| 常明丰,裴建中,黄平明,熊锐.考虑级配颗粒物质间接触力力链的分布概率分析[J].材料导报,2018,32(20):3618-3622 |
| 考虑级配颗粒物质间接触力力链的分布概率分析 |
| Analysis on the Distribution Probability of Force Chain of Contact Force Among Granular Matter Considering Gradation |
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| DOI：10.11896/j.issn.1005-023X.2018.20.022 |
| 中文关键词: 颗粒物质 接触力力链 压痕试验 分布概率 级配 |
| 英文关键词: granular matter, force chain of contact force, indentation test, distribution probability, gradation |
| 基金项目:国家自然科学基金(51408047;51378073;51608046);中央高校基本科研业务费专项资金(310831161002) |
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| 中文摘要: |
| 为了揭示颗粒物质间接触力力链的分布规律,选取10 mm、13 mm、16 mm、19 mm和20 mm五组粒径的刚性颗粒进行复写纸压痕试验,利用概率分析方法研究了单一粒径和考虑级配不同粒径颗粒体内部接触力力链的分布概率。研究结果表明:两种单一粒径的法向力与平均法向力比值f的分布概率呈先增大达到峰值后减小的趋势,分布概率达到峰值处所对应的f值接近1；10 mm颗粒的分布概率曲线所产生的误差较小,20 mm颗粒的分布概率曲线产生的误差相对较大；考虑级配的颗粒体,其分布概率均呈指数形式单调衰减,未出现分布概率峰值,并且强力链比例基本小于10 mm和20 mm的单一粒径颗粒体。 |
| 英文摘要: |
| 10 mm,13 mm,16 mm,19 mm and 20 mm rigid particles were selected to conduct the indentation test to reveal the distribution laws of the force chains of contact force among granular matter. And the distribution probability of the force chains of contact force was studied by the probabilistic analysis method for the granular materials with single particle size and different particle sizes consideration gradation. The results showed that the distribution probabilities of f, which was the ratio of normal force to ave-rage normal force, increased first and then decreased after exceeding the peak value with the increase of f for 10 mm and 20 mm particles. The corresponding f was close to 1 at the peak values of distribution probability. The errors of distribution probability curve of 10 mm particles were smaller. However, the errors of distribution probability curve of 20 mm particles were relatively large. The distribution probabilities of the granular materials considering gradation decay exponentially, and there was no peak of distribution probability. In addition, the proportions of the strong force chains were less than those of 10 mm and 20 mm granular materials basically. |
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