垂直荷载和充气压力对人工土壤上轮胎与土壤相互作用的影响

IF 2.4 3区 工程技术 Q3 ENGINEERING, ENVIRONMENTAL Journal of Terramechanics Pub Date : 2023-12-15 DOI:10.1016/j.jterra.2023.11.002
Nisreen Alkhalifa , Mehari Z. Tekeste , Pius Jjagwe , Thomas R. Way
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引用次数: 0

摘要

在刚性表面和人造土壤上进行了单个轮胎土壤仓测试,将子午线轮胎(LT235/75R15)垂直加载到两个轮胎垂直载荷(6 kN 和 8 kN),并将轮胎充气压力提升到三个级别(179、241 和 283 kPa)。将轮胎充气压力降低 37%,接触长度分别增加了 26%(6 千牛垂直负载)和 39%(8 千牛垂直负载)(P < 0.05)。人工土壤(初始体积密度为 1.51 Mg/m3)上的二维接触面积在每种载荷情况下都受到轮胎充气压力的显著影响(P < 0.05)。增加载荷会明显影响轮胎在土壤上的接触长度(P = 0.0010);然而,轮胎充气压力不会明显影响轮胎在土壤上的接触长度(P = 0.0609)。土壤车辙深度和轮胎-土壤变形量受垂直荷载和轮胎充气压力的影响不大。测量到的轮胎与土壤表面的接触面积是刚性表面接触面积的 3.3 倍,这表明在评估低地压轮胎技术对牵引力和减少土壤压实的影响时,在可变形土壤上的轮胎与土壤相互作用界面特性优于使用总平板。
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Effects of vertical load and inflation pressure on tire-soil interaction on artificial soil

Instrumented single tire soil bin testing was conducted on a rigid surface and artificial soil by vertically loading a radial tire (LT235/75R15) to two tire vertical loads (6 kN and 8 kN) inflated to three levels of tire inflation pressure (179, 241, and 283 kPa). Lowering the tire inflation pressure by 37 % resulted in 26 % (6 kN vertical load) and 39 % (8 kN vertical load) greater contact lengths (P < 0.05). The 2-D contact area on artificial soil (initial bulk density of 1.51 Mg/m3) was significantly affected (P < 0.05) by tire inflation pressure for each load case. Increasing the load significantly affected the tire’s contact length on soil (P = 0.0010); however, tire inflation pressure did not significantly affect the contact length on soil (P = 0.0609). Soil rut depth and tire-soil deformed volume were not significantly affected by vertical load and tire inflation pressure. Measured tire contact area on soil surface was 3.3 times the contact area on the rigid surface, suggesting tire-soil interaction interface properties on deformable soil are better than using the gross flat plate for evaluating low ground pressure tire technology effects on traction and reducing soil compaction.

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来源期刊
Journal of Terramechanics
Journal of Terramechanics 工程技术-工程:环境
CiteScore
5.90
自引率
8.30%
发文量
33
审稿时长
15.3 weeks
期刊介绍: The Journal of Terramechanics is primarily devoted to scientific articles concerned with research, design, and equipment utilization in the field of terramechanics. The Journal of Terramechanics is the leading international journal serving the multidisciplinary global off-road vehicle and soil working machinery industries, and related user community, governmental agencies and universities. The Journal of Terramechanics provides a forum for those involved in research, development, design, innovation, testing, application and utilization of off-road vehicles and soil working machinery, and their sub-systems and components. The Journal presents a cross-section of technical papers, reviews, comments and discussions, and serves as a medium for recording recent progress in the field.
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