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Loading Model and Mechanical Properties of Mature Broccoli ( Brassica oleracea L. Var. Italica Plenck) Stems at Harvest

Author

Listed:
  • Yunfei Zhao

    (Key Laboratory of Modern Agricultural Equipment and Technology of Ministry of Education, Jiangsu University, Zhenjiang 212013, China)

  • Zhong Tang

    (Key Laboratory of Modern Agricultural Equipment and Technology of Ministry of Education, Jiangsu University, Zhenjiang 212013, China)

  • Shuren Chen

    (Key Laboratory of Modern Agricultural Equipment and Technology of Ministry of Education, Jiangsu University, Zhenjiang 212013, China)

Abstract

Stem cutting is the main process of broccoli harvesting, and the structure and mechanical properties of the stem significantly affect the cutting efficiency. In the current research, the structural characteristics and component contents of the broccoli stem are analyzed. Through different processing methods of stretching, compressing and bending, the aim is to obtain the parameters for mechanical properties of broccoli stem, and to provide basic data and reference for establishing visual models of broccoli stem. The test results show: The content of rind is highest in the middle of the stem, the content of xylem is highest in the bottom of the stem, and the content of pith is highest in the top of the stem. The densities of rind, xylem and pith of broccoli stem were 1056.1, 938.9 and 1009.9 kg·m −3 , respectively. The elastic modulus of the rind of broccoli stem was 27.2~47.5 MPa, the elastic modulus of the xylem was 19.2~110.7 MPa, and the elastic modulus of the pith was 6.5~7.5 MPa. The compressive elastic modulus of the stem was 1.3~2 MPa. The bending strength of the broccoli stem was 6.9 MPa, and the bending modulus was 3.1 MPa. The mechanical model of broccoli stem established in this study provides a theoretical basis for cutting and other processes.

Suggested Citation

  • Yunfei Zhao & Zhong Tang & Shuren Chen, 2022. "Loading Model and Mechanical Properties of Mature Broccoli ( Brassica oleracea L. Var. Italica Plenck) Stems at Harvest," Agriculture, MDPI, vol. 12(10), pages 1-25, September.
    • Handle: RePEc:gam:jagris:v:12:y:2022:i:10:p:1519-:d:921853
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    References listed on IDEAS

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    1. Zhe Du & Liyuan Zhang & Xiaolin Xie & Denghui Li & Xinping Li & Zhihong Zhang & Jing Pang & Georgios I. Giannopoulos, 2022. "Application of Grey Relational Analysis and Multiple Linear Regression to Establish the Cutting Force Model of Oil Peony Stalk," Mathematical Problems in Engineering, Hindawi, vol. 2022, pages 1-10, April.
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    Cited by:

    1. Yunlong Cao & Yao Yu & Zhong Tang & Yunfei Zhao & Xinyang Gu & Sifan Liu & Shuren Chen, 2023. "Multi-Tooth Cutting Method and Bionic Cutter Design for Broccoli Xylem ( Brassica oleracea L. var. Italica Plenck)," Agriculture, MDPI, vol. 13(6), pages 1-25, June.

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