Influence of imperfect interface on the elastic moduli of syntactic foams

• Published in: Computational materials science Vol. 46; no. 2; pp. 327 - 332
• Main Author: Marur, Prabhakar R.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.08.2009; Elsevier
• Subjects: Applied sciences; Cellular; Displacement discontinuity; Effective elastic moduli; Exact sciences and technology; Forms of application and semi-finished materials; Imperfect interface; Interface layer stiffness; Polymer industry, paints, wood; Syntactic foam; Technology of polymers; 62.20.Qp; 62.20.de; Syntactic foam; Displacement discontinuity; 62.20.dj; Effective elastic moduli; Interface layer stiffness; Imperfect interface; Elastic modulus; Uniaxial tension stress; Slip; Cellular plastic; Adhesion; Analytical method; Stiffness; Plastics; Microstructure
• ISSN: 0927-0256; 1879-0801
• DOI: 10.1016/j.commatsci.2009.03.010

Syntactic foams are manufactured by dispersing microspheres in a polymeric matrix, and the macroscale material properties of these foams are estimated by analyzing a periodic distribution of the inclusions. The analysis in the simplest form, further assume that the inclusions are perfectly bonded to the matrix material. It has been shown in a previous study [P.R. Marur, Mater. Lett. 59 (2005) 1954–1957.] that analytical model overestimated the experimentally determined elastic moduli, and that the morphology of particle distribution has negligible influence on the elastic moduli. In this paper, the assumption of perfect adhesion between the inclusion and the matrix is relaxed to allow for possible localized slip and separation at the particle interface. The analytical results obtained considering imperfect interface well agree with the measured elastic modulus reported in the literature.