Micromechanics based constitutive model for interface shear

M. P. Divakar, A. Fafitis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

A new constitutive model for interface shear in concrete is presented. The composite is treated as a single-phase medium with no distinction in the strength difference between the matrix and the inclusions. The model consists of an assemblage of springs and a triangular asperity as a statistically equivalent replacement of the rough crack surfaces. The constitutive model relates the normal and shearing stresses and displacements in terms of the interface strength, contact areas, the contact angle of the rough crack surface, and the crack closing pressure. Using the concepts of critical state soil mechanics, conditions were stipulated for dilation and contraction of the rough crack, in terms of the intensity of constant normal stresses applied. The deformability of the asperity was mathematically described in terms of the initial angle of contact and a progression of this angle to a minimum by means of an exponential model. Using idealized test results, a mathematical model was developed for contact area as a function of the crack width and tangential displacement. The performance of the constitutive model was verified by predicting the experimental results. The comparisons appear to be very satisfactory.

Original languageEnglish (US)
Title of host publicationAmerican Society of Mechanical Engineers, Petroleum Division (Publication) PD
Place of PublicationNew York, NY, United States
PublisherPubl by ASME
Pages237-245
Number of pages9
Volume32
StatePublished - 1990
EventComposite Material Technology 1990 - Presented at the Thirteenth Annual Energy-Sources Technology Conference and Exhibition - New Orleans, LA, USA
Duration: Jan 14 1990Jan 18 1990

Other

OtherComposite Material Technology 1990 - Presented at the Thirteenth Annual Energy-Sources Technology Conference and Exhibition
CityNew Orleans, LA, USA
Period1/14/901/18/90

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ASJC Scopus subject areas

  • Geology

Cite this

Divakar, M. P., & Fafitis, A. (1990). Micromechanics based constitutive model for interface shear. In American Society of Mechanical Engineers, Petroleum Division (Publication) PD (Vol. 32, pp. 237-245). Publ by ASME.