Study on residual stress in carbon fibres by Raman spectroscopy

Hanchen Liu; Qiuping Wang; Junfang Wu; Chonghui Zhang; Jing Wang; Yuanhe Tang

doi:10.1117/12.821449

6 March 2009 Study on residual stress in carbon fibres by Raman spectroscopy

Hanchen Liu, Qiuping Wang, Junfang Wu, Chonghui Zhang, Jing Wang, Yuanhe Tang

Proceedings Volume 7280, Seventh International Conference on Photonics and Imaging in Biology and Medicine; 728018 (2009) https://doi.org/10.1117/12.821449
Event: Photonics and Optoelectronics Meetings, 2008, Wuhan, China

Abstract

Based on the principle that residual stress in crystal lattice leads to change of distance among atoms, an approximate linear relationship between Raman shift and suffered strain of fibers is deduced. According to the stress-strain curve, a linear relationship between the stress and Raman shift is also deduced, and the ratio coefficient of the stress and Raman frequency shift is given. In high intensity carbon fibers, different spectra of the carbon fibers are obtained by Raman spectroscopy. The approximate linear relationship between the carbon fiber tensile strain and Raman shift is validated and the stress factor is given as well. Both the theoretic and experimental results show that the stress factor is -486.7GPa.mm. The experiment results also show that the Raman spectroscopy is a very effective method for the microstructure residual stress measurement. This method for residual stress measurement by Raman shift is able to be used in textile, biology, materials etc..

Citation Download Citation

Hanchen Liu, Qiuping Wang, Junfang Wu, Chonghui Zhang, Jing Wang, and Yuanhe Tang "Study on residual stress in carbon fibres by Raman spectroscopy", Proc. SPIE 7280, Seventh International Conference on Photonics and Imaging in Biology and Medicine, 728018 (6 March 2009); https://doi.org/10.1117/12.821449

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