Waxy oils are thermal and shear dependent materials as the initial and final cooling temperatures, cooling rate, shear rate applied during the cooling and the aging time affect the rheological properties of the material. As reported in recent papers, the waxy oil equilibrium flow curve is not only a function of thermal and shear histories but also of the maximum shear rate imposed on the sample. In the current work, the effect of the shear history on the flow curve of model waxy oils is revisited by carrying out controlled shear rate experiments in rotational rheometers. The experiments consisted of imposing different shear rate plateaus for different times so as to provide the same total shear deformation. The same flow curve was obtained. These findings change the perspectives for proposals of new constitutive equations of these materials.

蜡质油是热和剪切相关的材料，因为初始和最终冷却温度，冷却速率，冷却过程中施加的剪切速率以及老化时间会影响材料的流变性。如最近的论文所报道，蜡质油的平衡流动曲线不仅是热和剪切历史的函数，而且还是施加在样品上的最大剪切速率的函数。在当前的工作中，通过在旋转流变仪中进行受控的剪切速率实验，重新探讨了剪切历史对模型蜡质油流动曲线的影响。实验包括在不同的时间施加不同的剪切速率平稳期，以提供相同的总剪切变形。获得相同的流动曲线。这些发现改变了提出这些材料新本构方程的观点。