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2018 Vol.43, Issue 3 Preview Page
Measurement of Mechanical and Physical Properties of Pepper for Particle Behavior Analysis
Ju-Seok Nam1
Jun-Hee Byun2
Tae-Hyeong Kim2
Myoung-Ho Kim23
Dae-Cheol Kim23*
1Department of Biosystems Engineering, Kangwon National University, 1 Kangwondaehak-gil, Chuncheon, Gangwon-do, 24341, Republic of Korea
2Department of Bio-industrial Machinery Engineering, Chonbuk National University, 567 Baekje-daero, deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea
3Institute for Agricultural Machinery & ICT Convergence, Chonbuk National University, 567 Baekje-daero, deokjin-gu, Jeonju, Jeollabuk-do, 54896, Republic of Korea
* Corresponding Author
September 2018. pp. 173-184
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Abstract

Purpose: This study was conducted to investigate the mechanical and physical properties of a Korean red pepper variety for particle behavior analysis. Methods: Poisson’s ratio, modulus of elasticity, shear modulus, density, coefficient of restitution, and coefficient of friction were derived for “AR Legend,” which is a domestic pepper variety. The modulus of elasticity and Poisson’s ratio were measured through a compression test using a texture analyzer. The shear modulus was calculated from the modulus of elasticity and Poisson’s ratio. The density was measured using a water pycnometer method. The coefficient of restitution was measured using a collision test, and the static and dynamic friction coefficients were measured using a inclined plane test. Each test was repeated 3–5 times except for density measurement, and the results were analyzed using mean values. Results: Poisson’s ratios for the pepper fruit and pepper stem were 0.295 and 0.291, respectively. Elastic moduli of the pepper fruit and pepper stem were 1.152 × 107 Pa and 3.295 × 107 Pa, respectively, and the shear moduli of the pepper fruit and pepper stem were 4.624 × 106 Pa and 1.276 × 107 Pa, respectively. The density of the pepper fruit and the pepper stem were 601.8 kg/m3 and 980.4 kg/m3, respectively. The restitution coefficients between pepper fruits, pepper stems, a pepper fruit and a pepper stem, a pepper fruit and plastic, and a pepper stem and plastic were 0.383, 0.218, 0.277, 0.399, and 0.148, respectively. The coefficients of static friction between pepper fruits, pepper stems, a pepper fruit and a pepper stem, a pepper fruit and plastic, and a pepper stem and plastic were 0.455, 0.332, 0.306, 0.364, and 0.404, respectively. The coefficients of dynamic friction between a pepper fruit and plastic and a pepper stem and plastic were 0.043 and 0.034, respectively.

Keywords
Discrete element method
Mechanical property
Pepper
Pepper harvester
Physical Property
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Information
  • Publisher :The Korean Society for Agricultural Machinery
  • Publisher(Ko) :한국농업기계학회
  • Journal Title :Journal of Biosystems Engineering
  • Journal Title(Ko) :바이오시스템공학
  • Volume : 43
  • No :3
  • Pages :173-184
  • Received Date :2018. 07. 24
  • Revised Date :2018. 08. 20
  • Accepted Date : 2018. 08. 24
  • DOI :https://doi.org/10.5307/JBE.2018.43.3.173
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