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Advances in Materials Research
  Volume 7, Number 3, September 2018, pages 185-194
DOI: http://dx.doi.org/10.12989/amr.2018.7.3.185
 
Mechanical properties of top neck mollusks shell nano composite in different environmental conditions
Abolfazl Darvizeh, Asghar Zajkani and Amin Nouroozi Masir

 
Abstract     [Full Text]
    The mechanism of biological materials structure is very complex and has optimal properties compared to engineering materials. Top Neck mollusks shells, as an example of biological materials, have hierarchical structure, which 95 percent of its structure is Aragonite and 5 percent organic materials. This article detected mechanical properties of the Top Neck mollusks shell as a Nano composite using Nano-indentation method in different situations. Research findings indicate that mechanical properties of the Top Neck mollusks shell including elastic modulus and hardness are higher than a fresh one preserved in -50 centigrade and also a Top Neck mollusks shell preserved in environmental conditions. Nano-indentation test results are so close in range, overall, that hardness degree is 3900 to 5200 MPa and elastic modulus is 70 to 85 GPa.
 
Key Words
    nano indentation; top neck mollusks shell; mechanical properties; elastic modulus; hardness
 
Address
(1) Abolfazl Darvizeh:
Department of Mechanical Engineering, University Campus 2, University of Guilan, Rasht, Iran;
(2) Asghar Zajkani:
Department of Mechanical Engineering, University of Guilan, Rasht, Iran;
(3) Amin Nouroozi Masir:
Department of Mechanical Engineering, Imam Khomeini International University, Qazvin, Iran.
 

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