TY - JOUR
T1 - Effect of polydispersivity and porosity on the elastic properties of hollow particle filled composites
AU - Aureli, M.
AU - Porfiri, M.
AU - Gupta, N.
N1 - Funding Information:
This work was supported by the Office of Naval Research grant N0 0014–07-1–0419 with Dr. Y.D.S. Rajapakse as the program manager and by the National Science Foundation grant CMMI-0726723 . Views expressed herein are those of the authors, and not of the funding agencies. The authors would like to gratefully acknowledge Mr. Gabriele Tagliavia for providing the experimental data on three point bending tests and some of the micrographs.
PY - 2010/7
Y1 - 2010/7
N2 - Hollow particle filled composites are characterized by a variety of properties of interest to marine structural applications, including low density, high specific modulus, and low moisture absorption. Usually, dispersed microspheres exhibit widely different geometric characteristics, such as wall thickness and outer radius. In this paper, we develop a homogenization technique based on the differential scheme that accounts for polydispersivity in geometry of inclusion phases in hollow particle reinforced composites. We find manageable differential expressions to predict the composite effective moduli in terms of a variety of concurrent factors, including matrix and particle elastic constants, geometrical properties of hollow particles, volume fractions, and void content in the matrix. Theoretical findings are validated by experimental data and are compared with results of several published models. We find that accounting for polydispersion in the model allows for a closer agreement with experimental results than monodisperse schemes. In particular, qualitatively different predictions are observed in syntactic foams containing thin walled particles when accounting for polydispersivity.
AB - Hollow particle filled composites are characterized by a variety of properties of interest to marine structural applications, including low density, high specific modulus, and low moisture absorption. Usually, dispersed microspheres exhibit widely different geometric characteristics, such as wall thickness and outer radius. In this paper, we develop a homogenization technique based on the differential scheme that accounts for polydispersivity in geometry of inclusion phases in hollow particle reinforced composites. We find manageable differential expressions to predict the composite effective moduli in terms of a variety of concurrent factors, including matrix and particle elastic constants, geometrical properties of hollow particles, volume fractions, and void content in the matrix. Theoretical findings are validated by experimental data and are compared with results of several published models. We find that accounting for polydispersion in the model allows for a closer agreement with experimental results than monodisperse schemes. In particular, qualitatively different predictions are observed in syntactic foams containing thin walled particles when accounting for polydispersivity.
KW - Homogenization
KW - Particle reinforced composites
KW - Polydispersivity
KW - Porosity
KW - Syntactic foams
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U2 - 10.1016/j.mechmat.2010.05.002
DO - 10.1016/j.mechmat.2010.05.002
M3 - Article
AN - SCOPUS:77955717551
SN - 0167-6636
VL - 42
SP - 726
EP - 739
JO - Mechanics of Materials
JF - Mechanics of Materials
IS - 7
ER -