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Application of nano-indenter for investigation of the properties of the elytra cuticle of the dung beetle (Copris ochus Motschulsky)

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3 Author(s)
Sun, J.Y. ; Key Lab. of Terrain-Machine Bionics Eng., Jilin Univ., Changchun ; Tong, J. ; Zhou, J.

The nanomechanical properties of the multilayer elytra cuticle of the dung beetle (Copris ochus Motschulsky) were investigated in the vertical and transverse directions using a nano-indenter. The reduced modulus Ev and hardness Hv of the surface cuticle in the vertical direction obtained by nano-indentation were 3.54plusmn0.12 GPa and 0.20plusmn0.01 GP, respectively. The nano-indentation result showed that the reduced modulus Et and hardness Ht of each layer were gradually reduced from the outer layer to the inner layer in the transverse direction. Ev was less than the largest Et presented at the outer layer (7.06plusmn0.54 GPa). It was supposedly formed as a result of the composite effect of the multilayer. Without consideration of the anisotropy of chitin, an experimental model was proposed to describe the nanomechanical properties of the elytra cuticle

Published in:

Nanobiotechnology, IEE Proceedings -  (Volume:153 ,  Issue: 5 )

Date of Publication:

October 2006

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