| Title |
Experimental Investigation of Friction Coefficients in Rotational Friction Hinges |
| DOI |
https://doi.org/10.5659/JAIK.2025.41.10.311 |
| Keywords |
Rotational Friction Hinge; Friction Coefficient; Friction Pad; Brass; Stainless Steel |
| Abstract |
This study develops a rotational friction hinge to transfer the loads of an Energy Storage System (ESS) directly to building columns in
rooftop vertiports for Urban Air Mobility (UAM) and evaluates the friction coefficients of the applied friction pads. Brass and stainless steel
were selected as friction pad materials, and 18 specimens were fabricated with different thicknesses and diameters. Cyclic loading tests
produced load?displacement hysteresis curves, and friction coefficients were determined using both the static peak load method and the
energy-based method. Results showed that brass had friction coefficients between 0.12 and 0.15, while stainless steel ranged from 0.17 to
0.23, closely matching the energy-based method. Hardness differences between contact surfaces and the presence of a residual oil film on the
disposable shim plate influenced the measured coefficients. Using these evaluated friction coefficients, the required number of friction pads for
ESS support structures was estimated at the design level. |