A Numerical Simulation for the Sliding Surface Temperature of Polyoxymethylene

Abstract

An unsteady numerical simulation was carried out to evaluate the sliding surface temperature of polyoxymethylene (POM) for wear test. The numerical model consists of two-dimensional hollow circular cylindrical POM, metallic shaft, and ambient air. The effect of conductive and convective heat transfer on the sliding surface temperature was investigated. Simulation results are in a good agreement with experiments. The influence of sliding conditions on the sliding surface temperature and limiting PV value was also discussed. Moreover, ON-OFF operation was performed in order to consider actual sliding conditions.

Numerical Investigation of the Limiting Sliding Condition of Polyoxymethylene with Various Sliding Geometry

“…Figure 3 shows the relation between contact area and limiting sliding velocity. The results of our previous two-dimensional analysis [7] and that of the experiments [10] were also shown in this figure . When the contact area becomes larger than 50 mm 2 , the limiting sliding velocity increases considerably. At a large contact area, the limiting sliding velocity was slightly different from the experimental result.…”

“…A schematic diagram of a wear testing machine was shown in ref. [7] and only geometry of test section is shown in Fig. 1.…”

“…The governing equations for the calculation were shown in ref. [7]. For the boundary condition between ambient air and POM, conductive and convective (forced) heat transfer is taken into account, i.e.…”