TY - JOUR
T1 - Accurate determination of the structural elasticity of human hair by a small-scale bending test
AU - Tohmyoh, Hironori
AU - Ishihara, Mitsuharu
AU - Salam Akanda, M. A.
AU - Yamaki, Satoshi
AU - Watanabe, Tomoko
AU - Iwabuchi, Tokuro
PY - 2011/11/10
Y1 - 2011/11/10
N2 - This paper reports on a small-scale bending method for human hair. The test sample, which is elliptical in cross-section, is fixed to a hollow steel needle using resin to form a cantilever. A loading probe is used to subject this to a lateral load, where the load is applied parallel to either the long or short axis of the elliptical cross-section. From these tests, load-displacement relationships for the hair were obtained. From the experimental data and analysis, we found that the structural elasticity determined is independent of the direction of bending, and precise measurements of the structural elasticity of human hair with scattering of less than 5% were realized using this test scheme. Finally, changes in the structural elasticity of hair due to hair treatments were detected and the changes are discussed based on a theoretical model of the multi-layered structure.
AB - This paper reports on a small-scale bending method for human hair. The test sample, which is elliptical in cross-section, is fixed to a hollow steel needle using resin to form a cantilever. A loading probe is used to subject this to a lateral load, where the load is applied parallel to either the long or short axis of the elliptical cross-section. From these tests, load-displacement relationships for the hair were obtained. From the experimental data and analysis, we found that the structural elasticity determined is independent of the direction of bending, and precise measurements of the structural elasticity of human hair with scattering of less than 5% were realized using this test scheme. Finally, changes in the structural elasticity of hair due to hair treatments were detected and the changes are discussed based on a theoretical model of the multi-layered structure.
KW - Area moment of inertia
KW - Hair treatment
KW - Human hair
KW - Loading direction
KW - Small-scale bending test
KW - Structural elasticity
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U2 - 10.1016/j.jbiomech.2011.07.025
DO - 10.1016/j.jbiomech.2011.07.025
M3 - Article
C2 - 21924726
AN - SCOPUS:80055091789
SN - 0021-9290
VL - 44
SP - 2833
EP - 2837
JO - Journal of Biomechanics
JF - Journal of Biomechanics
IS - 16
ER -
