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Influences of moisture content and compressive loading speed on the mechanical properties of maize grain orientations

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International Journal of Agricultural and Biological Engineering 2021年第5期14卷 41-49页

作者： Farman Ali Chandio Yaoming Li Zheng Ma Fiaz Ahmad Tabinda Naz Syed Sher Ali Shaikh Mazhar Hussain Tunio School of Agricultural Engineering Jiangsu UniversityZhenjiang 212000JiangsuChina Faculty of Agricultural Engineering Sindh Agriculture UniversityTandojam 70060SindhPakistan College of Engineering Nanjing Agriculture UniversityNanjing 210044China Department of Agricultural Engineering Bahauddin Zakariya UniversityMultan 60800Pakistan

Determination of the mechanical properties(rupture force,deformation,hardness,and toughness)of maize grain could be a significant concern for designing the harvester,thresher,and handling,processing,and storage ***,the present research was conducted to assess the vertical and lateral rupture force,deformation,hardness,and toughness of maize grain(Beijing Denong,Lianchuang,Suyu 20,Liyu 88 and Suyu 29)influenced by different moisture contents(11.2%,17.5%,and 21.3%)and compressive loading speeds(5,10,15,20,and 25 mm/min,respectively).Besides,the mean length,width,thickness,geometric mean diameter,equivalent diameter,arithmetic diameter,sphericity,grain volume,surface area,and aspect ratio of the selected varieties were *** results showed that the highest length,width,thickness and sphericity,grain volume,surface area,and aspect ratio were obtained at moisture of 21.3%,whereas the lowest was at 11.2%.Moreover,it was observed that as increasing the loading speed from 5 to 25 mm/min,the vertical and lateral rupture forces ***,as increasing moisture contents from 11.2%to 21.3%,the vertical and lateral rupture forces,hardness,and toughness decreased ***,the maximum correlation(R2=0.9957)between rupture force and loading speed was found for Liyu 88 at moisture of 17.5%and minimum correlation(R2=0.7002)was found for Suyu 29 at moisture of 11.2%.Moreover,the highest lateral and vertical rupture force was noticed(ploading speed of 5 mm/*** on the experimentally obtained results,it was concluded that the properties of maize grain evaluated were relevant to the design of planter,harvesters,thrashers,and processing machine.

关键词： maize grain moisture content compressive loading speeds mechanical properties orientation

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