Predicting the wear coefficient and friction coefficient in dry point contact using continuum damage mechanics

Abstract

Wear coefficient and friction coefficient are two of the key parameters in the performance of any tribo-system. The main purpose of the present research is to use continuum damage mechanics to predict wear coefficient. Thus, a contact model is utilized that can be used to obtain the friction coefficient between the contacting surfaces. By applying this model to the continuum damage mechanics model, the wear coefficient between dry surfaces is predicted. One of the advantages of using this model is that the wear coefficient can be numerically predicted unlike other methods which highly rely on experimental data. In order to verify the results predicted by this model, tests were performed using pin-on-disk test rig for several ST37 samples. The results indicated that the wear coefficient increases with increasing the friction coefficient.

Experimental and numerical study of the running-in wear coefficient during dry sliding contact

“…The model consists of two parts. The first part of the model predicts the friction coefficient as a function of load, speed and surface roughness, and the second part predicts the wear coefficient using the predicted friction coefficient based on the continuum damage mechanics [22][23][24].…”

“…Following their work, Beheshti and Khonsari [22,23] extended the application of using this method for evaluating wear coefficient for dry and lubricated contact. Ghatrehsamani and Akbarzadeh [24] employed a different roughness model to be able to predict the friction coefficient in the dry contact and then used the CDM method to quantify the wear coefficient.…”

A Unified Treatment of Tribo-Components Degradation Using Thermodynamics Framework: A Review on Adhesive Wear

“…The parameters included in the analysis were the transient wear, initial surface roughness, and runningin time. The study yielded several new dimensionless groups: (i) nondimensional Ghatrehsamani et al [176] employed the continuum damage mechanics (CDM) method [177][178][179][180] to characterize the running-in wear. The CDM method relates wear coefficient and the number of cycles for the formation of a wear particle.…”

“…(34a) * = . Ghatrehsamani et al [176] employed the continuum damage mechanics (CDM) method [177][178][179][180] to characterize the running-in wear. The CDM method relates wear coefficient and the number of cycles for the formation of a wear particle.…”

“…Mortazavi and Khonsari reported a linear relationship between (a) nondimensional transient wear loss and nondimensional initial roughness; and (b) nondimensional transient wear loss and nondimensional time. Their results are presented in Figure 23a,b, respectively.Ghatrehsamani et al[176] employed the continuum damage mechanics (CDM) method[177][178][179][180] to characterize the running-in wear. The CDM method relates wear coefficient and the number of cycles for the formation of a wear particle.…”