Abstract
The behavior of Strain-Hardening Cementitious Composites (SHCC) is often studied at different scales, from single fiber to single crack and further to the composite material. Establishing a model that can link SHCC behavior at different scales is crucial for the design of SHCC through the proper selection or tuning of properties at the microscale. In this paper, the entire scaling up modeling process is presented. Different from existing models that treat the fibers as strings, the fundamental of the model in this study is to treat the fibers as beams so their bending stiffness is taken into account. To verify the model directly, experiments for SHCC were conducted at various scales. Meanwhile, a novel digital image processing method was developed to extract the opening of a single crack from photographs taken during testing. Through the comparison, the ‘beam’ model was found to give a better prediction for SHCC material.
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