A constitutive model is proposed to investigate the strengthening mechanism and the relationship between nanostructures and effective mechanical properties of the aluminum-based amorphous nanocomposites. A continuum micromechanics-based, three-phase composite model comprises of Al particles, rare-earth enriched interlayers, and the amorphous aluminum matrix. The local stress field and deformation are formulated based on the concept of eigenstrain and equivalent inclusion method with consideration of both the particle-interlayer-matrix interaction and the particle-particle interaction. An ensemble-volume averaging technique is conducted to obtain the overall elastoplastic constitutive behavior for amorphous nanocomposites with randomly distributed spherical nanoparticles. Explicit expressions of the effective elastic stiffness and yield function in terms of the constituent properties and nanostructures are obtained. The effective elastoplastic stress-strain curves for uniaxial loading and the initial yield surfaces for axisymmetric loading are calculated. Simulations are conducted to investigate the effects of the particle size and pairwise particle interaction on the effective mechanical properties.
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A Micromechanics-Based Elastoplastic Model for Amorphous Composites With Nanoparticle Interactions
H. T. Liu,
H. T. Liu
American Bureau of Shipping
, ABS Plaza, Houston, TX 77060
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L. Z. Sun
L. Z. Sun
Department of Civil and Environmental Engineering,
e-mail: lsun@uci.edu
University of California
, Irvine, CA 92697-2175
Search for other works by this author on:
H. T. Liu
American Bureau of Shipping
, ABS Plaza, Houston, TX 77060
L. Z. Sun
Department of Civil and Environmental Engineering,
University of California
, Irvine, CA 92697-2175e-mail: lsun@uci.edu
J. Appl. Mech. May 2008, 75(3): 031009 (10 pages)
Published Online: April 8, 2008
Article history
Received:
February 26, 2007
Revised:
August 23, 2007
Published:
April 8, 2008
Citation
Liu, H. T., and Sun, L. Z. (April 8, 2008). "A Micromechanics-Based Elastoplastic Model for Amorphous Composites With Nanoparticle Interactions." ASME. J. Appl. Mech. May 2008; 75(3): 031009. https://doi.org/10.1115/1.2839899
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