| 土壤表面划痕与颗粒碰撞磨蚀实验研究 |
| |
| 引用本文： | 贾晓鹏,王海兵.土壤表面划痕与颗粒碰撞磨蚀实验研究[J].中国沙漠,2009,29(2):219-222. |
| |
| 作者姓名： | 贾晓鹏 王海兵 |
| |
| 作者单位： | 中国科学院寒区旱区环境与工程研究所 沙漠与沙漠化重点实验室, 甘肃 兰州 730000 |
| |
| 基金项目： | 国家科技支撑计划，中国科学院"百人计划"项目，国家自然科学基金，中国科学院知识创新重要方向性项目 |
| |
| 摘 要： | 在沙漠地区,风蚀作用可以导致土壤表面破碎,土壤表面的性质不同,破碎的程度也不尽相同。划痕方法在测量土壤表面的比研磨能量上具有较好的效果,使用通用微型摩擦计(UMT)测量沙土、沙壤土、粉沙壤土、壤土,粉沙粘壤土和粉沙粘土6种不同土壤类型的土壤表面相对磨蚀能量和相对表面硬度,发现土壤表面相对硬度对土壤表面相对磨蚀能量有很大的影响。对沙土,沙壤土、粉沙壤土、壤土、粉沙粘壤土和粉沙粘土6种不同类型的土壤表面进行了颗粒碰撞磨蚀试验,结果表明,土壤表面的碰撞磨蚀速率与碰撞颗粒速度的平方成正比、土壤平均颗粒大小的2.6次方成正比,而与土壤表面相对磨蚀能量的1.5次方成反比,与土壤相对硬度的1.7次方成反比。
|
| 关 键 词： | 划痕 磨蚀 表面硬度 碰撞磨蚀速率 |
| 收稿时间： | 2008-2-25 |
| 修稿时间： | 2008-6-5 |
Experimental Study of Soil Surface Scratch and Particles Impacting Abrasion |
| |
| JIA Xiao-peng,WANG Hai-bing.Experimental Study of Soil Surface Scratch and Particles Impacting Abrasion[J].Journal of Desert Research,2009,29(2):219-222. |
| |
| Authors: | JIA Xiao-peng WANG Hai-bing |
| |
| Institution: | Key Laboratory of Desert and Desertification, Cold and Arid Regions Environmental and Engineering Institute, Chinese Academy of Sciences, Lanzhou 730000, China |
| |
| Abstract: | In desert regions, aeolian abrasion could make particles and aggregates fracture from the soil surface, and the fragmentation degree varies with different soil surface properties. This paper used a Universal Micro-Tribometer (UMT) to measure the surface specific abrasive energies and specific surface hardness of six soil types: sandy soil, sand loam, silt loam, loam, silt clay loam, and silt clay. The results demonstrated that the surface hardness of soils showed strong influences on its surface specific abrasive energy. Experiment of solid particles impacting erosion on these six soil surfaces showed that the soil surface impacting abrasion rate is in direct proportion to the square of particle speed and to the 2.6 power of mean grain size, whereas in inverse proportion to the 1.5 power of surface specific abrasive energy and to the 1.7 power of specific surface hardness. |
| |
| Keywords: | scratching abrasion specific surface hardness impacting abrasion rate |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《中国沙漠》浏览原始摘要信息 |
| 点击此处可从《中国沙漠》下载免费的PDF全文 |
|
