Research Papers: Friction and Wear

On the Prediction of Transient Wear

[+] Author and Article Information
Vahid Mortazavi

Department of Mechanical
and Industrial Engineering,
Louisiana State University,
Baton Rouge, LA 70803

M. M. Khonsari

Department of Mechanical
and Industrial Engineering,
Louisiana State University,
Baton Rouge, LA 70803
e-mail: Khonsari@me.lsu.edu

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received June 29, 2015; final manuscript received February 12, 2016; published online July 14, 2016. Assoc. Editor: Sinan Muftu.

J. Tribol 138(4), 041604 (Jul 14, 2016) (8 pages) Paper No: TRIB-15-1228; doi: 10.1115/1.4032843 History: Received June 29, 2015; Revised February 12, 2016

During the running-in process, a friction pair experiences drastic evolution in many of its tribological parameters, such as surface roughness, wear rate, and coefficient of friction until steady-state is attained. In this paper, we present a model for predicting the behavior of the running-in process. Specifically, we determine a general relationship between the wear loss and surface roughness during the running-in stage and test the validity of its prediction of wear rate by comparing to available experimental results. We show, by using a dimensional analysis and applying the Buckingham Pi theorem, that there exists a linear relationship between the transient dimensionless wear, the dimensionless initial surface roughness, and dimensionless running-in time.

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Fig. 1

A schematic of plastic contact of asperities

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Fig. 2

A schematic for contact of rough surface with a rigid smooth flat surface

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Fig. 3

Wear curves for parameters described in Table 3. Scattered data from experiments done by Queener et al. [3].

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Fig. 4

Transient wear coefficient for simulations by parameters described in Table 3

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Fig. 5

Effect of initial Ra on wear loss for different combinations of load and hardness. The simulations are shown for two different values of ϕ.

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Fig. 6

Relation of nondimensional transient wear loss and nondimensional initial roughness during running-in for different H/E

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Fig. 7

Relation of nondimensional wear loss and nondimensional time during running-in for different nondimensional initial roughness values and for constant value of H/E



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