摘要
用一台自己设计的仪器对型砂砂粒间粘土膜进行了测试。结果分析显示：粘土膜的流变特性可以用宾汉体－开尔文体流变模型，亦即Ｂ－Ｋ模型表达；同时观察到，在其变形过程中有应力松弛及触变现象。文中讨论了它们在型砂紧实过程中可能起作用的程度。
Rheological behaviour of bentonite film between grains of molding sand were tested with a self-designed apparatus.Test results show that rheological character of the bentonite film can be expressed as Bingham-Kelvin model or B-K niodel.Further,thixotropy and stress-relaxalion were observed during deformation of bentonite filmand the degree of their effect on the compaction of molding sand were estimated.
出处
《机械工程学报》
EI
CAS
CSCD
北大核心
1994年第2期76-81,共6页
Journal of Mechanical Engineering
基金
中国科学院科学基金
关键词
型砂
粘土膜
流变性
Molding sand Bentonite film Rheological character
