Industrial Materials Institute (IMI), National Research Council of Canada (NRC), 75 de Mortagne, Boucherville, Québec, Canada, J4B 6Y4.
J Chem Phys. 2012 Feb 21;136(7):074903. doi: 10.1063/1.3685832.
To understand the various mechanisms of fiber deformation of flexible fiber suspensions, we carry out a direct simulation study to analyze the effect of fiber rigidity on fiber motion in simple shear flow. Such a study may be used to investigate the critical parameters controlling the breakage of flexible fibers during processing. We model the fiber as a series of rigid spheres connected by stiff springs. The stretching, bending, and torsional rigidities are determined by Young's modulus and shear modulus to realistically model the fiber rigidity. The model correctly predicts the orbit period of fiber rotation, T ̇γ, as well as the trend of critical flow strength, η ̇γ/E, versus fiber aspect ratio, r(p), at which breakage occurs in simple shear flow.
为了理解柔性纤维悬浮液中纤维变形的各种机制，我们进行了直接模拟研究，以分析纤维刚性对简单剪切流中纤维运动的影响。这种研究可用于研究控制在加工过程中柔性纤维断裂的关键参数。我们将纤维建模为一系列通过硬弹簧连接的刚性球体。通过杨氏模量和剪切模量确定拉伸、弯曲和扭转刚度，以真实地模拟纤维刚性。该模型正确地预测了纤维旋转的轨道周期 T ̇γ，以及在简单剪切流中发生断裂时，临界流动强度 η ̇γ/E 与纤维纵横比 r(p)的趋势。
