Typical Lubricating Greases as Linear Viscoelastic Materials
Typical Lubricating Greases as Linear Viscoelastic Materials
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作为线性粘弹性材料的典型润滑脂
DOI：
10.1122/1.549001
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发表时间：
1965
期刊：
影响因子：
--
通讯作者：
D. Criddle
中科院分区：
文献类型：
--
作者：
D. Criddle
本文报道了典型润滑脂流变学特性的实验研究结果。比较了稳态剪切和应力松弛和蠕变的瞬态剪切条件下的粘度-剪切速率关系。在稳态剪切下，系统是非牛顿的，但在剪切应力松弛的瞬态条件下，当应变接近其极限屈服应变时，系统是线性粘弹性的。两种润滑脂的线性粘弹性性质通过对小应变扭转摆阻尼的研究得到了证实。通过对文献中蠕变数据的分析，表明钠皂脂是线性粘弹性的。对线性粘弹性行为的大范围应变的认识简化了润滑脂流动和变形的研究。
The results of an experimental study of rheological properties of typical lubricating greases are reported in this paper. Viscosity‐shear rate relations are compared for steady‐state shear and for transient shear conditions of stress relaxation and creep. In steady‐state shear the systems are non‐Newtonian, but under transient conditions of shear stress relaxation, they are linear viscoelastic for strains approaching their ultimate yield strain. The linear viscoelastic nature of two greases was confirmed by studies of the damping of a torsion pendulum for small strains. A sodium soap grease is shown to be linear viscoelastic by an analysis of creep data from the literature. Recognition of the wide range of strains for linear viscoelastic behavior simplifies the study of the flow and deformation of greases.