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摘要:
The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We used therefore start-up experiments with constant shear rates and can speak consequently of shear stress instead of viscosity.The shear stress increases sharply at the beginning of the stress growth experiment,passes an overshoot and begins to decrease up to the steady state shear stress.We can assume that a stress growth curve with an overshoot points out to thixotropic behavior.After the steady state shear stress is reached,the shear deformation is stopped,and the stress relaxation begins.It is to be expected that the shear stress will recover after the stress relaxation.Systems with shear thinning and plastic flow behavior were examined.The thixotropy is discussed in relation to the flow behavior.Stress growth experiments were performed with shear rates from the first Newtonian region and from the shear thinning region of the systems with shear thinning flow behavior.Stress start-up experiments were carrying out with shear rates from the first and second yield stress regions and from the transition section of a system with plastic flow behavior.
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篇名 Thixotropy of Systems with Shear Thinning and Plastic Flow Behavior
来源期刊 材料科学与工程:中英文B版 学科 工学
关键词 THIXOTROPY rheopexy SYSTEMS with SHEAR THINNING FLOW BEHAVIOR SYSTEMS with plastic FLOW BEHAVIOR time related FLOW behaviour.
年,卷(期) 2019,(2) 所属期刊栏目
研究方向 页码范围 56-65
页数 10页 分类号 TB
字数 语种
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THIXOTROPY
rheopexy
SYSTEMS
with
SHEAR
THINNING
FLOW
BEHAVIOR
SYSTEMS
with
plastic
FLOW
BEHAVIOR
time
related
FLOW
behaviour.
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研究去脉
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材料科学与工程:中英文B版
双月刊
2161-6221
武汉洪山区卓刀泉北路金桥花园C座4楼
出版文献量(篇)
570
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0
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