Nonisothermal model of glass fiber drawing stability
Nonisothermal model of glass fiber drawing stability
复制标题
玻璃纤维拉丝稳定性的非等温模型
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
Xiaoyong Lu
中科院分区：
文献类型：
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作者：
G. Gupta;W. Schultz;E. Arruda;Xiaoyong Lu
牵伸共振是由等速绕线机引起的，导致轴向力不恒定（Schultz, 1984）。充分研究的等温牛顿纤维拉伸预测非常适中的临界拉伸比（约20，远低于玻璃纤维的典型生产拉伸比103 - 105）。本文提出的非等温纤维拉伸模型表明，沿自旋线冷却对拉伸过程具有很强的稳定性。然而，我们证明了Shah和Pearson （1972a,b）关于非等温牛顿纤维纺丝是无条件稳定的结论是基于非收敛的数值结果。粘温相关函数的选择对过程的稳定性有很大的影响。虽然粘弹性通常对稳定性有不利影响，但在存在拉伸减薄的情况下，低粘弹性有助于略微提高最大临界拉伸比。
Draw resonance is caused by a constant speed winder that leads to non-constant axial forces (Schultz, 1984). The well studied isothermal Newtonian fiber drawing predicts very modest critical draw ratios (around 20, much less than the typical production draw ratios for glass fibers of 103 – 105). The nonisothermal fiber drawing model presented here shows that cooling along the spin line strongly stabilizes the process. However, we show that the conclusion of Shah and Pearson (1972a,b) that non-isothermal Newtonian fiber spinning is unconditionally stable is based on non-converged numerical results. The choice of viscosity-temperature correlation function has a strong influence in determining the stability of the process. While viscoelasticity generally has an adverse effect on the stability, low viscoelasticity in the presence of extensional thinning helps to slightly improve the maximum critical draw ratio.