Prediction of patellofemoral joint kinematics and contact through co-simulation of rigid body dynamics and nonlinear finite element analysis. Issue 11 (17th August 2020)

• Record Type: Journal Article
• Authors: Müller, Jacobus H.; Razu, Swithin; Erdemir, Ahmet; Guess, Trent M.
• Is Part Of: Computer methods in biomechanics and biomedical engineering. Volume 23:Issue 11(2020)
• Page Start: 718
• Page End: 733
• Publication Date: 2020-08-17
• Subjects: Co-simulation -- patellofemoral -- rigid body -- multiscale -- nonlinear finite element; Biomechanics -- Data processing -- Periodicals; Biomedical engineering -- Periodicals; Biomechanics -- Periodicals; Biomedical Engineering -- methods -- Periodicals; Computing Methodologies -- Periodicals; 612.7
• DOI: 10.1080/10255842.2020.1761960
• Languages: English
• ISSNs: 1025-5842

Abstract

Abstract: Joint-level rigid body dynamics simulations, when coupled with tissue-level finite element analyses, can simultaneously provide movement and tissue deformation metrics to understand mechanical interactions within the joint on a multi-scale level. In this study, a co-simulation workflow of a joint-level rigid body model that predicts the relative motion as a function of the non-linear cartilage response predicted by a non-linear implicit finite element solver is presented. Predictions are compared to in-vitro measurements (The Open Knee(s) project) in terms of the mean error and level-of-agreement: pressureerror = 0.46 MPa (level-of-agreement, −0.23 – 1.1 MPa); areaerror = −89 mm 2 (level-of-agreement, −280 – 98 mm 2 ) and contact forceerror = 93 N (level-of-agreement, 7.8 – 180 N). The automated co-simulation control algorithm enables multiscale coupling between joint and tissue-level models with real-time two-way communication as opposed to the traditional feed-forward approach of multi-scale models.