Journal
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
Volume 53, Issue 2, Pages 253-261Publisher
SCIENCE PRESS
DOI: 10.1007/s11433-009-0268-x
Keywords
concrete; micromechanics; impact loading; constitutive model
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Funding
- National Natural Science Foundation of China [10625208]
- Science Foundation of Ningxia University [ndzr09-5]
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This paper takes concrete as a four-phase composite made of the intact matrix and three mutually perpendicular groups of penny-shaped micro-cracks. The intact matrix is assumed to be elastic, homogeneous and isotropic, and the micro-cracks are penny-shaped. Combined with the failure mechanism of concrete subjected to impact loading, a dynamic constitutive model for concrete is developed based on Mori-Tanaka's average stress concept and Eshelby's equivalent inclusion theory. Experimental results show that concrete is rate-dependent. The model predictions are in good agreement with the experimental results. The model may be used to simulate the mechanical behavior of concrete under impact loadings.
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