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Convergent evolution inspired serrated structure for improving efficiency of soil imprinting and its mechanism investigation

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International Journal of agricultural and Biological Engineering 2019年第4期12卷 16-26页

作者： Zhihong Zhang Ying Li Jin Tong Stephen Carr College of Agriculture and Food Kunming University of Science and TechnologyKunming 650500China United States Department of Agriculture Agricultural Research Service1680 Madison Ave.WoosterOhio 44691USA The Key Laboratory of bionic Engineering Jilin UniversityChangchun 130025China International Soil and Water Renewables LLCSalemIndiana 47167USA

Remarkable geometrical similarities are found in digging claws of soil burrowing animals,in spite of the fact that they evolved *** on convergent evolution theory,this study innovatively proposed a bionic engineering perspective that focuses on general and analogous geometrical characteristics of soil *** was observed that soil animals with powerful burrowing ability have analogous serrated structures on their digging *** soil imprinting toothed wheel as the research object,the hypothesis that special serrated structures have the potential of reducing penetrating resistance from soil and enhancing digging efficiency for soil engaging component was *** convergent evolution inspired bionic serrated structures were utilized for the design of cutting edge on toothed ***,a toothed wheel that mounted with the conventional tooth and a bionic tooth were manufactured and tested in the soil *** showed that special bionic serrated structure could reduce the required draft force for toothed wheel;meanwhile increase the depth and volume of prepared *** was found that the soil-penetrating mechanism of the bionic toothed wheel behaved as saw cutting that similar to the digging behavior of soil burrowing *** of serrated structure has the ability to maximum stress concentrations in soil,thus increased the tendency of soil material to *** results indicate that the convergent evolution inspired bionic approach is novel and advantageous for the design of new soil engaging implements for working quality optimization and forward resistance reduction.

关键词： convergent evolution bionic serrated structure soil imprinting soil-engaging component bionic agricultural machinery

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