...粉砂土双硬化弹塑性本构模型 关键词 ： 粉细砂； 剪胀性； 应变软化； 双硬化； 本构模型 [gap=1287]Keywords : fine sands;dilatancy feature;strain softening;double hardening; constitutive model ..
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The wider the sand graduation and the bigger the weight ratio of the fine sands, the bigger the sand carrying capacity of flow in the same hydraulic dynamic condition.
级配越宽，细颗粒泥沙所占的比重越大，则在同等水力条件下水流挟沙力越大。
Those of the fluvial facies, especially the lacustrine facies and palaeosols, are mainly composed of very fine sands and also contain some quantities of silt and clay.
河流相、特别是湖沼相与古土壤以极细砂含量占优势，且具一定含量的粉砂和粘土。
The nitriding process comprises the following steps: cleaning the test piece again with the gasoline or acetone, or blowing sands on the test piece with low wind pressure fine sands;
氮化处理工艺是将试件再次用汽油或丙酮清洗干净，或用低风压细沙进行吹沙；
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