Simulation on the Wear Behavior of the Wear-Resistant Surfaces Using Discrete Element Method

Abstract

On the basis of the discrete element method (DEM), the non-linear mechanical model of the wear-resistant body surfaces was established. The step, convexity, and scale arranged structures of the wear-resistant surfaces and their abrasive wear systems were established with the software PFC2D®. Through the qualitative analysis on the morphology, the contact-bond fields and the contact-force chains, the minor injuries and the breakaway of the debris of the wear behaviors are observed. Besides, the dynamic force acted on the wear-resistant structures was studied through the quantitative analysis. Numeral simulation shows that the step structure was worn dramatically in its tip part, the convexity structure distributes the stress prominently and the scale structure shows the best wear-resistant function. The wear loss of the front monomers of the step, convexity, and scale structures are 2.43%, 2.02%, and 1.12% respectively after being worn for eight minutes in the simulation, which are in accordance with the experimental results. The numerical simulation on the abrasive wear behavior of the biological wear-resistant structures by DEM helps to reveal the wearable mechanism of the wear-resistant surfaces. Moreover, it provides a new method for studying the bionic wear-resistant surfaces and structures.

Characterization of Microscopic Damage Evolution of Functional Groove in Cageless Bearings

“…Through qualitative analysis of abrasive grain morphology, contact bond field, and contact force chain, light injuries and shedding of abrasive wear behavior were observed. This study provides a new approach to abrasive wear on non-smooth surfaces [29,30].…”

Characterization of Bond Fracture in Discrete Groove Wear of Cageless Ball Bearings

“…Zhao et al established discrete element models based on the discrete element method for ceramic and workpiece materials to simulate the evolution of tool crack generation, expansion and material spalling during machining of 45 steel with ceramic tools and to analyze the effect of different parameters on tool wear [ 16 ]. Zhang et al used discrete element software to establish the step, convexity and scale arrangement structures of wear surfaces and their abrasive wear systems to observe light injuries and shedding of abrasive wear behavior through qualitative analysis of abrasive grain morphology, contact bond fields and contact force chains [ 17 ]. Based on the bonding model, Horabik et al employed the discrete element method to simulate the fragmentation process of starch agglomerates and to analyze the microscopic mechanism of agglomerate compression and bond breakage strength [ 18 ].…”

Simulation of Pressing Effect of Press Wheel with Different Rims by Discrete Element Method

“…The DEM simplifies discrete particles to form a certain shape and mass of particle set. The numerical model is built based on the characteristics of discrete particles and to give the discrete particles themselves, between particles and between particles and the outer boundary a contact mechanics model and the model parameters used to consider the different mechanical and physical characteristic of them [4,5,6]. In the field of mechanics, the DEM is mainly used in rock mechanics, mechanics of granular media and soil mechanics and in engineering, it is mainly used in agricultural engineering, food engineering and chemical engineering.…”