Simulation and Analysis of the Wheat Stem Lodging

Yuan, Zhi Hua; Li, Jian Wei; Tian, Hui; Ding, Pan

doi:10.4028/www.scientific.net/amr.652-654.1416

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…Xue et al 10 used ANSYS to study the bending deformation and stress distribution of cassava hemp stalks under ultimate load. Yuan et al 11 used the finite element software ANSYS/LS-DYNA to establish a model of wheat stalks, simulate and analyse the bending collapse process of wheat stalks under rectangular wind load. The material of plant stalks and their derivatives needs to be harvested and processed, Studying the deformation behavior of the stalk and its interaction with the machine (due to the mechanical loads imposed by the machine) is critical for process optimization and yield efficiency.…”

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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Section: Introductionmentioning

confidence: 99%

Bending mechanics test and parameters calibration of ramie stalks

Zhang

Huang

et al. 2023

Sci Rep

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“…The commercial software LS-DYNA is currently recognized as one of the most outstanding nonlinear finite element simulation software with the functions of explicit analysis and implicit analysis. It has been applied in numerical simulations of material comminution performance in many fields, such as textile (Barauskas et al, 2007), wheat stem (Yuan et al, 2013), concrete (Ma et al, 2020), etc. At present, when LS-DYNA is used to simulate the impact comminution performance of materials, two-dimensional or three-dimensional unilateral impact calculation models of two components are generally adopted (Barauskas et al, 2007;Yuan et al, 2013;Ma et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Effect of Low-Temperature on the Vibration Impact Comminution Performance of Wheat Bran

Cheng

SUN

CHEN

et al. 2022

INMATEH

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With the aim of revealing the effects of low temperature on the vibration impact comminution performance of wheat bran, the impact dynamic performance of wheat bran at different temperatures was simulated by using LS-DYNA. According to the impact collision relationship between grinding medium and wheat bran, a three-component numerical calculation model was established. The impact collision dynamic essence of the model was analyzed, and a solution method based on LS-DYNA was proposed. On this basis, the finite element model of the numerical calculation model was obtained. By adjusting the mechanical parameters of wheat bran in the finite element model, the vibration impact comminution performance of wheat bran at different temperatures were analyzed. It is found that the contact force, contact deformation and comminution energy of wheat bran increase with the decrease of temperature, which indicates that low-temperature comminution of wheat bran is more advantageous than room temperature comminution. However, when the temperature drops from - 40 ℃ to - 80 ℃, the above index parameters almost remain, which indicats that it is more economical to apply low-temperature comminution at the temperature range from - 40 ℃ ~ 0 ℃. This research provided a foundation for the analysis, prediction and optimization of vibration impact comminution performance of wheat bran.

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Evaluating quinoa stem lodging susceptibility by a mathematical model and the finite element method under different agronomic practices

Wang

Shock

et al. 2021

Field Crops Research

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Simulation and Analysis of the Wheat Stem Lodging

Cited by 3 publications

References 4 publications

Bending mechanics test and parameters calibration of ramie stalks

Bending mechanics test and parameters calibration of ramie stalks

Effect of Low-Temperature on the Vibration Impact Comminution Performance of Wheat Bran

Evaluating quinoa stem lodging susceptibility by a mathematical model and the finite element method under different agronomic practices

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