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http://dx.doi.org/10.7843/kgs.2021.37.3.31

Evaluation of the Optimal Grouser Shape Ratio of Dozer Considering the Ground Conditions  

Baek, Sung-Ha (Korea Institute of Civil Engr. and Building Tech.)
Kwak, Tae-Young (Korea Institute of Civil Engr. and Building Tech.)
Choi, Changho (Korea Institute of Civil Engr. and Building Tech.)
Lee, Seong-Hwan (Korea Institute of Civil Engr. and Building Tech)
Publication Information
Journal of the Korean Geotechnical Society / v.37, no.3, 2021 , pp. 31-41 More about this Journal
Abstract
A dozer is a construction machinery used to move soil mass along large open tracts of land. Soil thrust generated on the soil-track interface determines the performance of the dozer; to improve the tractive performance of the dozer, the outer surface of the continuous-track is designed to protrude with grousers. In this study, we calculated soil thrust of the dozer equipped with grousers with various shape ratios, and evaluated the optimal grouser shape ratio considering ground conditions. Grouser generated additional soil thrust on the side of the continuous-track (e.g., side soil thrust) and converted the shearing surface (e.g., from soil-track interface to soil-soil interface), increasing the soil thrust of dozer by about 1.3 to 1.6 times. The effect of grouser's shape ratio on the soil thrust of dozer differed with the relative density of the ground. As the shape ratios of grouser increased, soil thrust of dozer decreased at the relative density of 40% and increased at the relative density of 80%. Based on these results, it can be concluded that the shape ratio of grouser severely affects the dozer's performance; thus, careful consideration of the optimal shape ratio of grouser is of great importance in the mechanical design, evaluation, and optimization of the undercarriage of dozers.
Keywords
Dozer; Grouser; Shape ratio; Soil-track interface; Soil thrust;
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