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Model for the robust mechanical behavior of nacre A.G. Evans and Z. Suo
 

Summary: ARTICLES
Model for the robust mechanical behavior of nacre
A.G. Evans and Z. Suo
Department of Mechanical and Aerospace Engineering and Princeton Materials Institute, Princeton
University, Princeton, New Jersey 08544
R.Z. Wang and I.A. Aksay
Department of Chemical Engineering and Princeton Materials Institute, Princeton University,
Princeton, New Jersey 08544
M.Y. He
Materials Department, University of California, Santa Barbara, California 93106
J.W. Hutchinson
Division of Engineering and Applied Science, Harvard University, Cambridge, Massachusetts 02138
(Received 24 November 2000; accepted 15 May 2001)
The inelastic deformation of nacre that leads to its structural robustness has been
characterized in a recent experimental study. This article develops a model for the
inelastic behavior, measured in tension, along the axis of the aragonite plates. The
model is based on observations for abalone nacre that the inelasticity is associated with
periodic dilatation bands. These bands contain coordinated separations at the periphery
of the plates. The separations open as the material strains. The response is attributed to
nanoscale asperities on the surfaces of the plates. The model calculates the stresses

  

Source: Aksay, Ilhan A. - Department of Chemical Engineering, Princeton University
Hutchinson, John W. - School of Engineering and Applied Sciences, Harvard University
Suo, Zhigang - School of Engineering and Applied Sciences, Harvard University

 

Collections: Engineering; Materials Science; Physics