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arXiv 0903.0023cond-mat.softcond-mat.mtrl-sci
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玻璃态聚合物应变硬化模量与流动应力的关系

Scaling of the Strain Hardening Modulus of Glassy Polymers with the Flow Stress

M. O. Robbins, R. S. Hoy

摘要:

在最近的一封信中,Govaert等人研究了五种不同玻璃态聚合物的应变硬化模量$G_r$和流动应力$σ_{flow}$之间的关系。在每种情况下,$G_r$在不同应变速率或不同温度下的结果与流动应力呈线性相关。他们认为这种线性关系与模拟结果不一致。从以前的出版物和新的结果的数据显示,模拟也产生模量和流动应力之间的线性关系。模量与流变应力的比值随温度和应变速率的变化的可能的解释进行了讨论。

英文摘要:

In a recent letter, Govaert et al. examined the relationship between strain hardening modulus $G_r$ and flow stress $σ_{flow}$ for five different glassy polymers. In each case, results for $G_r$ at different strain rates or different temperatures were linearly related to the flow stress. They suggested that this linear relation was inconsistent with simulations. Data from previous publications and new results are presented to show that simulations also yield a linear relation between modulus and flow stress. Possible explanations for the change in the ratio of modulus to flow stress with temperature and strain rate are discussed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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