Contact simulation analysis of double cylindrical asperities using the finite element method

Abstract

To analyze the microcontact characteristics of the rough joint surface obtained by grinding more accurately, a frictionless contact model of double cylindrical asperities was established. The contact characteristics of double cylindrical asperities with different peak distance and different heights were analyzed using the finite element method. The relationship between contact load, contact pressure, contact area, and contact displacement were studied. And the effect of double asperities on the stress state of the cylindrical asperity contact zone was revealed. The results show that, in the elastic contact stage, the contact load, contact stress, contact pressure, and contact area decreased with an increase in the peak distance, and the corresponding values are smaller than that of single peak asperity contact. In the elastoplastic stage, because of the interaction of the double asperities, the change of the contact pressure with the contact displacement on the double asperities contact is larger than the corresponding value of the single peak asperity under the same conditions. The research can be applied into the model of anisotropic interface and provide theoretical foundations for the study on contact characteristics of grinding interface.