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首页> 外文期刊>Advances in materials science and engineering >Constitutive Investigation on Viscoelasticity of PolyVinyl Butyral: Experiments Based on Dynamic Mechanical Analysis Method
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Constitutive Investigation on Viscoelasticity of PolyVinyl Butyral: Experiments Based on Dynamic Mechanical Analysis Method

机译：聚乙烯醇缩丁醛粘弹性的本构研究：基于动态力学分析方法的实验

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摘要

PolyVinyl Butyral (PVB) film is now widely used in automotive industry and architectures serving as the protective interlayer. The dynamic modulus of PVB is measured through systematic experiments based on Dynamic Mechanical Analysis (DMA) method at various temperatures, heating rates, and vibration frequencies. Further, viscoelasticity of PVB influenced by time and temperature is systematically studied. Fitted empirical formulas describing the relationship between glass transition temperature and frequency, as well as the heating rate of PVB, are established. The master curve of PVB at 293 K is suggested based on the experiment data as to express the dynamic modulus variation at various frequencies in a wider range. Constitutive behavior of PVB is then analyzed based on Generalized Maxwell (GM) model and Fractional Derivative (FD) model, respectively. It is shown that PVB has higher efficiency of energy dissipation in its high energy absorption state, while both fifth-order GM model and FD model can characterize the viscoelasticity of PVB at glassy transition area. Results may offer useful fundamental experimental data and important constitutive characteristics of PVB and shed lights on further studies on viscoelasticity behavior of PVB and energy mitigation ability of laminated glass.
机译：聚乙烯醇缩丁醛（PVB）薄膜现已广泛用于汽车工业和用作保护性中间层的建筑。 PVB的动态模量是通过基于动态力学分析（DMA）方法的系统实验在各种温度，加热速率和振动频率下进行测量的。此外，系统地研究了受时间和温度影响的PVB的粘弹性。建立拟合的经验公式，描述玻璃化转变温度和频率之间的关系以及PVB的加热速率。根据实验数据，提出了293 K处PVB的主曲线，以表示更宽范围内各种频率下的动态模量变化。然后分别基于广义麦克斯韦（GM）模型和分数阶导数（FD）模型分析PVB的本构行为。结果表明，PVB在高能量吸收状态下具有较高的能量耗散效率，而五阶GM模型和FD模型都可以表征PVB在玻璃化转变区的粘弹性。研究结果可提供有用的基础实验数据和重要的PVB本构特性，为进一步研究PVB的粘弹性和夹层玻璃的能量吸收能力提供参考。

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