Structure and mechanical properties of pincers of lobster (Procambarus clarkii) and crab (Eriocheir Sinensis)

Journal of the Mechanical Behavior of Biomedical Materials
Fei ZhouKangmin Chen

Abstract

The structure and mechanical properties of the pincer exoskeletons (cuticles) of lobster (Procambarus clarkii) and crab (Eriocheir Sinensis) were investigated, respectively. The microstructures and inorganic materials of the pincer exoskeletons were observed and determined using a scanning electron microscope and X-ray diffraction. The mechanical properties of the pincer exoskeletons were evaluated by nano-indentation tests and tensile tests under different conditions. The results showed that the inorganic materials in the lobster claw exoskeleton exhibited an amorphous structure, while those in the crab claw exoskeleton were crystallized as calcium carbonate with a calcite crystal structure and were stable at the temperature below 250 degrees C. The surfaces of the pincers were biologically unsmooth. Many concave valleys with setae near the tip and many convex domes far off the tip were observed on the surface of the lobster pincer, while many micro-spines were seen on the surface of crab pincer. The microstructures of the pincer exoskeleton exhibited highly mineralized chitin-protein fibers arranged in a twisted plywood structure. The surface hardness and elastic modulus of the crab claws were 0.33 GPa and 8.18 GPa, respectiv...Continue Reading

References

Feb 27, 2008·Acta Biomaterialia·Po-Yu ChenMarc André Meyers

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Citations

May 10, 2016·Materials Science & Engineering. C, Materials for Biological Applications·Wanyong TuoYong Wang
Sep 23, 2014·Journal of the Mechanical Behavior of Biomedical Materials·Bin ChenShiyun Lin
Jun 22, 2018·Microscopy and Microanalysis : the Official Journal of Microscopy Society of America, Microbeam Analysis Society, Microscopical Society of Canada·Shiyun LinWei Ye
Sep 13, 2020·Materials·Puspa Restu SayektiParvez Alam
May 22, 2020·Acta Biomaterialia·Miranda N RosenGary H Dickinson

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