The elastic stiffness tensor of cellulosic viscose fibers measured with Brillouin spectroscopy

IF 4.6 Q1 OPTICS Journal of Physics-Photonics Pub Date : 2024-06-02 DOI:10.1088/2515-7647/ad4cc6
Caterina Czibula, Manfred H Ulz, Alexander Wagner, Kareem Elsayad, Ulrich Hirn and Kristie J Koski
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Abstract

Brillouin light scattering spectroscopy is applied to study the micromechanics of cellulosic viscose fibers, one of the commercially most important, man-made biobased fibers. Using an equal angle scattering geometry, we provide a thorough description of the procedure to determine the complete transversely isotropic elastic stiffness tensor. From the stiffness tensor the engineering-relevant material parameters such as Young’s moduli, shear moduli, and Poisson’s ratios in radial and axial fiber direction are evaluated. The investigated fiber type shows that, at ideal conditions, the material exhibits optical waveguide properties resulting in spontaneous Brillouin backscattering which can be used to obtain additional information from the Brillouin spectra, enabling the measurement of two different scattering processes and directions with only one scattering geometry.
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用布里渊光谱法测量纤维素粘胶纤维的弹性刚度张量
布里渊光散射光谱法用于研究纤维素粘胶纤维的微观力学,该纤维是商业上最重要的人造生物基纤维之一。利用等角散射几何原理,我们全面描述了确定完整横向各向同性弹性刚度张量的过程。从刚度张量中可以评估与工程相关的材料参数,如纤维径向和轴向的杨氏模量、剪切模量和泊松比。所研究的光纤类型表明,在理想条件下,材料具有光波导特性,会产生自发的布里渊反向散射,可用于从布里渊光谱中获取更多信息,从而只需一个散射几何形状就能测量两种不同的散射过程和方向。
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来源期刊
CiteScore
10.70
自引率
0.00%
发文量
27
审稿时长
12 weeks
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