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Research Papers

Assessment of Mechanical Properties of Interphase in Compositelike Geomaterials by Ultrasonic Measurement and the Extended Multi-Inclusion Model

[+] Author and Article Information
Duc-Phi Do

Laboratory PRISME,
Polytech’ Orleans,
8 rue Léonard de Vinci,
Orleans Cedex 2 45072, France
e-mail: Duc-phi.do@univ-orleans.fr

Dashnor Hoxha

Laboratory PRISME,
Polytech’ Orleans,
8 rue Léonard de Vinci,
Orleans Cedex 2 45072, France
e-mail: Dashnor.hoxha@univ-orleans.fr

Truong-Son Bui

Laboratory PRISME,
Polytech’ Orleans,
8 rue Léonard de Vinci,
Orleans Cedex 2 45072, France
e-mail: buitruongsondcct@gmail.com

1Corresponding author.

Manuscript received September 25, 2014; final manuscript received December 30, 2014; published online January 23, 2015. Assoc. Editor: Daining Fang.

J. Appl. Mech 82(3), 031001 (Mar 01, 2015) (10 pages) Paper No: JAM-14-1448; doi: 10.1115/1.4029487 History: Received September 25, 2014; Revised December 30, 2014; Online January 23, 2015

This work aims at assessing the mechanical properties of interphase in a compositelike geomaterial by using a nondestructive characterization technique by ultrasound and an inversion procedure based on the theoretical multi-inclusion model. This latter model is extended here and adapted for the multiphase heterogeneous materials which may contain an arbitrary number of interphases between each inhomogeneity and matrix phase. Some numerical applications on a cement-based geomaterial show that this procedure can be used as a complementary method to characterize the properties of interphase.

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Figures

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Fig. 1

Sketch of the multi-inclusion model adapted to the multiphase heterogeneous materials

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Fig. 2

Conceptual model of the multiphase heterogeneous material-like mortar

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Fig. 3

Influence of the porosity and morphology of pores to the effective Young’s modulus of material

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Fig. 4

Influence of the elastic properties (a) and thickness of the interphase to the effective Young’s modulus of material (b) (results calculated with fp = 0 and fi = 0.45)

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Fig. 5

Influence of porosity, mechanical properties, and thickness of the interphase to the effective Young’s modulus of material (results calculated with volume fraction of inclusion fi = 0.45 and spherical pores)

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Fig. 6

Experimental device used for measurements of ultrasonic velocities (a) and example of curves of pore access radii obtained by mercury intrusion technique (b) on studied materials

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Fig. 7

Young’s modulus (a) and Poisson’s ratio (b) of samples of cement paste and mortar obtained from the measured ultrasonic velocities

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Fig. 8

Young’s modulus (a) and Poisson’s ratio (b) of cement paste: comparison of the numerical and experimental results

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Fig. 9

Mechanical properties of ITZ as a function of its thickness obtained from the inversion of ultrasonic measurement for grain sands radius equal to r = 425 μm

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