Finite Element Model Construction and Cutting Parameter Calibration of Wild Chrysanthemum Stem

Tao Wang, Zhengdao Liu, Xiaoli Yan, Guopeng Mi, Suyuan Liu, Kezhou Chen, Shilin Zhang, Xun Wang, Shuo Zhang and Xiaopeng Wu
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Tao Wang: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Zhengdao Liu: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Xiaoli Yan: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Guopeng Mi: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Suyuan Liu: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Kezhou Chen: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Shilin Zhang: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Xun Wang: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Shuo Zhang: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Xiaopeng Wu: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China

Agriculture, 2022, vol. 12, issue 6, 1-12

Abstract: Due to a lack of an accurate model in finite element simulation of mechanized harvesting of wild chrysanthemum, the stem of wild chrysanthemum in the harvesting period is taken as the research object. ANSYS Workbench 19.0 software and LS-DYNA software (LS-PrePOST-4.3-X64) are used to calibrate the finite element simulation model of wild chrysanthemum stem cutting. The stem diameter distribution at the cutting height of the chrysanthemum is obtained. The maximum shear forces at different diameters (7 mm, 8 mm, 9 mm, 10 mm, and 11 mm) within the cutting range are determined as 120.0 N, 159.2 N, 213.8 N, 300.0 N, and 378.2 N, respectively, by using a biomechanical testing machine and a custom-made shear blade. The Plastic_Kinematic failure model is used to simulate the cutting process by the finite element method. The Plackett–Burman test is employed to screen out the test factors that significantly affect the results, namely, the yield stress, failure strain, and strain rate parameter C. The regression model between the shear force and significant parameters is obtained by central composite design experiments. To obtain the model parameters, the measured values are substituted into the regression equation as the simulation target values. In other words, the yield stress is 17.96 MPa, the strain rate parameter C is 87.27, and the failure strain is 0.0387. The maximum shear force simulation test is carried out with the determined parameters. The results showed that the maximum error between the simulated and the actual value of the maximum shear force of wild chrysanthemum stems with different diameters is 7.8%. This indicates that the calibrated parameters of the relevant stem failure model can be used in the finite element method simulation and provide a basis for subsequent simulations.

Keywords: Chrysanthemum indicum L.; maximum shear force; finite element; calibration (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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