TY - GEN

T1 - Numerical calculation of local adhesive wear in machine elements under boundary lubrication considering the surface roughness

AU - Terwey, Jan Torben

AU - Berninger, S.

AU - Burghardt, G.

AU - Jacobs, G.

AU - Poll, Gerhard

N1 - Publisher Copyright: © Springer Nature Singapore Pte Ltd. 2019. Copyright: Copyright 2019 Elsevier B.V., All rights reserved.

PY - 2018/7/15

Y1 - 2018/7/15

N2 - The calculation of wear in boundary lubricated or unlubricated contacts of machine elements requires the knowledge of certain parameters describing the behaviour of the tribological system. An approach for wear calculation in dry sliding contacts is the ARCHARD equation, which is based on the ARCHARD wear coefficient, describing the probability of the formation of a single wear particle. Although a calculation routine for the ARCHARD equation can be formulated numerically, it is still necessary to determine the ARCHARD wear coefficient for each considered tribological system by experiments. The aim of this paper is to transfer the global ARCHARD equation into a numerical wear model, which allows a spatially resolved determination of wear depth for dry and boundary lubricated contacts. Considering the surface roughness, the calculation will be reduced to a single asperity contact. Each asperity can suffer a specific number of load cycles until its cross section is weakened so the asperity detaches from the surface. The numerical calculation of this critical number of load cycles follows the theory of continuum damage mechanics. The required nonlinear material properties can be evaluated by tensile and compression tests. The residual uncertainty of the calculation process is reduced to the specification of the coefficient of friction for the considered tribological system. The presented numerical model is validated with experimental tests on a FE8 test rig.

AB - The calculation of wear in boundary lubricated or unlubricated contacts of machine elements requires the knowledge of certain parameters describing the behaviour of the tribological system. An approach for wear calculation in dry sliding contacts is the ARCHARD equation, which is based on the ARCHARD wear coefficient, describing the probability of the formation of a single wear particle. Although a calculation routine for the ARCHARD equation can be formulated numerically, it is still necessary to determine the ARCHARD wear coefficient for each considered tribological system by experiments. The aim of this paper is to transfer the global ARCHARD equation into a numerical wear model, which allows a spatially resolved determination of wear depth for dry and boundary lubricated contacts. Considering the surface roughness, the calculation will be reduced to a single asperity contact. Each asperity can suffer a specific number of load cycles until its cross section is weakened so the asperity detaches from the surface. The numerical calculation of this critical number of load cycles follows the theory of continuum damage mechanics. The required nonlinear material properties can be evaluated by tensile and compression tests. The residual uncertainty of the calculation process is reduced to the specification of the coefficient of friction for the considered tribological system. The presented numerical model is validated with experimental tests on a FE8 test rig.

KW - Adhesive wear

KW - Contact mechanics

KW - Machine elements

UR - http://www.scopus.com/inward/record.url?scp=85068382618&partnerID=8YFLogxK

U2 - 10.1007/978-981-13-0411-8_71

DO - 10.1007/978-981-13-0411-8_71

M3 - Conference contribution

AN - SCOPUS:85068382618

SN - 9789811304101

T3 - Lecture Notes in Mechanical Engineering

SP - 796

EP - 807

BT - Proceedings of the 7th International Conference on Fracture Fatigue and Wear, FFW 2018

PB - Pleiades Publishing

T2 - 7th International Conference on Fracture Fatigue and Wear, FFW 2018

Y2 - 9 July 2018 through 10 July 2018

ER -