Comparison of mechanical properties of wheat and rice straw influenced by loading rates

  • Farman Ali Chandio
  • Ji Changying
  • Ahmed Ali Tagar
  • Irshad Ali Mari
  • T Guangzhao
  • Do Minh Cuong

Abstract

This study investigates the comparison of mechanical properties of wheat and rice straw such as shear strength, specific shearing energy and cutting forces. The experiments were conducted at three loading rate of 15, 20 and 25 mm min-1 and three internode positions 70 (N1), 130 (N2) and 190 (N3) mm down from the ear. Results show that by increasing the loading rate, strength of wheat and rice straw changed from 8.12 to 22.94 and 6.06 to 14.33 MPa and specific shear energy was varied from 12.10 to 18.64 and 10.40 to 16.17 mJ mm-2, respectively. Moreover, the values of cutting forces of wheat and rice straw were within the ranges 13.23 to 19.50 and 9.40 to 16.70 N. Whereas the shear strength, specific shearing energy and cutting force were higher at higher loading rate at the third internode of both straw internode positions. The shear strength, specific shearing energy and cutting force of rice straw were significantly higher (p<0.05) than that of wheat straw. With respect to the findings of the present research study, it is concluded that with decreasing loading rate of cutting blade toward the first internode, more energy can be saved by harvesting and threshing machines.

Keywords: Cutting force, rice straw, shear strength, specific shearing energy, wheat straw

African Journal of Biotechnology Vol. 12(10), pp. 1068-1077

Author Biographies

Farman Ali Chandio
Department of Agricultural Mechanization, College of Engineering, Nanjing Agricultural University, Post Code 210031, Nanjing, Peoples Republic of China; Department of Farm Power and Machinery, Faculty of Agricultural Engineering, Sindh Agriculture University, Tandojam, Pakistan
Ji Changying
Department of Agricultural Mechanization, College of Engineering, Nanjing Agricultural University, Post Code 210031, Nanjing, Peoples Republic of China
Ahmed Ali Tagar
Department of Agricultural Mechanization, College of Engineering, Nanjing Agricultural University, Post Code 210031, Nanjing, Peoples Republic of China
Irshad Ali Mari
Department of Agricultural Mechanization, College of Engineering, Nanjing Agricultural University, Post Code 210031, Nanjing, Peoples Republic of China
T Guangzhao
Department of Agricultural Mechanization, College of Engineering, Nanjing Agricultural University, Post Code 210031, Nanjing, Peoples Republic of China
Do Minh Cuong
Department of Agricultural Mechanization, College of Engineering, Nanjing Agricultural University, Post Code 210031, Nanjing, Peoples Republic of China
Published
2016-01-13
Section
Articles

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eISSN: 1684-5315