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发表时间：2022-10-10

发表刊物：工程力学

卷号：25

期号：9

页面范围：72-78

ISSN号：1000-4750

摘要：Concrete is considered to be one of two-phase composite materials
   composed of cement matrix and aggregates. At meso-scale level, the
   digital image processing method is used as a measurement tool to
   construct a digital representation for the distribution and the shape of
   aggregates in concrete; and at micro-scale level, statistical method is
   used to describe the inhomogeneity of component materials. A multi-scale
   coupled numerical model that can simulated damage evolution of concrete
   under loading is proposed by taking into account the material
   inhomogeneity at micro-scale and meso-scale level. The failure process
   of concrete is simulated by this model under uniaxial stress. The
   computing results show that this model can take into account the
   influence of the distribution of aggregates and respective heterogeneity
   of component materials on mechanical performance of concrete and is able
   to capture the complete failure process of concrete materials that
   includes the initiation, propagation and coalescence of microcracks as
   well as cracking pattem associated with different loading stages.

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