Modeling shear resistance of alfalfa stem against semi-static loads

Authors

  • Hassan Zaki Dizaji Department of Biosystems Engineering, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran. http://orcid.org/0000-0002-8891-5031
  • Hossein Roshanghiyas 1. Department of Agricultural Machinery Engineering, Faculty of Biosystems Engineering, University of Tehran, P.O. Box 4111, Karaj 31587-77871, Iran
  • Ali Jafary 1. Department of Agricultural Machinery Engineering, Faculty of Biosystems Engineering, University of Tehran, P.O. Box 4111, Karaj 31587-77871, Iran

Abstract

Knowledge of the physical properties of alfalfa stems is essential in the design of alfalfa harvesting machines. In this research, the components of force, strength, energy, and shearing power in fresh alfalfa stem by cutting blade at four-speed levels of V1=125mm/min, V2=250mm/min, V3=375mm/min, V4=500mm/min and three ranges of diameter D1=2-2.5mm, D2 =2.5-3mm, D3=3-3.5mm has been investigated. Examining Duncan's variance analysis table shows that the changes in speed and diameter on the force, stress, energy, and shear power are significant at a 1% level. The range of force, tension, energy, and shear power is 1.72-37.57N, 0.47-4.64Mpa, 0.008-0.15j, and 0.004-0.086w, respectively. Also, to investigate the cumulative effect of cutting the stems that occurs in harvesting with a cutting comb, the components of force, energy, and shearing power have been investigated in bunches of two, three, and four hay at a speed level of 500mm/min. The range of force, energy, and shear power in the multiple of alfalfa stem are 11.16-49.06 N, 0.07-0.46j, and 0.04-0.18w, respectively.

Author Biography

Hassan Zaki Dizaji, Department of Biosystems Engineering, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran.

Dr. Hassan Zaki Dizaji is an Assistance Professor of the Biosystems Engineering Department at the Shahid Chamran University of Ahvaz (SCUA), Iran. He is teaching and researching in the area of Postharvest engineering, Agricultural mechanization, and Agricultural machines. He has received B.Sc. in agricultural machinery engineering in 2001 from Urmia University, Urmia, Iran, and M.Sc. in 2003 Ph.D. 2009 in Mechanics of agricultural machinery engineering from Tarbiat Modarres University, Tehran, Iran. In 2008, He also researched as a Ph.D. researcher for 6 months in Università Degli Studi Della Tuscia, Viterbo, Lazio, Italy.

He was Student Affairs director at SCU 2010 – 2013; Head of Biosystems engineering Department at SCUA in 2014-2016, the secretary of the 12th National Congress of Biosystems Engineering and Mechanization of Iran 5-7 February 2020, and he is Chairman of the Iranian Association of Agricultural Machinery and Mechanization Engineering (ISAMME) 2020- now. He has published about 60 research papers in National and International Journals, and 110 popular and technical articles in different proceedings, totally in the area of agricultural project control, Machine vision, and Non-destructive Ultrasonic technology in food quality control. He is also serving as a member of reviewer for various national and international journals.

Research Interest

Prof. Hassan Zaki Dizaji Research interest now focuses on High Power Ultrasonic Technology in agricultural waste treatment and Non-Destructive Techniques for Food Authentication (especially on UT, E-Nose, and Image processing).  

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Published

2025-03-31

Issue

Vol. 27 No. 1 (2025): CIGR Journal

Section

VI-Postharvest Technology and Process Engineering