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

Wang, Tao; Liu, Zhengdao; Yan, Xiaoli; Mi, Guopeng; Liu, Suyuan; Chen, Kezhou; Zhang, Shilin; Wang, Xun; Zhang, Shuo; Wu, Xiaopeng

doi:10.3390/agriculture12060894

Cited by 14 publications

(11 citation statements)

References 9 publications

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“…Similar research has been conducted in the context of stalk cutting for sugarcane [13][14][15][16][17], cotton stalks [18,19], tomatoes [20], mulberry branches [21], and wild chrysanthemums [22].…”

Section: Introductionmentioning

confidence: 77%

Study on the Impact of Cutting Platform Vibration on Stalk Cutting Quality in Industrial Hemp

Tian,

Huang,

Zhang

et al. 2024

Agriculture

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In response to the unclear impact of header vibration on cutting performance (stalk cutting quality and cutting energy consumption) during field operations of industrial hemp harvesters, this study utilized a vibration recorder to collect information on header vibration during the operation of industrial hemp harvesters. Through data processing, the dominant range for the resonant frequency and amplitude of the cutting platform is primarily concentrated between 5–45 Hz and 0–35 mm, respectively. Using numerical simulation techniques, a quadratic orthogonal rotation combination experiment was conducted with vibration frequency and amplitude as experimental factors and stalk cutting quality and cutting energy consumption as indicators. Regression equations were established to reveal the relationships between indicators and factors, elucidating the influence of each factor and its interactions on the indicators. Specifically, for the crack length indicator, the amplitude has a highly significant influence on the model, and there is a significant interaction effect between vibration frequency and amplitude on the model. As for the cutting energy consumption indicator, frequency and the interaction between frequency and amplitude significantly affect the model, while amplitude has an extremely significant impact on the model. Through comprehensive fuzzy evaluation, the optimal vibration parameter combination satisfying comprehensive cutting performance indicators was determined as a vibration frequency of 37.86 Hz and an amplitude of 5.34 mm. Furthermore, the reliability of the model has been further validated. This research can provide a reference for improving the field performance of industrial hemp harvesters.

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Section: Introductionmentioning

confidence: 77%

Study on the Impact of Cutting Platform Vibration on Stalk Cutting Quality in Industrial Hemp

Tian,

Huang,

Zhang

et al. 2024

Agriculture

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“…Based on the establishment of the constitutive relations of the physical models of wood and sugarcane,the ramie stalk is abstracted as a composite material composed of bast fiber and xylem, and its performance is homogeneous, linear elastic. The parameters in the constitutive relation are determined by bending tests and consulting data 8 – 10 , 20 . Based on the assumptions of ramie geometry, ramie has an axial rotation and the existence of orthogonal symmetrical planes gives it the characteristics of a transverse orthogonal anisotropic material.…”

Section: Methodsmentioning

confidence: 99%

“…But the poisson's ratio of ramie fibre and wood could not be obtained directly from the tests. Wang et al 8 calibrated the cutting finite element model of wild chrysanthemum stalks during harvest, screened the significantly influential test factors by P-B tests, obtained the optimal parameters by central combination design, and conducted cutting force simulations to verify the accuracy of the parameters. Hou et al 9 studied the bending mechanical properties of different varieties of castor stalks at various levels of factors, the effect of fiber duct content on the flexural strength of stalk was studied by establishing a finite element model.…”

Section: Introductionmentioning

confidence: 99%

Bending mechanics test and parameters calibration of ramie stalks

Zhang

Huang

et al. 2023

Sci Rep

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Research and development of ramie harvesting equipment is a key link to revitalize ramie industry, problems such as the tendency of stalks to tangle and clog the machine are very problematic, seriously affect the quality and fluency of the harvester. The structure of ramie stalk is complex, and the mechanical properties of each component vary greatly, collision between stalk and machine creates complex stress relationship. By building a finite element model, it is possible to analyze the stress state of the stalk during bending from a microscopic perspective, and to analyze the complex stress–strain situation within the stalk. The purpose of this paper is to establish a standard ramie stalk bending finite element model to provide a theoretical basis for the subsequent kinematics and dynamics. Firstly, material experiments were carried out on ramie straw. The structural and mechanical parameters of the straw components were obtained through measurement and calculation tests, and the force–deformation curves for straw bending were obtained. Bending finite element simulations were carried out on the basis of mechanical tests, and the parameters such as dynamic friction coefficient, wood Poisson's ratio and bast Poisson's ratio were determined by the central combination design. Then established an accurate bending finite element simulation model of ramie stalk, the accuracy of the model was verified at the end. In this paper, the key parameters of the ramie stalk model were calibrated through a combination of material tests and simulations. All parameters of the ramie stalk model were finally obtained, and the bending mechanical properties of the ramie stalk were analysed by applying finite element analysis. This bending mechanics simulation model can be used for kinematic and dynamics simulation analysis of conveying and baling to provide a theoretical basis for the structural design of the harvester. The methods explored here can be applied to other slender straw crops.

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“…Jiang et al [18] calibrated the strain rate, yield stress, and Poisson's ratio of forage rape stems using a shear simulation and stem-breaking test. Wang et al [19] simulated the cutting process of wild chrysanthemum stems and verified the yield stress, failure strain, strain rate, and other parameters using a shear test. Huang et al [20] used a three-point bending simulation and test to calibrate the anisotropic Poisson's ratio of phloem and the isotropic Poisson's ratio of xylem for industrial hemp stems.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Simulation Parameter Calibration and Verification for Stem Cutting of Hydroponic Chinese Kale

Xia,

Li,

Deng

et al. 2024

Agriculture

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The finite element simulation is a valid way for the rapid development of the root-cutting mechanism for hydroponic Chinese kale. The stem of the hydroponic Chinese kale was simplified as a transverse isotropic elastic body, and axial compression, three-point bending, and shear tests were performed. The ANSYS/LS-DYNA19.2 software was adopted for stem shear simulation, and the regression equation of the maximum simulated shear force was established. The optimized mechanical parameters were determined by minimizing the deviation between the maximum shear force obtained from the simulation and test. The three-dimensional scanning method was employed to establish the geometric model of the hydroponic Chinese kale stem. The cutting finite element simulation model and test platform were constructed. Displacement, deformation, and force measured from simulation and test were compared. Through measurement and simulation calibration, an axial elastic modulus of 6.22 MPa, axial Poisson’s ratio of 0.46, radial elastic modulus of 3.56 MPa, radial Poisson’s ratio of 0.44, radial shear modulus of 0.8 MPa, and a failure strain of 0.08 were determined. During the cutting simulation and test, the resulting maximum displacement deviations of the marking points on the end of the stem were 0.68 mm along the X-axis and 2.83 mm along the Y-axis, while the maximum deviations of the cutting and clamping force were 0.49 N and 0.77 N, respectively. The deformation and force variation laws of the kale stem in the cutting simulation and test process were basically consistent. It showed that the mechanical parameters calibrated by the simulation were accurate and effective, and the stem cutting simulation results with the finite element method were in good agreement with that of the cutting test. The study provided a reference for the rapid optimization design of the root-cutting mechanism for hydroponic Chinese kale harvest.

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

Cited by 14 publications

References 9 publications

Study on the Impact of Cutting Platform Vibration on Stalk Cutting Quality in Industrial Hemp

Study on the Impact of Cutting Platform Vibration on Stalk Cutting Quality in Industrial Hemp

Bending mechanics test and parameters calibration of ramie stalks

Finite Element Simulation Parameter Calibration and Verification for Stem Cutting of Hydroponic Chinese Kale

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