加拿大草原上使用的耙齿的结构分析和疲劳预测。

Discover applied sciences Pub Date : 2024-01-01 Epub Date: 2024-11-14 DOI:10.1007/s42452-024-06310-5
Arafater Rahman, Mohammad Abu Hasan Khondoker
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引用次数: 0

摘要

加拿大大草原因其农业对全球粮食市场的巨大贡献而闻名于世。耙齿是农用设备中不可或缺的部件,特别是在种植作物前的土壤整理和杂草控制中。在操作过程中,这些耙齿会受到反复的循环载荷,最终导致疲劳失效。对市售的三种不同的耙齿(0.562HT、0.625HT 和 0.500HT)进行了疲劳试验评估,并通过有限元分析(FEA)进行了验证。在各种实际挠度下,对不同挠度的疲劳寿命进行了估算,与其他挠度相比,0.562HT 的疲劳寿命具有突破性。研究结果表明,疲劳寿命与几何形状、线圈数量、俯仰角、支腿长度和线圈直径有很大关系。为研究线径影响而开发的 0.354HT 模型与 0.500HT 模型非常相似。分析了四种不同型号的耙齿在相同偏差下的耙地能力。对实验断裂表面进行了形态学研究。这项研究节省了时间,减轻了农民经常面临的不可预测的疲劳故障,对草原农业的加速发展具有无可挑剔的影响。即使是观察到的失效现象也可以作为开发更可靠、更耐用的耙齿的动力,从而提高农业效率:在线版本包含补充材料,可查阅 10.1007/s42452-024-06310-5。
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Structural analysis and fatigue prediction of harrow tines used in Canadian prairies.

The Canadian prairies are renowned for their substantial agricultural contributions to the global food market. Harrow tines are indispensable in farming equipment, especially for soil preparation and weed control before planting crops. During operation, these tines are exposed to repetitive cyclic loading, which eventually causes fatigue failure. Commercially available three different harrow tines named 0.562HT, 0.625HT, and 0.500HT undergo an experimental fatigue evaluation and are validated through Finite Element Analysis (FEA). Fatigue life estimation for different deflections under various real-field deflections was carried out where 0.562HT showed groundbreaking life compared with others. The study results showed that the fatigue life is highly dependent on geometry, number of coils, pitch angle, leg length, and coil diameter. The 0.354HT model, developed to investigate the effect of wire diameter, closely resembles the 0.500HT model. The harrowing ability of the four different harrow tine models against identical deflections has been analyzed. Experimental fractured surfaces went through morphological investigation. This research has an impeccable impact on prairies' agricultural acceleration by saving time and mitigating unpredictable fatigue failure often faced by farmers. Even the observed failure phenomena can serve as motivation to develop more reliable and durable harrow tines, which could increase agricultural efficiency.

Supplementary information: The online version contains supplementary material available at 10.1007/s42452-024-06310-5.

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