The flow characteristics of angel O/W emulsion, which is a yield stress fluid, was investigated. The hysteresis loop test was conducted for the strain below the slip yield point, and the single relaxation Maxwell model was used to fit the experimental data. Using these methods, the shear-rate dependence, stress dependence, and time dependence of the viscoelastic properties of the sample were evaluated in the region below the slip yield point. The shear-rate dependence induced by the stress-ramp rate and the stress dependence from the maximum applied stress influence the viscoelastic characteristics below the slip yield point in terms of the flow history. However, the time dependence of the viscoelastic characteristics could not be confirmed for any creep time. The yield stress measured in the stress-ramp test increases with the stress-ramp rate owing to the contribution of the viscous strain from the flow history.

中文翻译：

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滑移屈服点以下的磁滞回线试验，对屈服应力流体的流动和屈服特性

研究了屈服应力流体Angel O / W乳液的流动特性。对低于滑移屈服点的应变进行了磁滞回线测试，并使用单张弛豫麦克斯韦模型拟合实验数据。使用这些方法，在滑移屈服点以下的区域评估了样品的粘弹性质的剪切速率依赖性，应力依赖性和时间依赖性。由应力斜率引起的剪切率依赖性和来自最大施加应力的应力依赖性在流动历史方面影响滑移屈服点以下的粘弹性特性。但是，对于任何蠕变时间都无法确认粘弹性特性的时间依赖性。