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Research on Anisotropic Viscoelastic Constitutive Model of Compression Molding for CFRP

机译：CFRP压缩成型的各向异性粘弹性本构模型研究

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The carbon-fiber-reinforced polymer (CFRP) is a mainstream material for lightweight products from the end of the 20th century to the present day. Its compression molding process has obvious advantages in mass production. This paper attempts to establish the constitutive models of compression molding of the CFRP materials and study their mechanism. Based on anisotropic linear elastic mechanics, viscoelastic mechanics, and thermodynamics, as well as the Maxwell viscoelastic constitutive model, we first establish the constitutive model of thermorheologically simple CFRP materials (TSMs). Then, considering the influence of temperature on the initial stiffness and equilibrium stiffness, the concept of temperature stiffness coefficient is introduced, and the Cartier coordinate system is converted into a cylindrical coordinate system, thereby establishing the constitutive model of thermorheologically complex materials (TCMs) using the tensor form. Finally, by comparing to the structure of the Zocher model, the two constitutive models established in this study are verified. The research findings have important theoretical research significance for studying the compression molding mechanism of carbon fiber and further improving the quality of product molding.
机译：从20世纪末到今天，碳纤维增强聚合物（CFRP）是轻质产品的主流材料。其压缩成型工艺在批量生产中具有明显的优势。本文试图建立CFRP材料压缩成型的本构模型并研究其机理。基于各向异性线性弹性力学，粘弹性力学和热力学，以及麦克斯韦粘弹性本构模型，我们首先建立热流变简单CFRP材料（TSM）的本构模型。然后，考虑温度对初始刚度和平衡刚度的影响，引入温度刚度系数的概念，并将卡地亚坐标系转换为圆柱坐标系，从而利用热流变复杂材料（TCM）建立本构模型。张量形式。最后，通过与Zocher模型的结构比较，验证了本研究中建立的两个本构模型。研究结果对研究碳纤维的压缩成型机理，进一步提高产品成型质量具有重要的理论研究意义。

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