Wheat straw direct shear simulation using discrete element method of fibrous bonded model

Schramm, Matthew W.; Tekeste, Mehari Z.

doi:10.1016/j.biosystemseng.2021.10.010

Cited by 27 publications

(4 citation statements)

References 17 publications

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“…The three-point bending test followed similar methods described by Schramm and Tekeste (2022). During August 2022, 36 representative, healthy, mature leaves were selected from each variety from the pots grown in the greenhouse.…”

Section: Traffic Groupsmentioning

confidence: 99%

Comparative study of morphological, anatomical, cell wall compositional, and leaf elemental features of traffic‐tolerant versus traffic‐sensitive tall fescue (Festuca arundinacea)

Donelan,

Thoms,

Arora

et al. 2023

Crop Science

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Turfgrass traffic‐tolerance is essential for athletic field aesthetics and performance. Tall fescue (Festuca arundinacea Scherb.; syn. Schedonorus arundinaceus [Schreb.] Dumort., nom. cons.) is utilized on athletic fields due to its high tolerance to traffic stress. However, the physio‐chemical characteristics and mechanisms associated with traffic‐tolerance are not understood. Therefore, identifying traffic‐tolerant characteristics would be beneficial for selecting future turfgrass varieties. The objective of this study was to identify morphological, mechanical, and anatomical characteristics of traffic‐tolerant and ‐sensitive tall fescue varieties. Simulated traffic was applied to the 2018 National Turfgrass Evaluation Program tall fescue trial at the Iowa State Horticulture Research Station. A modified Baldree Traffic Simulator applied twenty‐four simulated traffic events yearly during August and September 2019–2021. The four most traffic‐tolerant/‐sensitive varieties, each, were selected based on the average final percent green cover after simulated traffic. Evaluations included leaf width and thickness, leaf angle, plant density, intercellular void space, maximum and final resistive force of three‐point‐bending testing. Additionally, cell wall constituents, hemicellulose, cellulose, lignin, and concentration of three elements (N, Ca, K) were quantified in the leaf. Compared to traffic‐sensitive varieties, the traffic‐tolerant group (SE5302, SE5STAR, BGR‐TF3, and PST‐5DART) exhibited wider leaves (3.53 vs. 2.73 mm), lower plant density (23.4 vs 38.6 plants 7 cm−2), larger intercellular void space (29,532 vs. 10,051 μm2), greater maximum resistive force (0.607 vs 0.350 N), and greater final displacement force (0.531 vs. 0.288 N). The identification of these characteristics could be used as selection criteria for traffic‐tolerant varieties of tall fescue in future.This article is protected by copyright. All rights reserved

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Section: Traffic Groupsmentioning

confidence: 99%

Comparative study of morphological, anatomical, cell wall compositional, and leaf elemental features of traffic‐tolerant versus traffic‐sensitive tall fescue (Festuca arundinacea)

Donelan,

Thoms,

Arora

et al. 2023

Crop Science

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“…To improve the accuracy of the simulation results of maize straw, Tong Shihe et al proposed a method to build a refined simulation model of maize straw based on the discrete element method (DEM) to construct simulation models of stalked and unstalked straw [7]. Schramm et al used EDEM to calibrate the modulus of elasticity and Poisson's ratio of wheat straw in a three-point bending simulation test and a uniaxial compression simulation test; the relative error with the physical test results was only 3.11% [8]. To solve the lack of accurate models available for the discrete element modeling of rice clearing material clogging and improve the accuracy of the parameters used in discrete element modeling and simulation studies of rice plants, Hou J et al used the Plackett-Burman, Central Composite, and Box-Behnken test methods based on the discrete element HBP simulation model parameters and bonding parameters for discrete element simulation calibration and the discrete element modeling of rice plants to provide a parametric basis for discrete element simulation studies [9].…”

Section: Introductionmentioning

confidence: 99%

Calibration and Modeling of Parameters for Kale Root Stubble Simulation Based on the Discrete Unit Method

Chen,

Jiang,

Liu

et al. 2023

Agronomy

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Today, the post-harvest root stubble treatment of kale in Hunan mostly uses manual pulling and centralized treatments, which are inefficient and labor-intensive. In this study, to realize the direct mechanical crushing of kale root stubble and return it to the field after harvesting, we established an accurate simulation model of kale root stubble by creating a model of the root stubble of kale and calibrating the parameters of the simulation. This study took Jingfeng No. 1 kale stubble as the research object and used EDEM2021.2 simulation software to study the parameters of the kale stubble-crushing simulation model. The peak shear force of the sheared kale root stubble was used as the test data, and the most significant factors affecting the shear force were screened out through the Plackett–Burman test for the Design-Expert design. In addition, the steepest climb test and Box–Behnken test were used to accurately assess the factor data to obtain the best simulation value, which was 861.02 N. The relative error between the simulated and measured values was 0.61%. Finally, an accurate simulation stubble model was established by combining the best simulation parameters with the measured stubble length and diameter. This model provides a theoretical basis and technical support for more in-depth research on stubble simulation and mechanized stubble return.

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“…As with other plants, the physical and mechanical properties of green forage maize have a significant effect on the selection and design of machinery or equipment in the process of harvesting, shredding, processing and transportation. Most studies on the physical and mechanical properties of crops have been done during their development using failure criteria (force, stress and energy) and the Young's modulus [4][5][6] for the past few years. Among these properties, compression, tension, bending, density, friction and cutting are the main factors affecting crop harvesting and processing [7,8] .…”

Section: Introductionmentioning

confidence: 99%

Bending properties of green forage maize in field

Fu,

Xue,

et al. 2023

International Journal of Agricultural and Biological Engineering

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Stalk lodging is prone to occur during the harvesting of green forage maize due to the header and root anchorage, resulting in loss of harvest. In particular, the fallen stalk wraps around the header, causing a blockage and increasing the energy cost. To address this problem, the deflection model was analyzed and established and a novel method to explore the field bend characteristics of green forage maize was proposed. The effects of stalk diameter, bending angle, and cutting height on bending stress and Young's modulus were explored by using the method of in-situ measurement. Additionally, the bending deflection, axial displacement and measuring point displacement were obtained. Experimental results indicate that the stalk diameter and bending angle have a significant influence on bending stress. The bending stress has a positive correlation with bending angle and cutting height, while there is a negative correlation with stalk diameter. On the other hand, the bending angle, stalk diameter, and cutting height are closely related to the Young's modulus. The mean values of the Young's modulus decrease as a quadratic function with the increasing diameter and bending angle, while the cutting height has the opposite effect on it. Besides, the average values of bending deflection, axial displacement, and measuring point displacement exhibit an increasing trend when the bending angle and cutting height increase. This study results can provide a reference for studying the failure mechanism of green forage maize stalk harvesting, and the design of green forage maize harvesting machinery.

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Wheat straw direct shear simulation using discrete element method of fibrous bonded model

Cited by 27 publications

References 17 publications

Comparative study of morphological, anatomical, cell wall compositional, and leaf elemental features of traffic‐tolerant versus traffic‐sensitive tall fescue (Festuca arundinacea)

Comparative study of morphological, anatomical, cell wall compositional, and leaf elemental features of traffic‐tolerant versus traffic‐sensitive tall fescue (Festuca arundinacea)

Calibration and Modeling of Parameters for Kale Root Stubble Simulation Based on the Discrete Unit Method

Bending properties of green forage maize in field

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