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Smoothed contact in a micromechanical model for cement bound materials

Mihai, Iulia Carmen and Jefferson, Anthony Duncan 2013. Smoothed contact in a micromechanical model for cement bound materials. Computers & Structures 118 , pp. 115-125. 10.1016/j.compstruc.2012.11.002

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Abstract

The stability of a micromechanical constitutive model with embedded rough contact is considered. Spurious contact chatter at the constitutive level is reported. A single smooth contact state function-which employs two interpolation functions at contact state boundaries-is proposed to replace three existing discrete contact functions. Following a parametric study, values are assigned to three smoothing parameters that control the shape of the interpolation functions. The contact related instability is efficiently removed without unrealistic alteration of the predicted response. The smoothed contact formulation is then introduced in a constitutive model and its performance assessed in a series of 2D and 3D simulations.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Uncontrolled Keywords: Smoothed contact; Chatter; Constitutive model; Concrete; Micromechanics
Additional Information: Special Issue: UK Association for Computational Mechanics in Engineering
Publisher: Elsevier
ISSN: 0045-7949
Related URLs:
Last Modified: 04 Jun 2017 04:37
URI: http://orca.cf.ac.uk/id/eprint/41528

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