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Determination of the fracture energy in polymeric films by in situ photoelasticimetry on double edge notch specimen

机译:双刃口试样原位光弹性法测定聚合物薄膜的断裂能

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The fracture toughness is key parameters to select polymeric films. The essential work of fracture (EWF) is a phenomenological but efficient way to characterize this resistance to fracture. One can gain valuable information on the resistance to perforation and propagation of flaws. A new technique was developed to better understanding the EWF experiments. A tensile test combined to photoelasticimetry allows following in situ the geometry and amount of plastic deformation on double edge notched specimen. The EWF parameters are determined when the plastic deformation appears constant, so when the fracture energy W-f only contributes to rupture filament. This new methodology requires just a single sample, whereas at least five specimens are required for general method. It will help characterize expensive polymeric films or reveal the heterogeneous behavior, for instance after polymer ageing. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 132, 42854.
机译:断裂韧性是选择聚合物膜的关键参数。断裂的基本功(EWF)是一种现象学但有效的方法来表征这种抗断裂性能。一个人可以获得关于缺陷的抵抗和传播的有价值的信息。开发了一种新技术以更好地了解EWF实验。将拉伸试验与光弹性测定法相结合,可以原位跟踪双刃缺口试样的几何形状和塑性变形量。 EWF参数是在塑性变形出现恒定时确定的,因此,当断裂能W-f仅导致细丝断裂时。这种新方法只需要一个样本,而常规方法至少需要五个样本。它将有助于表征昂贵的聚合物薄膜或揭示异质行为,例如在聚合物老化之后。 (c)2015 Wiley Periodicals,Inc. J. Appl。 Polym。科学2016,132,42854。

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