Measurement of Young's modulus and Poisson's ratio of human hair using optical techniques

Zhenxing Hu; Gaosheng Li; Huimin Xie; Tao Hua; Pengwan Chen; Fenglei Huang

doi:10.1117/12.851415

14 April 2010 Measurement of Young's modulus and Poisson's ratio of human hair using optical techniques

Zhenxing Hu, Gaosheng Li, Huimin Xie, Tao Hua, Pengwan Chen, Fenglei Huang

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 75222Q (2010) https://doi.org/10.1117/12.851415
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

Abstract

Human hair is a complex nanocomposite fiber whose physical appearance and mechanical strength are governed by a variety of factors like ethnicity, cleaning, grooming, chemical treatments and environment. Characterization of mechanical properties of hair is essential to develop better cosmetic products and advance biological and cosmetic science. Hence the behavior of hair under tension is of interest to beauty care science. Human hair fibers experience tensile forces as they are groomed and styled. Previous researches about tensile testing of human hair were seemingly focused on the longitudinal direction, such as elastic modulus, yield strength, breaking strength and strain at break after different treatment. In this research, experiment of evaluating the mechanical properties of human hair, such as Young's modulus and Poisson's ratio, was designed and conducted. The principle of the experimental instrument was presented. The system of testing instrument to evaluate the Young's modulus and Poisson's ratio was introduced. The range of Poisson's ratio of the hair from the identical person was evaluated. Experiments were conducted for testing the mechanical properties after acid, aqueous alkali and neutral solution treatment of human hair. Explanation of Young's modulus and Poisson's ratio was conducted base on these results of experiments. These results can be useful to hair treatment and cosmetic product.

Citation Download Citation

Zhenxing Hu, Gaosheng Li, Huimin Xie, Tao Hua, Pengwan Chen, and Fenglei Huang "Measurement of Young's modulus and Poisson's ratio of human hair using optical techniques", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75222Q (14 April 2010); https://doi.org/10.1117/12.851415

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