Submodeling in wear predictive finite element models with multipoint contacts

Abstract

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.

Evaluation of In Vivo Biocompatibility in Preclinical Studies of a Finger Implant Medical Device Correlated with Mechanical Properties and Microstructure

“…The initial contact pressure calculated analytically based on the Archard wear theory is 37 GPa. Thus, the validation parameters of the FE model of the wear test will be the contact pressures and worn volumes. , …”

“…Thus, the validation parameters of the FE model of the wear test will be the contact pressures and worn volumes. 29,30 FE mesh generation was performed in Ansys Fluent 2022 R2 software. The 2D axisymmetric model of the wear test is fixed to the ground, and the indenter moves into the sample and along its surface according to the experimental conditions.…”

Application and Prospect of Wear Simulation Based on ABAQUS: A Review

“…Therefore, the sub-model method is suitable for wear analysis of large and complex structures. The program for the wear sub-model mainly consists of three steps [52], which are shown in Figure 5a. The first step is to determine the boundary conditions required for creating a detailed local model based on the initial rough FE global model.…”

“…Eventually, the local model, to which boundary conditions from the global model are applied, is used to conduct the wear simulation. The research of Curreli et al [52,53] on the substructure method showed that the sub-model method can greatly reduce the computational cost of FE wear simulation. In particular, in the biomedical field, complex finite element models result in high time costs [26].…”

“…The extrapolation technique is one of the most commonly used methods, with the main idea involving the assumption that the state of multiple wear cycles is the same as the state of one cycle [52]. An extrapolation factor is introduced to calculate the wear depth after several wear cycles.…”