izvorni znanstveni rad
During the landing of the helicopter, the greatest load and wear occurs on its undercarriage, which is usually hardened by heat treatment and additional application of coatings made of metal composites of increased hardness. The paper proposes a procedure for material characterization and wear analysis of the wear of helicopter skid shoe by applying the procedures prescribed by standards for testing the microstructure, hardness, and appearance of the wear and determining the rate of abrasive wear using the "dry sand/rubber wheel" method according to the ASTM G65:2016 standard. Based on the results of a laboratory test of abrasive wear of a commercially available sled liner with hard welded tracks and Archard's wear equation, a mathematical model was proposed for predicting the rate of abrasive wear under conditions of helicopter landing on sandy soil.
lining of helicopter skids; welded strip; abrasion resistance
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