

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“…However, most of previous studies about contact mechanics of legs using the FE model were based on a standing position [28][29][30][31], which could simplify the analysis and could not objectively re ect dynamic stress distribution.…”

Section: Discussionmentioning

confidence: 99%

Changes in hip Joint Contact Stress During a Gait Cycle based on the Individualized Modeling Framework of"Gait-Musculoskeletal System-Finite Element"

Xiong

Yang

Lin

et al. 2021

Preprint

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Objective: To construct a comprehensive simulation framework of "gait-musculoskeletal system(MS)-finite element(FE)" for analysis of hip joint dynamics characteristics and the changes in the contact stress in the hip throughout a gait cycle.Methods:Two healthy volunteers (male and female) were recruited. The 3D gait trajectories during normal walking and the CT images including the hip and femur of the volunteers were obtained. CT Imaging data in the DICOM were extracted for subjected 3D hip joint reconstruction. The reconstructed 3D model files were used to realize the subject-specific registration of the pelvis and thigh segment of general musculoskeletal model. The captured marker trajectory data were used to drive subject-specific musculoskeletal model to complete inverse dynamic analysis. Results of inverse dynamic analysis were exported and appliedas boundary and load settings of the hip joint finite element in ABAQUS. Finally, the finite element analysis(FEA) was performed to analyze contact stress of hip joint during a gait cycle of left foot.Results: In the inverse dynamic analysis, the dynamic changes of the main hip-femoral muscle force with respect to each phase of a single gait cycle were plotted. The hip joint reaction force reached a maximum value of 2.9%BW（Body weight）and appeared at the end of the terminal stance phase. Twin peaks appeared at the initial contact phase and the end of the terminal stance phase respectively. FEA showed the temporal changes in contact stress in the acetabulum. In the visual stress cloud chart, the acetabular contact stress was mainly distributed in the dome of the acetabulum and in the anterolateral area at the top of the femoral head during a single gait cycle. The acetabular contact area was 293.8-998.4 mm2 and the maximum contact area appear at the mid-stance phase or the loading response phase of gait. The maximum contact stress of the acetabulum reached 6.91 Mpa (Model 1) / 6.92 Mpa(Model 2) at the terminal stance phase. Conclusions:The "Gait-MS-FE" technology is integrated to construct a comprehensive simulation framework. Based on human gait trajectories and their CT images, individualized simulation modeling can be achieved. Subject-specific gait in combination with an inverse dynamic analysis of the MS provides pre-processing parameters for FE simulation for more accurate biomechanical analysis of hip joint.

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Section: Discussionmentioning

confidence: 99%

Changes in hip Joint Contact Stress During a Gait Cycle based on the Individualized Modeling Framework of"Gait-Musculoskeletal System-Finite Element"

Xiong

Yang

Lin

et al. 2021

Preprint

View full text Add to dashboard Cite

show abstract

“…Although the wear submodeling procedure proved to be an efficient solution to the high computational cost problem, as also confirmed by Shankar et al, 9,10 the main limitation of the previous study was that the discussion was restricted to a SPC case. The extension of the technique to a more general three-dimensional and multipoint contact (MPC) case is obviously of great importance.…”

Section: Introductionmentioning

confidence: 87%

Submodeling in wear predictive finite element models with multipoint contacts

Curreli

Viceconti

Puccio

2021

Numerical Meth Engineering

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The application of the submodeling technique to finite element (FE) wear analyses has been recently proposed as an efficient solution to reduce the computational cost of the simulations and provide accurate numerical results.However, the method was validated only on single point contact cases. The present study proposes a generalization of the wear submodeling procedure that can be used to speed up FE wear simulations with multipoint contacts. The modified global-local procedure is applied and evaluated on a double contact pin on plate wear test using three-dimensional models developed in Ansys® mechanical APDL. Three different model geometries with different curvature radii at the contact regions were considered in order to replicate possible critical scenarios. Results suggest that an additional wear simulation step where the global model is used to simulate the first wear cycles is needed to correctly transfer the boundary conditions to the local models. The new proposed strategy demonstrates the possibility to extend the method to more general FE wear simulations by significantly reducing their computational cost.

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“…Different approaches can be adopted to develop wear models: rarely pure analytical methods [5,7,8], whilst more commonly Finite Element (FE) analyses [2,6,[9][10][11][12]. Each method has pros and cons: analytical models allow fast simulations typically for the running-in phase of the wear process [7,8], whilst FE models can be used for long-term wear predictions to the detriment of high computational costs [13,14]. Independently from the used method, wear models are typically based on the implementation of a wear law that relates the wear volume to contact conditions, i.e.…”

Section: Introductionmentioning

confidence: 99%

Frictionless vs. Frictional Contact in Numerical Wear Predictions of Conformal and Non-conformal Sliding Couplings

Mattei¹,

Puccio²

2022

Tribol Lett

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The role of friction on wear evolution is manifold since it interplays with lubrication regime, nominal contact point, and contact pressure distribution. Nevertheless, in the literature many wear models simulate wear assuming frictionless contact conditions to simplify the analyses. That assumption, physically not realistic, often appears as a contradiction, permitted in numerical simulations where friction and wear can be considered independent phenomena.This study aims to validate the frictionless assumption in wear models with steady nominal contact point, such as in many common configurations, e.g. pin on plate/pin on disc. Wear was simulated according to the Archard wear law for both non-conformal and conformal pin-on-plate contact pairs in reciprocating motion, assuming frictionless and frictional contact conditions, varying the coefficient of friction f in the range 0–0.4. Finite Element wear models were developed in Ansys® both with implicit and explicit kinematics. Results demonstrate that the effect of friction on contact pressure distribution and worn profiles and on their evolution is negligible (differences lower than 0.05%). Thus, wear can be predicted using models in frictionless conditions which allow to extremely reduce the computational costs that represent a limit of FE wear simulations. Additionally, a procedure with implicit kinematics was compared to the explicit one resulting valid and computationally convenient, especially in case of non-conformal contact.

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Finite element submodeling technique to analyze the contact pressure and wear of hard bearing couples in hip prosthesis

Cited by 28 publications

References 19 publications

Changes in hip Joint Contact Stress During a Gait Cycle based on the Individualized Modeling Framework of"Gait-Musculoskeletal System-Finite Element"

Changes in hip Joint Contact Stress During a Gait Cycle based on the Individualized Modeling Framework of"Gait-Musculoskeletal System-Finite Element"

Submodeling in wear predictive finite element models with multipoint contacts

Frictionless vs. Frictional Contact in Numerical Wear Predictions of Conformal and Non-conformal Sliding Couplings

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