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Description:

The local and global mechanical properties of a mineralized biological material using the mud crab as a model material were investigated and compared. The stress–strain (s–s) curves for wet and dry conditions of the endocuticle were exactly examined by performing tensile tests with strain gauges. The local properties were examined through nanoindentation testing (NI) in a dry condition. The global Young's modulus, E, evaluated from the slope of the linear part of the s–s curve, did not vary with wet or dry specimen conditions; however, the stress and strain required to fracture depended on the conditions. The E was compared with the results of property mapping obtained from NI. Due to local differences in the grade of mineralization in the exoskeleton, the mapping indicated that nanoindentation tests should be performed for an extensive region of the cuticle. The results will provide useful information for future material development based on biomimetics.

Rights:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

Keyword: Biomaterials, Mechanical properties mapping, Crustacean material, Nanoindentation, Tension test

Date published: 2024-09-25

Publisher: Elsevier BV

Journal:

• Journal of Materials Research and Technology (ISSN: 22387854) vol. 33 p. 2210-2215

Funding:

• Japan Society for the Promotion of Science JP21H04537
• Iketani Science and Technology Foundation 0361243-A

Manuscript type: Publisher's version (Version of record)

MDR DOI:

First published URL: https://doi.org/10.1016/j.jmrt.2024.09.194

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Updated at: 2024-09-30 16:30:14 +0900

Published on MDR: 2024-09-30 16:30:14 +0900